Critical Environments Model 8682KET Sequenced Offset (Flow Tracking) and Static Pressure Controller with Dual Exhaust Modulation for Temperature Control Manual Supplement Contents of this manual supplement include: Sequence of operation Menu structure diagram of new software items Deleted software menu items Wiring Diagram Sequence of Operation General The Model 8682KET combines offset (flowtracking) and static pressure controllers into a single package. The offset control modulates general exhaust and supply air dampers to keep the exhaust air a set volume greater than the supply air, maintaining laboratory balance. The static pressure control modulates a damper in the total exhaust duct to maintain a duct pressure setpoint. The Model 8682KET prioritizes its control modes as follows: 1. Maximum Exhaust Flow 2. Offset 3. Static Pressure Offset Control Sequence The Model 8682KET measures the supply and exhaust flows for the space. The Model 8682KET modulates the general exhaust and supply to maintain a fixed offset between the supply and total exhaust flows, thus maintaining pressurization. The supply flow rate has userprogrammable minimum and maximum set points. SUREFLOW is a trademark of TSI Incorporated.
Exhaust Flow Sequence The Model 8682KET features independent minimum and maximum flow or damper setpoints for the exhaust. Selection of damper opening or flow for supply and exhaust is done through the MINMAX item in the CONFIGURE menu. Each exhaust will not close more than its MIN GX# damper position/flow setpoint or open more than its MAX GX# damper position/flow setpoint. When additional exhaust air is required to maintain laboratory balance, the Model 8682KET will first open General Exhaust #1. Should General Exhaust #1 reach its maximum flow/damper opening setpoint and more exhaust is still necessary, the Model 8682KET will then open General Exhaust #2 until it reaches its maximum damper /flow opening setpoint. If the maximum total exhaust flow (MAX FLO SET) is reached, the controller will reduce the exhaust flow by first closing the damper for General Exhaust #2 until it reaches its minimum flow/damper opening. If a further reduction in exhaust is needed, the Model 8682KET will close General Exhaust #1 until it reaches its minimum flow/damper opening. If a further reduction in flow is required the controller will then reduce the exhaust duct static pressure. CAUTION: Limiting the maximum flow volume may result in lowflows through devices such as fume cupboards connected to the controlled duct. Static Pressure Control Sequence The Model 8682KET controller measures the duct static pressure, and modulates a damper or VFD to obtain a desired pressure setpoint. Static pressure control may not be maintained when the Model 8682KET is in the Maximum Exhaust Flow mode. Supply Sequencing The Model 8682KET features independent control of two supply dampers. Each supply has its own minimum and maximum flow or damper setpoints. Selection of damper opening or flow for supply and exhaust is done through the MINMAX item in the CONFIGURE menu. When more supply air is needed, the Model 8682KET will first open Supply #1 from its minimum to its maximum damper position. The Model 8682KET will only open Supply #2 from its minimum to its maximum damper position when Supply #1 is at its maximum damper position. Menu Structure The SUREFLOW controller is a very versatile device that can be configured to meet your specific application. This section describes all of the menu items available to program and change. Changing any item is accomplished by using the keypad, or if communications are installed, through the RS485 Communications port. If you are unfamiliar with the keystroke procedure please see Programming Software for a detailed explanation. This section provides the following information: Complete list of menu and all menu items. Gives the menu or programming name. Defines each menu item s function; what it does, how it does it, etc.. Gives the range of values that can be programmed. Gives default item value (how it shipped from factory). The menus covered in this section are divided into groups of related items to ease programming. As an example all set points are in one menu, alarm information in another, etc. The manual follows the menus as programmed in the controller. The menu items are always grouped by menu and then listed in menu item order, not alphabetical order. Figure 1, on the next page, shows a chart of the Model 8682KET controller menu items. 2
SETPOINTS ALARM CONFIGURE CONTROL VENT MIN SET MAX SUP SET OFFSET ST SETPOINT MAX FLO SET MIN SUP1 MIN SUP2 MIN ST MIN EX1 MIN EX2 MAX SUP1 MAX SUP2 MAX ST MAX EX1 MAX EX2 MIN SUP ALM MIN EX ALM MIN EX1 ALM MIN EX2 ALM MAX SUP ALM MAX EX ALM LOW ST ALM HIGH ST ALM ALARM RESET AUDIBLE ALM FL ALM DELAY ST ALM DELAY MUTE TIMEOUT UNITS MINMAX ACCESS CODES FL SPEED FL SENS ST SPEED ST SENS FL CNTRL SIG ST CNTRL SIG FL Kc VALUE FL Ti VALUE ST Kc VALUE ST Ti VALUE SYSTEM FLOW FLOW CHECK DIAGNOSTICS INPUT CHECK STATIC PRESS TOT SUP FLOW TOT EX FLOW OFFSET VALUE SUP SETPOINT EXH SETPOINT SUP1 FLOW IN SUP2 FLOW IN EX1 FLOW IN EX2 FLOW IN CONTROL SUP1 CONTROL SUP2 CONTROL ST CONTROL EX1 CONTROL EX2 ST ALM REL MIN EXH REL SUP ALM REL MAX EXH REL RESET TO DEF SUP1 SUP2 EX1 EX2 ST INTERFACE SUP 1 FLOW SUP 2 FLOW EX1 FLOW NET PROTOCOL NET ADDRESS SP1 DCT AREA SP1 FLO ZERO SP1 KFACTOR SP LO SETP SP HI SETP SP1 LOW CAL SP1 LOW CAL RESET CAL SP2 DCT AREA SP2 FLO ZERO SP2 KFACTOR SP LO SETP SP HI SETP SP2 HIGH CAL SP2 HIGH CAL RESET CAL EX1 DUCT AREA EX1 FLOW ZERO EX1 KFACTOR EX1 LOW SETP EX1 HIGH SETP EX1 LOW CAL EX1 HIGH CAL RESET CAL EX2 FLOW PRESSURE EX2 DUCT AREA EX2 FLOW ZERO EX2 KFACTOR EX2 LOW SETP EX2 HIGH SETP EX2 LOW CAL EX2 HIGH CAL RESET CAL ST XDCR OUT ST MAX PRESS ST ZERO ST SPAN RESET CAL Figure 1: Menu s Model 8682KET Controller 3
of New Software Menu s The following menu items have been added. SETPOINTS MENU OFFSET The OFFSET menu item sets the offset between the total exhaust flow (fume hood, general exhaust, and other exhaust) and total supply flow. Range 10,000 CFM to 10,000 CFM (4719 l/s to 4719 l/s) ST SETPOINT MAX FLO SET MIN SUP1 MIN SUP2 MIN ST MIN EX1 MIN EX2 MAX SUP1 MAX SUP2 MAX ST MAX EX1 MAX EX2 The ST SETPOINT menu item is used to set the static pressure setpoint for the exhaust duct. The MAX FLO SET menu item is used to set the maximum exhaust flow setpoint. The Model 8682KET will not allow the volumetric flow rate to rise higher than the MAX FLO SET, even if the flow rate limits the exhaust duct static pressure. MAX FLO SET must be set to a value less than the sum of MAX EX1 and MAX EX2. The MIN SUP# menu items set the minimum supply flow or damper opening. The Model 8682KET will not close a supply more than its MIN SUP# value. Selecting minimum flow or damper opening is accomplished with the MINMAX item in the CONFIGURE menu. The MIN ST menu item sets the minimum static pressure damper opening. The Model 8682KET will not close the static pressure damper more than its MIN ST value. The MIN EX# menu items set the minimum exhaust flow or damper opening. The Model 8682KET will not close an exhaust damper more than the MIN EX# value. Selecting minimum flow or damper opening is accomplished with the MINMAX item in the CONFIGURE menu. The MAX SUP# menu items set the maximum supply flow or damper opening. The Model 8682KET will not open a supply more than its MAX SUP# value. Selecting minimum flow or damper opening is accomplished with the MINMAX item in the CONFIGURE menu. MAX SUP1 and MAX SUP2 values must be set to a value greater than MIN SUP1 and MIN SUP2 respectively. The MAX ST menu item sets the maximum static pressure damper opening. The Model 8682KET will not open the static pressure damper more than its MAX ST# value. The MAX EX# menu items set the maximum exhaust damper opening. The Model 8682KET will not open the exhaust more than the MAX EX# value. Selecting minimum flow or damper opening is accomplished with the MINMAX item in the CONFIGURE menu. MAX EXH1 and MAX EXH2 values must be set to a value greater than MIN EXH1 and MIN EXH2 respectively. 0 0 ST MAX PRESS (0.2 H 2 O, 50 Pa) OFF, 10 to 10,000 CFM (5 to 4719 l/s) OFF 10 to 10,000 CFM (5 to 4719 l/s), (0 CFM) 0100% OPEN (0% OPEN) 0100% OPEN (0% OPEN) 10 to 10,000 CFM (5 to 4719 l/s), (0 CFM) 0100% OPEN (0% OPEN) 10 to 10,000 CFM (5 to 4719 l/s), (2,000 CFM) 0100% OPEN (0% OPEN) 0100% OPEN (100% OPEN) 10 to 10,000 CFM (5 to 4719 l/s), (2,000 CFM) 0100% OPEN (0% OPEN) 4
ALARM MENU MIN EX ALM MIN EX1 ALM MIN EX2 ALM MAX SUP ALM LOW ST ALARM HIGH ST ALARM FL ALM DELAY ST ALM DELAY CONFIGURE MENU MINMAX The MIN EX ALM menu item sets the minimum exhaust volume alarm setpoint. A minimum exhaust alarm condition is defined as when the total exhaust falls below the MIN EX ALM setpoint. Note: Alarm relays for the MIN EX ALM are Normally Closed (NC) and Open to indicate an alarm condition. The MIN EX ALM relay will stay closed if the Model 8682KET loses power. The MIN EX# ALM menu item sets the minimum exhaust volume alarm setpoint. A minimum exhaust alarm condition is defined as when exhaust 1 or 2 falls below its MIN EX# ALM setpoint. Note: Alarm relays for the MIN EX# ALM are Normally Closed (NC) and Open to indicate an alarm condition. The MIN EX ALM relay will stay closed if the Model 8682KET loses power. The MAX SUP ALM menu item sets the maximum supply volume alarm setpoint. A maximum supply volume alarm is defined as when the total supply falls below the MAX SUP ALM setpoint. The LOW ST ALARM menu item sets the low static pressure alarm setpoint. A low alarm condition is defined as when the magnitude of the duct static pressure falls below the LOW ST ALARM setpoint. The HI ST ALARM menu item sets the high static pressure alarm setpoint. A high alarm condition is defined as when the magnitude of the duct static pressure rises above the HI ST ALARM setpoint. The FL ALM DELAY menu item determines the length of time the alarm is delayed after a flow or temperaturebased alarm has been detected. The delay affects the visual and audible alarm for the MIN SUP ALM, MAX EXH ALM and HIGH TMP ALM. The ST ALM DELAY menu item determines the length of time the alarm is delayed after a staticbased alarm has been detected. The delay affects the visual and audible alarm for the LOW and HI ST ALMs. The MINMAX menu item sets the minimum and maximum setpoint type for the supply and exhaust. If MINMAX is set to FLOW, then MIN SUP#, MIN EX#, MAX SUP# and MAX EX# will be flow units of CFM or l/s. If MINMAX is set to POSITION, then MIN SUP#, MIN EX#, MAX SUP# and MAX EX# will be damper positions with units of % OPEN. Range OFF, 10 to 10,000 CFM (5 to 4719 l/s) OFF OFF, 10 to 10,000 CFM (5 to 4719 l/s) OFF OFF, 10 to 10,000 CFM (5 to 4719 l/s) OFF OFF, 0ST MAX PRESS OFF OFF, 0ST MAX PRESS OFF 20600 seconds 20 seconds 20600 seconds 20 seconds Range FLOW, POSITION (FLOW) 5
CONTROL MENU FL SPEED ST SPEED FL SENS ST SENS FL CONTROL SIG ST CONTROL SIG The FL SPEED and ST SPEED menu items are used to select the control output speed for the offset (flow) and static pressure control, respectively. There are 10 bars, each representing 10% of the maximum speed. Starting from the right side (+ sign), 10 bars displayed indicates maximum speed, or the fastest the controller can operate. 1 bar is the slowest the control output can operate. The more bars shown, the faster the operation. The FL SENS and ST SENS menu items are used to select the integral dead band for the offset (flow) control. The integral dead band determines when the controller uses integral (slow) control, and when the controller enters PID (fast) control. When this item is selected, a bar graph will be shown on the display. There are 10 bars, each representing 50 CFM (24 l/s) for flow. Starting from the right side (+ sign), 10 bars displayed indicates no dead band, so the controller will always be in PID control mode. The fewer bars displayed, the larger the integral deadband. For example, with 8 bars displayed and an offset of 500 cfm (240 l/s), the integral deadband is between 400 and 600 cfm (189 to 283 l/s). When the measured offset is within this range, integral or slow control is used. However, should the offset drop below or rise above this range, PID control is enabled until the unit returns within the deadband. The FL SENS and ST SENS items have a unique feature that when zero bars are displayed, the unit never goes into PID control. Similarly, when ten bars are displayed, the unit never enters integral control, which may lead to an unstable system. The FL CONTROL SIG and ST CONTROL SIG menu items determine the control signal s output direction. Range 0 to 10 bars 5 bars 0 to 10 bars 5 bars DIRECT / REVERSE DIRECT 6
CONTROL MENU FL Kc VALUE FL Ti VALUE WARNING: The FL Kc VALUE and FL Ti VALUE allow you to manually change the primary PID control loop variables. DO NOT CHANGE THESE VALUES UNLESS YOU HAVE A THOROUGH UNDERSTANDING OF PID CONTROL LOOPS. CONTACT TSI FOR ASSISTANCE PRIOR TO CHANGING ANY VALUES. Contact TSI for assistance in determining your control problem and for instructions on how to change a value. Incorrectly changing a value will result in poor or nonexistent control. Range Kc = 0 1000 Ti = 01000 The range of values is very large. Poor control will occur if values are more than twice or less than 1/2 the default value. Suggestion: Before changing Kc or Ti, change the SPEED or adjust the SENSITIVITY to try to eliminate the problem. FL Kc = 80 FL Ti = 200 The FL Kc VALUE item changes the gain control coefficient of the primary control loop (flow tracking loop). When this item is entered, a value for Kc is indicated on the display. If the AOC is not controlling correctly, the Kc gain control coefficient may need adjusting. Decreasing Kc will slow the control system down, which will increase stability. Increasing Kc will increase the control system which may cause system instability. The FL Ti VALUE item changes the integral control coefficient of the primary control loop (flow tracking loop). When this item is entered, a value for Ti is indicated on the display. If the AOC is not controlling correctly, the unit may have an inappropriate integral control coefficient. Increasing Ti will slow the control system which will increase stability. Decreasing Ti will increase the control system speed which may cause system instability. 7
CONTROL MENU ST Kc VALUE ST Ti VALUE WARNING: The ST Kc VALUE and ST Ti VALUE allow you to manually change the primary PID control loop variables. DO NOT CHANGE THESE VALUES UNLESS YOU HAVE A THOROUGH UNDERSTANDING OF PID CONTROL LOOPS. CONTACT TSI FOR ASSISTANCE PRIOR TO CHANGING ANY VALUES. Contact TSI for assistance in determining your control problem and for instructions on how to change a value. Incorrectly changing a value will result in poor or nonexistent control. Range Kc = 0 1000 Ti = 01000 The range of values is very large. Poor control will occur if values are more than twice or less than 1/2 the default value. Suggestion: Before changing Kc or Ti, change the SPEED or adjust the SENSITIVITY to try to eliminate the problem. ST Kc = 80 ST Ti = 200 The ST Kc VALUE item changes the gain control coefficient of the primary control loop (flow tracking loop). When this item is entered, a value for Kc is indicated on the display. If the AOC is not controlling correctly, the Kc gain control coefficient may need adjusting. Decreasing Kc will slow the control system down, which will increase stability. Increasing Kc will increase the control system which may cause system instability. The ST Ti VALUE item changes the integral control coefficient of the primary control loop (flow tracking loop). When this item is entered, a value for Ti is indicated on the display. If the AOC is not controlling correctly, the unit may have an inappropriate integral control coefficient. Increasing Ti will slow the control system which will increase stability. Decreasing Ti will increase the control system speed which may cause system instability. DIAGNOSTICS MENU CONTROL SUP1 The CONTROL SUP# items manually change the control output signal to the supply CONTROL SUP2 actuator/damper (or motor speed drive). When this item is entered, a number between 0% OPEN and 100% OPEN will be shown on the display indicating the control output value. Pressing the / keys change the count on the display. Pressing the key increases the displayed value, while pressing the key decreases the displayed value. The supply air damper or VAV box should change (modulate) as the number changes. WARNING: The CONTROL SUP# functions override the AOC control signal. Adequate supply air volume and room balance will NOT be maintained while in this item. 8
DIAGNOSTICS MENU CONTROL ST The CONTROL ST item manually changes the control output signal to the static pressure actuator/damper (or motor speed drive). When this item is entered, a number between 0% OPEN and 100% OPEN will be shown on the display indicating the control output value. Pressing the / keys change the count on the display. Pressing the key increases the displayed value, while pressing the key decreases the displayed value. The supply air damper or VAV box should change (modulate) as the number changes. CONTROL GX1 CONTROL GX2 WARNING: The CONTROL ST functions override the AOC control signal. Adequate duct static pressure will NOT be maintained while in this item. The CONTROL GX# items manually change the control output signal to the general exhaust actuator/damper (or motor speed drive). When this item is entered, a number between 0% OPEN and 100% OPEN will be shown on the display indicating the control output value. Pressing the / keys change the count on the display. Pressing the key increases the displayed value, while pressing the key decreases the displayed value. The general exhaust air damper or VAV box should change (modulate) as the number changes. WARNING: The CONTROL GX# function overrides the AOC control signal. Adequate general exhaust air volume and room balance will NOT be maintained while in this item. SUPPLY FLOW MENU SP1 KFACTOR SP2 KFACTOR EXHAUST FLOW MENU EX1 KFACTOR EX2 KFACTOR The SP# K FACTOR menu items set the K factor for the flow probe being used. The flow signal is multiplied by the SP# K FACTOR so that the flow measurement matches the actual flow, usually determined with a pitot tube traverse. The EX# K FACTOR menu items set the K factor for the flow probe being used. The flow signal is multiplied by the EX# K FACTOR so that the flow measurement matches the actual flow, usually determined with a pitot tube traverse. Range 0.1 10.0 (1.0) Range 0.1 10.0 (1.0) PRESSURE MENU ST XDCR OUT The ST XDCR OUT menu items are used to set the transducer output voltage range for the transducer measuring the static pressure. NOTE: For transducers with a 210V output, the 010V setting can be used. Similarly, use the 05V setting for transducers with a 15V output. Range 05 V / 010 V 010 V 9
PRESSURE MENU ST MAX PRESS The ST MAX PRESS menu items are used to set the upper limit of the pressure transducer measuring the static pressure. Range 0.1 to 10 H 2 O (25 to 2500 Pa) 2.0 in H 2 O (500 Pa) ST ZERO The ST ZERO items establish the static pressure transducer zero pressure point. A zero point needs to be established in order to obtain a correct static pressure measurement. ST SPAN The ST SPAN items are used to match or calibrate the Model 8682 KET static pressure sensor. RESET CAL The RESET CAL menu item clears out the calibration of the pressure transducer by resetting the ST ZERO. 10
Deleted Software Menu s The following items have been replaced or eliminated in the Model 8682KET: SETPOINTS SETPOINT REM SETPOINT COOLING FLOW UNOCCUPY SET MIN OFFSET MAX OFFSET ALARM LOW ALARM HIGH ALARM REM LOW ALM REM HIGH ALM ALARM DELAY CONFIGURE CALIBRATION SENSOR SPAN ELEVATION TEMP CAL CONTROL SPEED SENSITIVITY SUP CONT DIR EXH CONT DIR TEMP DIR REHEAT SIG Kc VALUE Ti VALUE Kc OFFSET TEMP DB TEMP TR TEMP TI SYSTEM FLOW TOT SUP FLOW TOT EXH FLOW OFFSET VALUE SUP SETPOINT EXH SETPOINT FLOW CHECK SUP3 FLOW IN SUP4 FLOW IN HD1 FLOW IN HD2 FLOW IN HD3 FLOW IN HD4 FLOW IN HD5 FLOW IN HD6 FLOW IN HD7 FLOW IN DIAGNOSTICS CONTROL SUP CONTROL EXH CONTROL TEMP SENSOR INPUT SENSOR STAT OCCUPANT SWT REMOTE SWT LOW ALM REL HIGH ALM REL PRESS AOUT SUPPLY AOUT EXHAUST AOUT INPUT CHECK SUP 3 SUP 4 HOOD1 HOOD2 HOOD3 HOOD4 HOOD5 HOOD6 HOOD7 SUPPLY FLOW SP3 DCT AREA SP4 DCT AREA SP3 FLO ZERO SP4 FLO ZERO SP3 LOW CAL SP3 HIGH CAL SP4 LOW CAL SP4 HIGH CAL EXHAUST FLOW HOOD FLOW HD1 LOW CAL HD1 HIGH CAL HD2 LOW CAL HD2 HIGH CAL HD3 LOW CAL HD3 HIGH CAL HD4 LOW CAL HD4 HIGH CAL HD5 LOW CAL HD5 HIGH CAL HD6 LOW CAL HD6 HIGH CAL HD7 LOW CAL HD7 HIGH CAL MIN HD1 FLOW MIN HD2 FLOW MIN HD3 FLOW MIN HD4 FLOW MIN HD5 FLOW MIN HD6 FLOW MIN HD7 FLOW RESET CAL Figure 2: Deleted Menu s Model 8682KET Controller 11
Modbus Communications Modbus communications are installed in the Model 8682KET offset room pressure controllers. This document provides the technical information needed to communicate between the host DDC system and the Model 8682KET units. This document assumes the programmer is familiar with Modbus protocol. Further technical assistance is available from TSI if your question is related to TSI interfacing to a DDC system. If you need further information regarding Modbus programming in general, please contact: Modicon Incorporated (a division of SchneiderElectric) One High Street North Andover, MA 01845 Phone (800) 4685342 The Modbus protocol utilizes the RTU format for data transfer and Error Checking. Check the Modicon Modbus Protocol Reference Guide (PIMbus300) for more information on CRC generation and message structures. The messages are sent at 9600 baud with 1 start bit, 8 data bits, and 2 stop bits. Do not use the parity bit. The system is set up as a master slave network. The TSI units act as slaves and respond to messages when their correct address is polled. Blocks of data can be written or read from each device. Using a block format will speed up the time for the data transfer. The size of the blocks is limited to 20 bytes. This means the maximum message length that can be transferred is 20 bytes. The typical response time of the device is around 0.05 seconds with a maximum of 0.1 seconds. Unique to TSI The list of variable addresses shown below skips some numbers in the sequence due to internal Model 8682KET functions. This information is not useful to the DDC system and is therefore deleted. Skipping numbers in the sequence will not cause any communication problems. All variables are outputted in English units: ft/min, CFM, or inches H 2 0. Modbus Variables These variables can be read using Modbus command 03 Read Holding Registers. They can be written to using Modbus command 16 Preset Multiple Regs. Many of these variables are the same menu items that are configured from the SUREFLOW keypad. The calibration and control items are not accessible from the DDC system. This is for safety reasons, since each room is individually setup for maximum performance. 12
Variable Address 8682KET Variable List Variable Name Input Provided to Master System Software Version 1 Current software version 1.00 = 100 Controller Type 2 Controller model number 8682 Status Index Static Pressure 3 5 Integer DDC system receives Status of SUREFLOW device 0 Normal 1 Dim Data Error 2 Alarm = Low Pressure 3 Alarm = High Pressure 4 Alarm = Min Supply 5 Alarm = Max Exhaust 7 Data Error 8 Cal Error 9 Emergency Mode? Alarm = Min Exhaust? Alarm = Min Exhaust1? Alarm = Min Exhaust2? Alarm = Max Supply? Alarm = Low Static? Alarm = High Static Exhaust duct static pressure Displayed in inches H 2 O. Host DDC system must divide value by 100,000 to report pressure correctly. Total Supply Flow Total supply into laboratory 6 Rate Total Exhaust Flow Total exhaust out of laboratory 7 Rate Supply Flow 9 Current supply setpoint Displayed in CFM Exhaust Flow Current general exhaust setpoint Displayed in CFM 10 Supply1 Flow Rate Flow (CFM) measured by the supply 1 27 duct flow station Supply2 Flow Rate Flow (CFM) measured by the supply 2 28 duct flow station Exhaust1 Flow Rate Flow measured by flow station 29 connected to exhaust 1 input. Exhaust2 Flow Rate Flow measured by flow station 30 connected to exhaust 2 input. Emergency Mode Emergency mode control 0 Leave emergency mode 38 1 Enter emergency mode Supply1 Control Control output value 0 100% OPEN 50 Output Supply2 Control Control output value 0 100% OPEN 51 Output General Exhaust1 Control output value 0 100% OPEN Analog Control 52 Output General Exhaust2 Control output value 0 100% OPEN Analog Control 53 Output Static Pressure Control output value 0 100% OPEN 54 Control Output 13
Variable Name Static Pressure Variable Address 55 Input Provided to Master Integer DDC system System receives Exhaust duct static pressure setpoint Displayed in inches H 2 O. Host DDC system must divide value by 100,000 to report pressure correctly. Min Vent 56 Minimum flow setpoint for ventilation. Max Supply 57 Maximum supply setpoint Offset 58 Offset setpoint Maximum Flo Set 59 Maximum exhaust flow setpoint Displayed in CFM Min Supply Alarm 62 Minimum supply flow alarm Min Exhaust Alarm 63 Minimum total exhaust flow alarm Min Exhaust1 Alarm 64 Minimum exhaust1 flow alarm Min Exhaust2 Alarm 65 Minimum exhaust2 flow alarm Max Supply Alarm 66 Maximum total supply flow alarm Max Exhaust Alarm 67 Maximum general exhaust alarm Units Min Sup1 Damper Min Sup2 Damper Min Exh1 Damper Min Exh2 Damper Max Sup1 Damper Max Sup2 Damper Max Exh1 Damper Max Exh2 Damper Min Sup1 Flow Min Sup2 Flow Min Exh1 Flow Min Exh2 Flow Max Sup1 Flow Max Sup2 Flow Max Exh1 Flow Max Exh2 Flow 73 139 140 142 143 144 145 147 148 149 150 151 152 153 154 155 156 Current pressure units displayed 0 Feet per minute 1 meters per second 2 inches of H2O 3 Pascal Minimum Supply 1 Damper setpoint Minimum Supply 2 Damper setpoint Minimum Exhaust 1 Damper setpoint Minimum Exhaust 2 Damper setpoint Maximum Supply 1 Damper setpoint Maximum Supply 2 Damper setpoint Maximum Exhaust 1 Damper setpoint Maximum Exhaust 2 Damper setpoint Minimum Supply 1 flow setpoint Minimum Supply 2 flow setpoint Minimum Exhaust 1 flow setpoint Minimum Exhaust 2 flow setpoint Maximum Supply 1 flow setpoint Maximum Supply 2 flow setpoint Maximum Exhaust 1 flow setpoint Maximum Exhaust 2 flow setpoint 14
EXAMPLE of 16 (10 Hex) Preset Multiple Regs function format: This example changes the set point to 100 ft/min. QUERY RESPONSE Field Name (Hex) Field Name (Hex) Slave Address 01 Slave Address 01 Function 10 Function 10 Starting Address Hi 00 Starting Address Hi 00 Starting Address Lo 04 Starting Address Lo 04 No. Of Registers Hi 00 No. of Registers Hi 00 No. Of Registers Lo 01 No. of Registers Lo 01 Data Value (High) 00 Error Check (CRC) Data Value (Low) 64 Error Check (CRC) Example of 03 Read Holding Registers function format: This example reads the minimum ventilation setpoint and the minimum temperature setpoint. QUERY RESPONSE Field Name (Hex) Field Name (Hex) Slave Address 01 Slave Address 01 Function 03 Function 03 Starting Address Hi 00 Byte Count 04 Starting Address Lo 05 Data Hi 03 No. Of Registers Hi 00 Data Lo 8E (1000 CFM) No. Of Registers Lo 02 Data Hi 04 Error Check (CRC) Data Lo B0 (1200 CFM) Error Check (CRC) 15
Wiring Information DIM PIN # Input / Output / Communication 1, 2 Input 24 VAC to power Digital Interface Module (DIM). NOTE: 24 VAC becomes polarized when connected to DIM. 312 No Connection No function. 13, 14 Output Low and High Static Pressure Alarm relay N.C., opens in alarm condition 15, 16 Communications RS485 communications; DIM to Adaptive Offset Controller (AOC) 1722 No Connection No function. 23, 24 Input Non powered switch input N.O. contacts for Emergency input NOTE: Close contacts to enable Emergency Mode. 25, 26 Output Minimum total exhaust flow, Minimum Exhaust 1 flow, and Minimum Exhaust 2 flow alarm relay N.C., opens in alarm condition AOC PIN # Input / Output / Communication 14 No Connection No function. 5 8 Input 0 10 VDC flow station signal Total exhaust = EXH1 and EXH2. 920 No Connection No function. 21, 22 No Connection No function. 23, 24 No Connection No function. 25, 26 Input 0 10 VDC flow station signal Supply air 1. 27, 28 Input 0 10 VDC flow station signal Supply air 2. 29, 30 No Connection No function 31, 32 Input 0 10 VDC input signal Exhaust duct static pressure 33, 34 Input 24 VAC to power Adaptive Offset Controller (AOC). NOTE: 24 VAC becomes polarized when connected to AOC. 35 Ground Earth ground 36, 37 Output 24 VAC Power for DIM. 38, 39 Communications RS485 communications; AOC to building management system (Modbus or N2) 40, 41 Communications RS485 communications; AOC to DIM 42, 43 Communications Not used 44, 45 Output 0 10 VDC, Supply 1 control signal. 46, 47 Output 0 10 VDC, Supply 2 control signal. 48, 49 Output 0 10 VDC, General exhaust 1 control signal 50, 51 Output 0 10 VDC, General exhaust 2 control signal 52, 53 Output 0 10 VDC, Exhaust static control signal 54, 55 Output Minimum and Maximum Supply Flow Alarm Relay N.C., opens in alarm condition. 56, 57 Output Max Exhaust Flow alarm relay N.C., opens in alarm condition. WARNING: The wiring diagram shows polarity on many pairs of pins: ±, H / N, A / B. Damage to the DIM and AOC may occur if polarity is not observed. 16
Wiring Diagram 23 24 25 26 + 1 2 + 3 4 SUPPLY 3 DIGITAL INPUT 1 33 + POWER (24VAC) 34 EARTH GND 35 + 5 6 FUME HOOD EX. 1 + 7 FUME HOOD EXHAUST 2 8 + 9 FUME HOOD EXHAUST 3 10 + 11 FUME HOOD EXHAUST 4 12 + 13 FUME HOOD EXHAUST 5 14 + 15 FUME HOOD EXHAUST 6 16 + 17 FUME HOOD EXHAUST 7 18 INTERFACE MODULE 36 + POWER (24 VAC) 37 38 + RS485 PORT 39 40 + D.I.M. COMM 41 42 + LONWORKS PORT 43 + 19 SENSOR SIGNAL IN 20 + 21 AUX. EXHAUST 1 22 + 23 AUX. EXHAUST 2 24 + 25 SUPPLY 1 26 + 27 SUPPLY 2 28 REHEAT CONTROL OUTPUT 44 + 45 46 + SUPPLY CONTROL OUTPUT 47 48 + AUX. EXHAUST CONTROL OUTPUT 49 ANALOG OUTPUT 1 50 + 51 52 + ANALOG OUTPUT 2 53 54 + DIGITAL ALARM OUTPUT 1 55 56 + DIGITAL ALARM OUTPUT 2 57 + 29 TEMPERATURE RTD 30 + 31 SUPPLY 4 32 TSI Incorporated 500 Cardigan Road, Shoreview, MN 55126 U.S.A USA Tel: +1 800 874 2811 Email: answers@tsi.com Website: www.tsi.com UK Tel: +44 149 4 459200 Email: tsiuk@tsi.com Website: www.tsiinc.co.uk France Tel: +33 491 11 87 64 Email: tsifrance@tsi.com Website: www.tsiinc.fr Germany Tel: +49 241 523030 Email: tsigmbh@tsi.com Website: www.tsiinc.de India Tel: +91 80 41132470 Email: tsiindia@tsi.com China Tel: +86 10 8251 6588 Email: tsibeijing@tsi.com Singapore Tel: +65 6595 6388 Email: tsisingapore@tsi.com Contact your local TSI Distributor or visit our website www.tsi.com for more detailed specifications. 10/7/2011 Copyright 2010 by TSI Incorporated Printed in U.S.A.