Isolator Modules
The NATIONAL TIME D900-ISO provides line to line short
circuit fault isolation on the DigiComm™ Loop or 24VDC riser. The Isolator can be configured for
style 4 or 7 (class A/B) operation. The Isolator provides a LED indication on activation. In style 4
operation, devices upstream of the activated isolator will operate as intended. In style 7
operation, devices upstream of the first activated isolator and downstream of the second activated
isolator will operate as intended. The isolator restores to normal operation upon restoration of the
fault condition. No system reset is required. The isolator mounts to a 4" diameter isolator base.
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Style 4 or 7 Operation (Class A/B) 