Mercury PR0091 Connections, Do not connect an earth, Input/Output Allocation Tables, Alarm Action

Mercury 6-5 Stat – Installation & User Guide

Connections

All connections are made to the back of the controller. The diagram below shows the connection detail. Inputs and outputs are assigned according to the chosen configuration. See Specification for further details on connections.

!Do not connect an earth.

Input/Output Allocation Tables

An over-ride can be achieved by switching in a fixed value resistor in parallel with the probe inputs as shown in the table below.

	5 Ch Thermostat	Description		Alarm Action	(Switched Resistor)*
	Input 1	Probe 1 and Over-ride 1		Yes	Over-ride signal 1
	Input 2	Probe 2 and Over-ride 2		Yes	Over-ride signal 2
	Input 3	Probe 3 and Over-ride 3		Yes	Over-ride signal 3
	Input 4	Probe 4 and Over-ride 4		Yes	Over-ride signal 4
	Input 5	Probe 5 and Over-ride 5		Yes	Over-ride signal 5
	Relay 1	Thermostat Channel 1		N/A
	Relay 2	Thermostat Channel 2		N/A
	Relay 3	Thermostat Channel 3		N/A
	Relay 4	Thermostat Channel 4		N/A
	Relay 5	Thermostat Channel 5		N/A
* For PT1000 probes use 820 Ohm
For NTC2000 and NTC2k25 probes use 590 Ohm
	Ensure that all power is
	switched off before
	installing or maintaining
	this product		Revision 1.2		Page 4 of 21