Revision 2.3
Page 14 of 14
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 Multistage Thermostat Installation Guide
www.resourcedm.com
Relays
IMPORTANT:
Some early versions of Relay modules had relays fitted in position 1 that had a lower N/O contact rating (0.5 HP) Look at
the label on the enclosure lid for the correct Relay rating.
Relay 1 Fans
N/O contact 230 Vac/16A
Resistive Load
N/O contact 230 Vac/(2HP)
Motor Load
N/C contact 230 Vac/10A
Resistive Load
N/C contact 230 Vac/1/2HP)
Motor Load
Relays 2 - 5
N/C contact 230 Vac/10A
Resistive Load
N/C contact 30 Vac/3A
Inductive Load Cos
Ф =0.4
N/O contact 230 Vac/10A
Resistive Load
N/O contact 30 Vac/3A
Inductive Load Cos
Ф =0.4
Damage to relays through out of specification usage will invalidate the warranty.
Inputs:
Input 1
Thermistor probe
Input 2
Thermistor probe
Input 3
Thermistor probe or 0V return
Input 4
Thermistor probe or 0V return
Part Numbers
ML Stat Controller, 5 Relay, RS485 Comms and Screw Terminals:
PR0122-STA
ML Stat Controller, 5 Relay, RS485 Comms and Screw Terminals: (100 Units):
PR0122-STA-100
ML Stat Controller, 5 Relay, RS485 Comms and Screw Terminals: (10 Units):
PR0122-STA-10
ML Stat Controller, 5 Relay, RS232 for IP Comms and Screw Terminals:
PR0123-STA
ML Stat Controller, 5 Relay, RS232 for IP Comms and Screw Terminals: (100 Units):
PR0123-STA-100
ML Stat Controller, 5 Relay, RS232 for IP Comms and Screw Terminals: (10 Units):
PR0123-STA-10
Revision History
Revision
Date
Changes
V2.3
20/06/2011
New layout and diagrams
