User guide

Revision 2.2 Page 9 of 17
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
ML Twin Controller Installation Guide
www.resourcedm.com
Relay Assignment
Relay 1 Compressor
Note 1
Relay 2 Fans, Lights, Trims, Solenoid Valve, Alarm, Trim Hub or Compressor
Relay 3 Defrost (use the N/O for correct operation)
Relay 4 Fans, Lights, Trims, Solenoid Valve, Alarm or Trim Hub
Relay 5 Fans, Lights, Trims, Solenoid Valve, Alarm or Trim Hub
Note 1: Normally relay 1 operation is from the lower HP switch N/C contact, if the higher HP switch N/O contact is required for normal
operation, then rLy1 option in the menu must be set from it’s default value 0 to 1.
Note: The relay assigned to Trim and/or SLV will indicate the inverse action on the Data Manager value page.
Relay State and functional operation
Relay State:
Function State
Wired contact
Relay 1 Off
Compressor 1 On
N/C
Relay 1 On
Compressor 1 Off
N/C
Relay 2 Off
Fans On
N/C
Relay 2 On
Fans Off
N/C
Relay 2 Off
Lights On
N/C
Relay 2 On
Lights Off
N/C
Relay 2 Off
SLV or Trims Off
N/O
Relay 2 On
SLV or Trims On
N/O
Relay 2 Off
Alarm Relay = Alarm
N/C
Relay 2 On
Alarm Relay = OK
N/C
Relay 2 Off
Compressor 2 On
N/C
Relay 2 On
Compressor 2 Off
N/C
Relay 3 Off
Defrost control Off
N/O
Relay 3 On
Defrost control On
N/O
Relay 4/5 Off
Fans On
N/C
Relay 4/5 On
Fans Off
N/C
Relay 4/5 Off
Lights On
N/C
Relay 4/5 On
Lights Off
N/C
Relay 4/5 Off
SLV or Trims Off
N/O
Relay 4/5 On
SLV or Trims On
N/O
Relay 4/5 Off
Alarm Relay = Alarm
N/C
Relay 4/5 On
Alarm Relay = OK
N/C
Sample Data manager Screen Shot (Fan Delay state after a defrost)
Note: Lights and trims have an extra value to indicate the state (This is the control state, not the relay state)
Relay 4 aliased to Inverse trim
Control
Relay 4 aliased to
Lights Control
Relay 2 aliased to Fan Control