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installation
Functional Description and Installation Considerations
Alarm or Shutdown—Units with Triacs (identified by Model No. 440DR-
2X01-XXXX).
Maximum ratings for the solid state relays used for alarm and shutdown are
as follows:
Continuous Current Surge and Overload
(Duty Cycle Less Than 1%)
5 A
1 Second 25 A
16 Millisecond 50 A
1 Millisecond 125 A
Maximum Voltage
140 VAC (115V Model)
280 VAC (230V Model)
Maximum Off State Leakage 1 mA
Isolation 2500 VAC min
Required Holding Current 50 mA
As you can see from the above specs, these are medium power rated devices
and are quite useful in controlling relays, contactors and most motor starters
directly. Maximum noise immunity is obtained when used in the open on alarm
(N.C.) mode.
Alarm or Shutdown—Units with Analog Switch in place of Triac (identified
by Model NO. 440DR 2X22-XXXX).
For light loads such as computers or PLCs, the analog switch is easier to inter-
face since it has virtually no leakage current. The analog switch does not require
the 50 mA holding current and operates equally well with AC or DC.Maximum
ratings for units with Analog Switch in place of Triac are as follows:
Continuous Current 170 mA
Maximum Voltage 250V
Maximum Off State Leakage 10 Micro amp
Required Holding Current None
Isolation 2500 V
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