ENMET ISA-40M - Manual (Page 10)

ENMET Corporation ISA-40M Oxygen Monitor
8
3.3 Relay Outputs
Relay contacts can be used to activate other alarm signals or equipment away from the control unit enclosure when
there is an alarm condition and when the
AC or DC power is interrupted. The contacts supplied are dry, with a rating of
2 Amp continuous, 5 Amp surge. Do not overload the ISA-40M power supply by connecting it through the relay
contacts to an inappropriate load. See Wiring Information Tables 3 & 4 and Sections 3.3.1 and 3.3.2 and the Figure 6
Utilizing Relay Contacts.
Internal view of ISA-40M
Suggested wiring configuration for utilizing relay contacts
(manual on/off switch is suggested; user supplied component)
Figure 6: Utilizing the Relay contacts
Normally
Closed
Contact
Common
Contact
110 V AC
Power supply Outside
of Control Unit
Manual On/Off
Switch
Horn
White
Black
TB7 inside Control Unit;
Location of latching
relay contact terminals
TB3 inside Control Unit;
Location of non-latching
relay contact terminals
TB7
T
B
3