User guide

Revision 2.2 Page 4 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 Modules
The ML controller is supplied in two parts, a panel mount display / control unit and a relay / power supply module in a black ABS
enclosure. The two units are interconnected using the 0.75m lead supplied, the control unit derives it’s power from the relay module. All
the terminals for power, control relays, networking and temperature probes are contained within the relay module as shown below.
The ML controller can be used with a 230 Vac 50Hz or 110V 60Hz mains supply, the switched mains outputs for the relays are fed by the
relay module so only one mains supply needs to be connected.
5 Relay module with RS232 connector (for connection to an IP Network)
Connections:
NEUTRALS: Supply Neutral connections
LIVE: Supply Live connections
N/C: Relay normally closed contact
N/O: Relay normally open contact
All relays will output the supply voltage
Note. Earth is a functional earth, not a safety earth
!
Probe Common
Probe 4 Selectable
Probe 3 Selectable
Air Off
Air On
Probe Common
Relay 1
Relay 2
Relay 3
Relay 4
Relay 5
170mm
70mm
75mm
75mm
70mm
133mm
149mm
Fixing Centre
Display
Connection
RS232 Comms.
Connector
Temperature
Probe Connector
1A Anti Surge
Fuse
Supply Neutral
Supply Earth
Supply Live
Functional Earth
Functional Earth
Note: Middle
connector not used.
Applies to all relays
Probe Connection Detail