Model Number: M21E-24-DIN Description: The product is a loop powered device which controls an unsupervised dual pole output channel suitable to manage 24VAC loads. The M21E-24-DIN is micro-controller operated, includes solid state short circuit isolator and it is compatible with 2/5 series and Advanced protocols. Output functions are related to specific device address within the 1-99 range, selected by means of the code wheel switches. Isolator circuit operates automatically and prevents the product from not working regardless of whether the short circuit occurs on the incoming or outgoing loop wiring; isolation state is signalled by switching on the LED yellow steadily, see Reference Table for additional information and recommendations. The device is designed to be mounted onto a standard "Top Hat" style 35mm x 7.5mm DIN rail; address switches and tricolour LED (red, yellow, green) are both located on the front side. Appropriate communication sequences between the product and the Fire Alarm Control Panel (FACP) (see Reference Table for more information) allow the panel itself to control the output and set the LED configuration. The advanced protocol extension contains a rapid alarm or fault detection feature which enables any device to signal the control panel when the device detects an alarm or fault condition. The alarm/fault condition represents a condition in the device which has been defined to require attention from the panel. This signal can be generated by any device where an alarm or fault condition occurs. This feature is configurable on customer request. The external EEPROM can be read or written by means of advanced protocol commands. Not all of the bytes are read and/or write accessible through the 2 series advanced protocol (refer to Parameter Table). Four bytes in the EEPROM are used as a serial number, which can be read at panel start-up to detect double addresses. The digital units corresponding to PW4 are multiples of 16 microseconds, i.e. 3 s corresponds to 19 digital units, or 9 s to 56 digital units (for a device with 3 s time base). Similarly they are multiples of 8 s for a 15 s PW1 time base product and 24 s with a 45 s PW1 time base product. Reference Table Drawing no. S61-491-xxx S61-432- S-26- Title ADVANCED PROTOCOL SPECIFICATION 5 SERIES PROTOCOL DESIGN GUIDE M21E-24-DIN PRODUCT SPECIFICATIONS 1 of 12 LIFE SAFETY
Output Channel operation (5 series protocol) The output module features a double pole contact relay, with contacts rated at 25VAC, and a couple of terminals for ground connections. The output relay is normally de-energised. It is switched on by command from the FACP. Once on, it remains latched in the on state until a reset command is issued from the FACP. This output is not intended for applications which require wiring supervision. WARNING: the contact is factory set to the off position but, due to either shipment or installation handling, it might travel to the on position. Output channel status should be checked before powering any circuit served by the output channel itself. LED product operation LED is controlled both by FACP and short circuit isolator (5 Series mode only). 5 Series mode is left once the Reset Power On command is received. In case of conflicts in 5 Series mode, short circuit isolator has higher priority than FACP. LED control (5 series mode) Panel Command LED off (isolator normal) LED off (isolator open) LED on (isolator normal) LED on (isolator open) LED blink (isolator normal) LED blink (isolator open) LED state off yellow on green on yellow on green blink yellow on Note: EEPROM error is a fault condition Rotary switch selection A number of actions is performed internally by the device, each time the rotary switch address is changed. They are summarized below: 1. set 99 as maximum address available in 5 Series mode 2. if device is not in internal fault state, set sub-address = 255 3. enable answer to address in 5 Series mode if device address greater than 99 4. let the device change the LED color to yellow for faults or isolator active 5. disable latches and interrupts. Pending interrupts and latches are not cleared 6. respond to Read Trouble Latch Tens and Read Trouble Latch Units 7. send the startup interrupt (if bit in Device Configuration set) 2 of 12 LIFE SAFETY
LED control (advanced protocol mode) The LED state is yellow blinking in case of EEPROM error. The FACP controls the LED state after issuing a Reset Power On command. On Read Presence for sensors and modules with its tens address, this device staggers LED activations based on its units address. This spreads current loads over a longer time to prevent excessive current consumption. The nominal time delay step is 16ms x units, for example 32ms when units = 2. This device responds only to Read Presence for modules with its tens address. Terminal Layout 1. Loop -, output 2. Loop +, switched output 3. Loop -, input 4. Loop +, input 5. Loop +, not switched output (terminal pos. 5 is internally connected to terminal pos. 4) 6. N/U 7. Relay 1, normally open 8. Relay 2, normally closed 9. Ground 1. Ground (connected internally to 9) 11. Relay 2, normally closed 12. Relay 1, normally open Communication Specifications Specification Typical Min Max Units Comments Data Bit High Voltage Range (1) 5. 4.5 5.5 V Recommended Panel Design Range Data Bit Low Voltage Range (1).5 V Recommended Panel Design Range Bit Interval high Time (24V) 25 1 s Bits 1 19: See Figure 1 Bit Interval low Time (V,5V) 25 1 s Bits 1 19: See Figure 1 Software Reset Time 4 ms CLIP 5 ms Advanced Protocol Interbyte time 5 ms Advanced Protocol Extended interbyte time 5 ms AP commands 131, 132 Extended software reset 2 ms AP command 3, Write Parameter 25 ms AP command 1, Init Device Pulse width time from device to panel 15 35 s 1) All specifications refer to conditions at the module 3 of 12 LIFE SAFETY
Electrical Specifications General Specification Typical Min Max Units Comments 24 15 28 V With continuous and instantaneous switching currents 1A Input voltage 29 V With continuous and instantaneous switching currents 9mA 24 15 3 V Isolator not used loop+ output connected to terminal 5 Output Driver Current (If) 58 4 7 ma 2/5 Protocol (See Figure 2) Initial Output Driver Current (Io) 16 85 26 ma See Figure 2 Output Driver Transition Time 55 3 17 μs See Figure 2 Output Driver Response Time TBD μs Standby current @ 24V 21 36 275 445 375 5.8 4.9 6.6 LED current @ 24V ma 7.8 6.5 8.8 Supply Voltage to Guarantee LED On 19.5 V Relay Activation/Deactivation current 63 48 76 ma μa μa μa Time between start of any answer window to start of current draw No communication Communication w/ LED blink enabled, called once every 5s Advanced Protocol: Read Presence sequence period 16s, LED blink period 8s Green Yellow (green and red) Current that energizes coil to switch relay. Relay is energized only when FACP command changes present relay status Relay Activation/Deactivation time 12 ms Coil energization time to switch relay Initial Power Up Time 3 s Reset time 1. 7. Power Up Current @ 24V 4 μa Added, for 3s max time (due to EEPROM read) 4 of 12 LIFE SAFETY
Relay Specifications Specification Typical Min Max Units Comments Contact Rating 5A 3VDC 5A 25VAC at 25 C 5%RH Life Time 1 5 operations Activation Time 12 ms Relay set pulse width Deactivation Time 12 ms Relay reset pulse width Electrical Specifications Isolator and terminal block additional resistance Specification Typical Min Max Units Comments Isolation current 15 ma At 24V, current flowing through the short circuit Fault detection delay (t x ) 1 4 ms Time required for isolator to open switches if voltage supply below the switch opening threshold Switch opening threshold 6 5 7 V The switches will open if the voltage to the module falls below this value Line restoration voltage 6 5 7 V Line must rise above this voltage to restore the isolated devices Initial power up time (t y ) 3 4 ms Time for switches to become fully on 8 125 Switch on resistance 15 16 1 25 m 1 25 Resistance between terminals 2 and 4 at 24V 1A Resistance between terminals 2 and 4 at 15V 1A Resistance between terminals 4 and 5 Resistance between terminals 1 and 3 (see Terminal Conn Table) Switch off resistance 2.2 k Resistance between terminals 2 and 4 when short circuit is present or voltage supply below line restoration voltage Maximum continuous current 1 A Switch closed. Input voltage 28V.9 A Switch closed. Input voltage 29V Maximum instantaneous 1 A Input voltage 28V switch current.9 A Input voltage 29V 5 of 12 LIFE SAFETY
Because a partial short circuit resistance is not always enough to pull the line below 5V (minimum switching threshold) an appropriate panel monitor function is required. The panel can recognise a partial short circuit by the following methods: Monitoring the line voltage at the end of the loop Monitoring if a device goes missing Looking for extra current during the 5V address sequence If a partial short circuit condition is determined to be present the panel should produce a reset pulse to open the isolators (> 4ms) so that the switch off resistance is put between the line positive input and output. With this procedure a partial short circuit is properly is managed. The FACP must restore the devices to the correct condition that was present before the short circuit was determined. The MOSFET used for short circuit isolation on this product can be controlled (command 11 bit 6,5=1) via a pin from the microcontroller to the gate of the MOSFET. Automatic control of the isolator occurs by the voltage monitoring circuit in the product, which also controls the gate of the MOSFET. The status of the isolator is provided by reading the control point at the gate of the MOSFET and does not always represent the precise electronic status of the isolator. When the Read Input Value command is used to read the isolator status, please pay attention to the notes below: When the isolators are controlled by the device at start-up or after a command 11 with bit 6,5=11 Bit 7 = means isolators are open or are opening with the specified time delay (t x ) after the detection of a short circuit or during loop start-up Bit 7 = 1 means isolators are closed or are closing with the specified time delay (t y ) after the detection of the end of a short circuit or during loop start-up or after the release of the isolator open control by the panel (command to return to automatic control given by the panel and no short circuit) When the isolators are controlled by the panel after a command 11 with bit 6,5=1 Bit 7 = until control is given again to the device by the command 11 with bit 6,5=11 6 of 12 LIFE SAFETY
Environmental specifications Specification Typical Min Max Units Comments Installation temperature -2 +6 C Installation humidity 5 95 %RH Non-condensing IP Rating 3 Storage temperature -3 +6 C Mechanical Specifications Specification Typical Min Max Units Comments Wire gauge for connector screw terminals 2.5 mm 2 Height 127 mm Length 76 mm Width 37 mm Terminal blocks add 11mm (cables not included) Fixing centres --- mm DIN rail mounting Weight 14 g 7 of 12 LIFE SAFETY
FIG. 1 - ADVANCED PROTOCOL GENERAL HEADER FIG. 2-5mA OUTPUT DRIVER SIGNALLING WAVEFORM FOR CURRENT SINK Io (ma) If (ma) I (ma) t (µs) Transition Time 8 of 12 LIFE SAFETY
PARAMETER TABLE NR. 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 21 22 23 SUB-ADDRESS SUB-ADDRESS 127 PARAMETER DFLT NR. PARAMETER Implementation ID (*) 1 1 Latch Enable Register Type ID (*) 129 2 Latch Mode Register OEM ID (*) OEM Nr. 3 Rising Interrupt Enable Register Firmware Revision (*) Rev. Nr. 4 Falling Interrupt Enable Register User Checksum (*) Chksum 5 Alarm Hysteresis Value Configuration Status (*) 1 6 Trouble Hysteresis Value Device Configuration 1 7 Threshold Latch Enable Register Latch Mode Register Rising Interrupt Enable Register Falling Interrupt Enable Register Alarm Hysteresis Value Trouble Hysteresis Value Threshold 255 Threshold 1 255 Threshold 2 255 Threshold 3 255 Group code 1 Group code 2 Group code 3 Group code 4 User Byte 1 User Byte 2 DFLT 255 * = read only Note: factory values are configurable on customer request SUB-ADDRESS TABLE INPUT VALUES NR. DESCRIPTION DIRECTION NR. DESCRIPTION MIN TYP MAX System Input System normal, default 5 127 Isolators Input Internal fault 1 5 129,139 LED Output Power up special value 255 14 Relay Output 127 Isolators controlled by device: closed, default 224 Isolators controlled by device: open 96 Note: each input is initialized at start-up and after command 1 with the default value 9 of 12 LIFE SAFETY
DIRECT/GROUP FUNCTION SUBADDRESS DATA/DIRECTION DATA DESCRIPTION COMMAND ID Expansion Message ignored 1 Set Output 129 2 bytes - panel to device (data byte repeated) 14 Turn Relay Off 1 Turn Relay On 2 Unused Unused command 3 Write Parameter, 127 2 bytes - panel to device Parameter Number:, 127 Write specified parameter (See Parameter Table for details) Data: 255 4 Read Address by NO 4 bytes - panel to device $... $FF.FF.FF.FF Transmit Address of factory programmed Serial Number Serial Number 1 byte - device to panel 159 Decimal address returned 5 Disable Answer NO 4 bytes - panel to device $... $FF.FF.FF.FF Disable any answer of factory programmed Serial Number by Serial Number 6 Read Address Message ignored 7 Force Device NO no data Force device update (factory use only) Update 8 Synchronize Message ignored 9 Reset Power On NO no data Clears power-on condition in devices 1 Initialize Device NO no data Re-read the whole non-volatile memory and initialize RAM variables (*) 11 Control Isolator NO 1 byte - panel to device 255 Specific command is in data byte- Open, Close, etc. (*) This device reads part of the external memory at start-up. Send command 1 to initialize all registers in Advanced Protocol mode 1 4 7 2 5 8 Turn LED Off Pulse Red LED on communication (Blinking) Pulse Green LED on communication (Blinking) Pulse Yellow LED on communication (Blinking) Turn Red LED On Turn Green LED On Turn Yellow LED On 1 of 12 LIFE SAFETY
DIRECT COMMAND FUNCTION SUBADDRESS ID 129 Read Output Status 129 DATA/DIRECTION DATA LIMITS DESCRIPTION 1 byte - device to panel 1 4 7 2 5 8 LED Off Red LED Pulsing on communication (Blinking) Green LED Pulsing on communication (Blinking) Yellow LED Pulsing on communication (Blinking) Red LED On Green LED On Yellow LED On 14 13 Read Condition Latch (system) 127 (isolator state) Relay Off 1 Relay On 1 byte - device to panel 255 Read Condition Latch value 131 Read Parameter, 1, 127 1 byte - panel to device 1 byte - device to panel Parameter Number:, 127 Data: 255 Read specified device parameter (See Parameter Table) 132 Read Multiple Parameter, 1, 127 N bytes - device to panel 255 Read all parameters from specified sub-address (See Parameter Table) 133 Read Serial Number by Address NO 4 bytes - device to panel $... $FF.FF.FF.FF Transmit factory programmed Serial Number for device addressed 134 Read Input value, 127 1 byte - device to panel 255 Transmit processed value or sensing element raw values. If there is an internal error e.g. memory checksum error, then sub-address will be 1 135 Read Multiple Input Values NO N bytes - device to panel 255 Transmit all processed value and sensing element raw values. (See Parameter Table) 136 Read Multiple Condition Latches NO N bytes - device to panel 255 Transmit all sub-addresses Condition Latches (See Parameter Table) 11 of 12 LIFE SAFETY
SPECIAL COMMANDS SUBADDRESS ID DATA/DIRECTION DATA LIMITS DESCRIPTION Read Alarm Latch Units NO 1 bits - device to panel 123 Devices with an alarm condition that match the specified tens address sink current in bits 9- corresponding to their units address Read Alarm Latch Tens NO 1 bits - device to panel 1 bits - device to panel (only 16 used) 123 18 Devices with an alarm condition sink current in bits 15- corresponding to their tens address Read Trouble Latch Units NO 1 bits - device to panel 123 Devices with an trouble or power-on condition that match the specified tens address sink current in bits 9- corresponding to their units address Read Trouble Latch Tens NO 1 bits - device to panel 1 bits - device to panel (only 16 used) 123 18 Devices with an interrupt sink current in bits 15- corresponding to their tens address Read Presence NO 1 bits - device to panel 123 All installed devices that match the specified the tens address sink current in bits 9- corresponding to their units address. Null Message NO No data Message only allows for Interrupt Interval to be used 12 of 12 LIFE SAFETY