Input And Output Allocation Tables; Input / Output Allocation Table; Switched Resistor Values; Setting Up The Controller - Resource Data Management PR0712-EPR Installation & User Manual

Mercury 2 & Intuitive Mercury EPR Stepper Installation Guide

Input and Output Allocation Tables

The following tables indicate; on a controller type basis, the functions of the inputs and outputs. Also shown are the digital inputs that are
derived by switching in a fixed value resistor across the input.

Input / Output allocation table

TYPE
Input 1 Air on Temperature
Input 2 Air off Temperature
Input 3 Evaporator Temperature
Input 4 Suction Line Temperature
Input 5 Defrost Termination or Monitor
probe (if used)
Input 6 Logging Probe (If fitted)
Input 7 Valve Shut Input (Only on 1P/Vi or
1P/Ai daughter card)
Relay 1 Fans
Relay 2 Lights / Alarm Relay
Relay 3 Suction Line Valve/Defrost Valve
(LLV)
Relay 4 Defrost Heater (N/O)
Stepper Stepper Motor Valve
Output
* Alarm on monitor probe only if used

Switched Resistor Values

For PT1000 probes use 820 Ohm switched resistors. For NTC2K, NTC2K25 and 3K probes use 590 Ohm switched resistors. For 5K and
6K use 1K Ohm switched resistors. For NTC10K probes use 2k7 Ohm switched resistors. For NTC10K(2) probes use 2k2 Ohm switched
resistors. The resistors used must have a tolerance of 1% or better and the resistor must have a power rating of 0.25W. For improved
accuracy whilst using switched resistors RDM recommend resistors with 0.1% accuracy are used. Note the switched resistor features will
not function when using 470R or 700R probes. When a resistor is switched across the appropriate input it signals to the Mercury to
enable the switched resistor function described for that input whilst still recording the probe temperature on the input.
Temperature range for all probe types is -49
Inputs which have a secondary function are restricted to -42
switch resistor features are needed then please see Switch Resistor parameter P-19
Note: switched resistors will operate in LT (Low Temperature) and HT (High Temperature) applications using PT1000, NTC2K or
NTC2K25 probe types only. For all other probe types the switched resistor inputs will work in HT applications only.

Setting up the controller

Access to the controller can be achieved several ways

Through the front mounted buttons

Direct access by PC or palm top into the rear comms port. This requires a software package available on the RDM website

Through legacy front end panels on 485 networks

Through the RDM Data Manager.

Across an IP network. (Current controller IP address required)

Setup through front buttons

ENTER
Warning
Ensure that all power is
switched off before
installing or maintaining
this product
Please Note
Remote Case
Types 3&4
Air on Temperature
Air off Temperature
Evaporator Temperature
Suction Line Temperature
Defrost Termination or Monitor
probe (if used)
Logging Probe (If fitted)
Valve Shut Input (Only on 1P/Vi or
1P/Ai daughter card)
Fans
Lights / Alarm Relay
Suction Line Valve/Defrost Valve
(LLV)
Defrost Heater (N/O)
Stepper Motor Valve
o o
C to +60 C for probe inputs which do not have a secondary function (switched resistors).
Coldroom Controller
Types 5&6
o o
C to +60 C. If the full temperature range is required on all inputs and no
To enter setup mode, hold the Enter and Down
UP
buttons together for approximately 3 seconds until
the message "Ent" appears on the display. Now
press the Enter button again to enter the function
menu. IO will be displayed. Scroll up or down to go
DOWN
through the list.
Revision 1.2a
Alarm Plant Input
Action (Switched Resistors)
Yes Plant fault 1 or External
Defrost Input
Yes Case Clean
No
No Case Clean Switch
Conditional* Door switch on types 5 & 6
Conditional* Man Trap on types 5 & 6
Yes
N/A
N/A
N/A
N/A
N/A
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