Thermocable ProReact EN Analogue - Control Unit Wiring and Interfaces; Wiring, Remote Reset, and Modbus; Hazardous Area Installation Considerations

Page 17 of 29 Revision 3.3 Feb 2021
ProReact EN Analogue Installation Manual
Document Ref. PACC-MAN
Control Unit Wiring
Remote Reset
Modbus RS-485 RTU/ASCII
Hazardous Area Installation
The ProReact EN Analogue Composite Control Unit is designed to be
connected to any standard re alarm control panel or addressable monitor
module. It is intended to be powered via the 24Vdc switched power output
which is interrupted when the control panel is reset or via a battery-
backed EN54-4 power supply for EN54 compliant installations or UL listed
power supply with a UTRZ category code for UL compliant installations.
The remote reset function allows the ProReact EN Analogue Composite
Control Unit to be reset from a remote point. In order to trigger a reset
supply 5 - 28Vdc (approx 2mA max) for at least 3s to the remote reset
input.
The ProReact EN Analogue Composite Control Unit includes a Modbus
RS-485 RTU/ASCII output. This can be used to read back additional
information from the ProReact EN Analogue system as well as the fault
and alarm status. For example, by reading the sensor cable ambient
temperature via the Modbus output, it is possible to use the ProReact
EN Analogue Composite Control Unit and Sensor Cable as a distributed
temperature sensor.
For installations in hazardous areas please refer to the ProReact Analogue
Hazardous Area installation instructions for suitable recommendations
and advice.
Figure 9: PCB Wiring Diagram
20 – 30Vdc
-
+
Prealarm
Relay
Alarm
Relay
Fault
Output
USB connection
Mini-B
Remote
Reset
5-28Vdc
>3s
PREALARM ALARM FAULT POWER
Clear
Clear
Shield
Red
Sensor
Cable
Power
NC C NO NC C NO
+
-
-
+
Modbus
RTU/ASCII
RS-485
+
-
SELECT
SET