Other Open Collector Outputs; Figure 27 - Recommended Relay Protection Circuits; Figure 28 - Terminal Designations For Unaccept And Calibration - General Monitors TA102A Instruction Manual

Model TA102A
The Fault outputs are SPDT relays, 1 open collector output (F-OC) that follows the logic
of the relays and 1 open collector output (FUA) dedicated to new fault indications.
NOTE - If the Backward Compatible configuration is ordered, the FUA will not be
present (pin 32d will be for +24VDC input).
The contact ratings for the A2 & A1 alarm and Fault relays are 4A @ 30V RMS/42.4V
Pk, 3A @ 30 VDC, Resistive, maximum.
Inductive loads (bells, buzzers, relays, etc.) on dry relay contacts must be clamped
down. Unclamped inductive loads can generate voltage spikes in excess of 1000 volts.
Spikes of this magnitude may cause false alarms and contact damage. Figure 27 shows
recommended relay protection circuits for AC and DC loads, respectively.
Figure 27 – Recommended Relay Protection Circuits

3.3.4 Other Open Collector Outputs

The terminal designation for the Unaccept and the Discrete Calibration outputs are:
Label Term Description
UA 18d Open collector Output
CAL/OC 32z CAL-Inhibit Mode Output
Figure 28 – Terminal Designations for
Unaccept and Calibration
NOTE - If the Backward Compatible configuration is ordered, the CAL/INH will not be
present (pin 32z will be for the COM).
The electrical rating for all open collector outputs is 100mA @ 35Vdc.
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