17
Internal CONTROL RELAY
Presettable Timer/Counter operation, Programmable Thermostat and Temperature HIGH/LOW ALARM can activate internal
Control Relays that can be used to switch external loads up to 10Amp/240VAC. The Relays have SPDT contacts with Arc-
Free switching protection. For Programmable Thermostat only either Normally Open or Normally Closed SPST contacts are
usually wired from both internal relays.
CONTROL RELAY Wiring
Make sure that all power is disconnected.
1.
Locate the Relay Contacts screw terminal on the back panel of enclosure.
A) Relay Only when power cord installed:
B) Relay Only when screw terminal for power installed:
C) Relay and Internal DC Power Source:
2.
Attach the load wiring to the terminal and secure it with terminal screws.
NOTE: Wiring should be of sufficient gauge to carry the load current and insulation should be appropriate for load
voltage. Remember to provide adequate fuse protection.
3.
Affix wiring cables to the tie-wrap or a clamp to secure it on the cover.
Relay
Contacts
Terminal
Relay
Contacts
Terminal
Power line
Terminal
POWER
RELAY
POWER
CORD
RELAY
Relay and Internal DC Supply Terminals
Power line
Terminal
(if installed)
.POWER
Internal DC Source
Fuse 0.25A Max.
or 1 Amp Max.
Depending upon the model
NO - C
- NC
+ 15V -
RELAY
In
t. Su
p.
Power line
Fuse (0.25A)
POWER CORD
(if installed)