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Warning

Please Note

The specifications of the product detailed on this

Set-Up Guide may change without notice. RDM

Ltd. shall not be liable for errors or for incidental

or consequential damages, directly and indirectly,

in connection with the furnishing, performance or

misuse of this product or document.

Ensure that all power is

switched off before

installing or maintaining

this product

Mercury 3 M & E Installation Guide

www.resourcedm.com

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.

M-type (Mechanical Expansion Valve or Compressor)

TYPE

Integral Case

Types 1&2

Remote Case

Types 3&4

Coldroom Controller

Types 5&6

Alarm

Action

Plant Input

(Switched

Resistors)

Input 1

Air on Temperature

Yes

Input 2

Air off Temperature

Yes

Man Trap alarm

type 5 & 6

Input 3

Evaporator

Temperature

Evaporator Temperature

Evaporator

Temperature

Plant fault 1 or

External Defrost

Input

Input 4

Suction Line

Temperature

Suction Line Temperature

Suction Line

Temperature

Case Clean Switch

Input 5

Defrost Termination or

Monitor probe (if used)

Defrost Termination or

Monitor probe (if used)

Defrost Termination or

Monitor probe (if used)

Conditional*

Plant fault 2 on

types 1 & 2

Door switch on

types 5 & 6

Input 6

Logging Probe (If fitted)

Conditional**

Variable

Input

Not used

N/A

Digital 1

Selectable; Plant 1,

Switch, Defrost, Plant 2

Selectable; Plant 1, Switch,

Defrost

Selectable; Plant 1,

Switch, Defrost, Door,

Man Trap

Conditional

Digital 2

Selectable; Plant 1,

Switch, Defrost, Plant 2

Selectable; Plant 1, Switch,

Defrost

Selectable; Plant 1,

Switch, Defrost, Door,

Man Trap

Conditional

Relay 1

Compressor A

Liquid Line Valve

N/A

Relay 2

Fans

N/A

Relay 3

Lights/Alarm Relay

N/A

Relay 4

Compressor B

Suction Line Valve/Trim

Heater/Alarm Relay/Remote

Relay

Suction Line

Valve/Alarm

Relay/Remote

N/A

Relay 5

Defrost Heater

Defrost Heater (N/O)

N/A

E-type (Electronic Expansion Valve)

TYPE

Remote Case

Types 3&4

Coldroom Controller

Types 5&6

Alarm

Action

Plant Input

(Switched

Resistors)

Input 1

Air on Temperature

Yes

Plant fault 1 or

External Defrost

Input 2

Air off Temperature

Yes

Case Clean Switch

Input 3

Evaporator Temperature

Yes

Input 4

Suction Line Temperature

Yes

Input 5

Defrost Termination or Monitor

probe (if used)

Defrost Termination or Monitor probe (if

used)

Conditional*

Door Switch on

types 5 & 6

Input 6

Logging Probe (If fitted)

Conditional**

Man Trap on types

5 & 6

Variable

Input mA

Transducer Input (if fitted)

Yes

Variable

Input V

Transducer Input (if fitted)

Yes

Digital 1

Selectable; Plant 1, Switch,

Defrost

Selectable; Plant 1, Switch, Defrost, Door,

Man Trap

Conditional

Digital 2

Selectable; Plant 1, Switch,

Defrost

Selectable; Plant 1, Switch, Defrost, Door,

Man Trap

Conditional

Relay 1

Electronic Expansion Valve

N/A

Relay 2

Fans

N/A

Relay 3

Lights/Alarm Relay

N/A

Relay 4

Suction Line Valve/Trim

Heater/Alarm Relay/Remote Relay

Suction Line Valve/Alarm Relay/Remote

N/A

Relay 5

Defrost Heater (N/O)

N/A

* Probe will alarms if set to monitor probe in parameters.

** Probe will alarms if log probe type is set to ‘Logging/Alarm’ in parameters

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