Multipoint commercial heat-tracing control system Product Overview The DigiTrace ACCS-30 is a multipoint electronic control and monitoring system for heat-tracing used in commercial freeze protection and flow maintenance applications. The DigiTrace ACCS-30 system can control up to 260 circuits with multiple networked ACCS- PCM-5 panels. The panel can directly control up to 5 individual heat-tracing circuits using electromechanical relays rated at 30 A up to 277 V. Four Resistance Temperature Detector () sensor inputs can be assigned for each heating cable circuit providing a variety of temperature control, monitoring, and alarm options. Using up to 16 DigiTrace RMM2s, an additional 128 temperature inputs can be supported for a maximum of 388 temperature inputs for the ACCS-30 system. Control The DigiTrace ACCS-30 is pre-programmed with parameters for commercial hot water temperature maintenance, pipe freeze protection, flow maintenance, freezer frost heave prevention and floor heating applications. The pre-programmed application settings significantly simplify setting up multiple heating cable circuits. DigiTrace ACCS-30 can be configured for On/Off or ambient sensing and, for HWAT, timed duty cycle control modes based on the application. The DigiTrace ACCS-30 measures temperatures with 3-wire, 100-ohm platinum s connected directly to the unit, or through optional Remote Monitoring Modules (RMM2). Each RMM2 accepts up to eight s. The RMM2s are typically located near the desired measurement location (s). Multiple RMM2s are networked over a single cable to the DigiTrace ACCS-30, significantly reducing the cost of field wiring. The built-in calendar function for hot water temperature maintenance, floor heating and greasy waste applications provides flexible timed set points providing energy savings from your system. Monitoring The DigiTrace ACCS-30 can measure up to12 control parameters including ground fault, temperature, and current variables to ensure system integrity. Configurable alarm settings provide options for local or remote alarms. The system can be set to periodically check for heating cable faults, alerting maintenance personnel of a pending heat tracing problem. This helps avoid costly downtime. Dry contact relays are provided for alarm annunciation back to a Distributed Control System (DCS). Ground-Fault Protection National electrical codes require groundfault equipment protection on all heat tracing circuits. Heat tracing circuits equipped with DigiTrace ACCS-30 controllers do not require additional ground-fault detection equipment, simplifying installation and reducing costs. Installation The DigiTrace ACCS-30 system is configured with the User Interface Terminal () that has an LCD color display with touchscreen technology. The provides an easy user interface for programming without keyboards or cryptic labels. The ACCS-30 comes in a NEMA-12 enclosure suitable for non-hazardous, indoor locations and comes complete with wiring terminals and an alarm signal light. Communications DigiTrace ACCS-30 units support the Mod- Bus protocol and are available with an RS-232/ or 10/100Base-T Ethernet communication interface. Complete System The DigiTrace ACCS-30 is supplied as a complete modular system, ready for field connections to power wiring and temperature sensor input, reducing the cost of heating cable installation. Heat-tracing system ACCS-30 System H58261 04/08 (800) 545-6258 www.tycothermal.com 1 of 6
ACCS-30 System Multipoint temperature control with groundfault/current/temperature monitoring when used with the The DigiTrace ACCS-30 is a multipoint electronic control, monitoring, and power relay system for heat-tracing used in commercial heat-tracing applications. The system consists of a Digi- Trace and up to 52 power control panels. DigiTrace RMM2 heat-tracing remote monitoring modules may also be used with the ACCS-30 system to expand the number of temperature measurement points. The DigiTrace ACCS-30 provides the following alarming features per control point. High/low temperature Ground fault High/low current fault failure The DigiTrace ACCS-30 provides ground-fault monitoring and protection for every heat-tracing circuit and fulfills the requirements of national electrical codes. ACCS-30: Heating Cable Application Programming Summary Control Mode Functions Application Hot Water Temperature Maintenance Floor Heating Heating cable HWAT RaySol Design wizard Temperature set points Schedule Heating cable: Y2 or R2 Voltage: 208, 204 or 277V Ambient temperature Pipe type: Plastic or metal Set point mode: Constant Variable Variable: Economy Off Heat Cycle (R2 only) Set point calendar with: 48 1/2-hr time blocks/day 7 days/week Calendar copy function MI heating cable QuickNet Greasy Waste Disposal Flow Maintenance Pipe Freeze Protection Fuel Oil Flow Maintenance Freezer Frost Heave Prevention XL-Trace XL-Trace XL-Trace RaySol MI heating cable N/A N/A N/A N/A N/A Variable: Economy Off Set point calendar with: 48 1/2-hr time blocks/day 7 days/week Calendar copy function Variable: Economy Off Set point calendar with: 48 1/2-hr time blocks/day 7 days/week Calendar copy function Control Mode Preset power duty cycle Floor sensor only Line sensor only Ambient or line sensor Line monitor and alarm only Floor control, monitor and alarm Line control, monitor and alarm N/A N/A N/A Ambient or line control Line monitor and alarm Ambient or line sensor Ambient or line control Line monitor and alarm Floor sensor only Floor control, monitor and alarm 2 of 6 www.tycothermal.com (800) 545-6258 H58261 04/08
(User Interface Terminal) The DigiTrace ACCS-30 User Interface Terminals is a panel-mounted display for use with the ACCS panel. The has a 5 ¾ inch x 3 ¼ inch (14.61 cm X 8.26 cm) LCD color display with touch-screen technology, and provides an easy user interface for programming without keyboards or cryptic labels. It has, RS-232, or 10/100Base-T Ethernet communications ports that allow communication with the external Distributed Control Systems. A USB interface is included for easy configuration and firmware upgrades. The is designed for use on indoor or nonhazardous location installations and is rated for NEMA 12 environments. General Approvals Area of Use Ordinary, Indoors (NEMA 12, IP54) Supply Voltage 100 120 Vac 4/+10%, 1 A max. fused, 50/60 Hz Terminal Block Weidmuller terminal block #22 #10 AWG Operating Temperature 40 F to 150 F ( 40 C to 65 C) EMC Immunity Industrial Emission Commercial / Light Industrial Vibration Unit tested to IEC-60068-2-6 Shock Unit tested to IEC-60068-2-27 Dimensions 15" W X 11.8" H X 6.1" D (381 mm W X 300 mm H X 155 mm D) Alarm Outputs Relay Outputs Three relay outputs, Form C contacts, switching loads up to 277 Vac/3 A. Relays may be assigned for alarm outputs. Network Connection Local Port/Remote /RS-232, selectable. Port may be used to communicate with DigiTrace UIT Loader Software. RS-232 A non-isolated, RJ-11 connection Data Rate 9600 to 57600 baud 2-wire isolated Data Rate 9600 to 57600 baud Phoenix-style pluggable screw terminal connector with retaining screws Maximum number of devices 256 Fail safe design with optional termination resistors Cable not to exceed 4000 ft (1200 m). Cable to be shielded twisted pair Field Port, 2-wire isolated Data Rate 9600 baud Used to communicate with external devices, such as (ACCS-30-CRM) and RMM2 Weidmuller terminal block #22 #10 AWG Maximum cable length not to exceed 4000 ft (1200 m). Cable to be shielded twisted pair LAN 10/100 Base-T Ethernet port with Link and Activity Status LEDs USB Port USB 2.0 Host port Type A receptacle H58261 04/08 (800) 545-6258 www.tycothermal.com 3 of 6
Status LEDs Relay Field Local/Remote USB Host UIT Status LCD Display Display Touch Screen Three LEDs showing the ON/OFF Status for each relay, LED ON indicates relay is energized. Transmit and Receive activity Transmit and Receive activity Three colors showing status: Red = USB key fault Green = USB key inserted Yellow = USB in use Three colors showing system status: Green = Normal Condition Red = Fault Condition Yellow = Loading software/configuration LCD is a 6.5 inch OVGA, color TFT transflective device with integral CCFL backlight 4-wire resistive touch screen interface for user entry Power Control Panel The enclosure is rated NEMA 1 and is approved for nonhazardous indoor locations. The provides ground fault and line current sensing, alarming, switching (electromechanical relays) and inputs for five heat tracing circuits when used with the. General Approvals Supply Voltage 120 Vac ±10%,< 0.5 A max., 50/60 Hz Ambient Operating Temperature 32 F to 150 F (0 C to 65 C) Dimensions 24" W X 20" H X 6.75" D (610 mm W X 508 mm H X 171 mm D) Enclosure Rating NEMA 1 (Indoors) Humidity 0 90% non-condensing Fuse Gould TRM5 Control Contactors Rating 3-pole 30A/pole 277 Vac Type Sq D Cat. No. LC1D18G7 Quantity 5 Temperature Sensors Type 100-ohm platinum, 3-wire, α = 0.00385 ohms/ohm/ C Can be extended with a 3-conductor shielded cable of 20-ohm maximum per conductor Quantity Up to five wired directly to the ACCS-CRM board inside each panel 4 of 6 www.tycothermal.com (800) 545-6258 H58261 04/08
Communication to Type Cable Length Quantity Line Current Sensors Max current Accuracy Ground Fault Sensors Range Accuracy Connection Terminals Power Supply/Line/Load 2 wire One shielded twisted pair 4000 ft (1200 M) maximum Up to 52 panels may be connected to one 60A ± 2% of reading 10 200 ma ± 2% of reading #22 8 AWG #24 12 AWG #24 12 AWG Remote Monitoring Module (Optional) DigiTrace A Remote Monitoring Module (RMM2) is used to collect additional temperatures for control and monitoring of the heat-tracing circuit by the DigiTrace control panel, through the user interface terminal. The RMM2 accepts up to eight s that measure pipe, vessel, or ambient temperatures. Multiple RMM2s communicate with a single to provide centralized monitoring of temperatures. A single twisted-pair cable connects up to 16 RMM2s for a total monitoring capability of 128 temperatures. The RMM2s are placed near desired measurement locations. The RMM2 is available for DIN rail mount or pre-installed inside a polycarbonate NEMA-4X enclosure. Typical Configurations for the DigiTrace ACCS-30 System Individual controls with ground-fault trip/current/temperature monitoring Monitors ground-fault current and alarms/trip control contactor upon fault Monitors heater current and alarms upon low or high current conditions Monitors pipe temperature (via inputs wired back to the DigiTrace or RMM2) and alarms upon low or high current condition Pipe Heating cable H58261 04/08 (800) 545-6258 www.tycothermal.com 5 of 6
Typical Configurations for the DigiTrace ACCS-30 System (Continued) Individual controls with RMM2 for ground-fault trip/current/temperature monitoring with networked s Monitors ground-fault current and alarms/trip control contactor upon fault Monitors heater current and alarms upon low or high current conditions Monitors pipe temperature (via inputs wired back to the DigiTrace ) and alarms upon low or high current conditions Using optional RMM2 (remote monitoring modules) mounted in the field, up to 128 inputs can be added to the ACCS-30 system The RMMs allow the cables to be terminated locally and only a single twisted wire pair brought back to the panel. This results in a significant reduction in field wiring. Individual ambient control with ground-fault trip/current/temperature monitoring Monitors ground-fault current and alarms/trip control contactor upon fault Monitors heater current and alarms upon low or high current conditions Ambient Pipe Heating cable Pipe RMM2 Remote monitoring module Heating cable Multi-panel configuration Multiple panels can be ganged together for control using a single DigiTrace User Interface Terminal Communications is accomplished using protocol RMM2 Remote monitoring module Up to 260 heat trace circuits can be supported using this architecture 6 of 6 www.tycothermal.com (800) 545-6258 H58261 04/08
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