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Condition Pins Relay State
OUTPUT Connection between PIN 3 & PIN 5 Momentary contact closure
RESET Connection between PIN 2 & PIN 5 Momentary contact closure
INTERLOCK Connection between PIN 4 & PIN 5 Remote Interlock utilizes a set of closed contacts
to enable the instrument’s output. The output of the
instrument will be disabled under the following
conditions:
• If the Interlock contacts are open and the
OUTPUT/RESET key is pushed
• If the interlock contacts are opened during a test
(test will automatically abort) A pop up message
will be dispalyed:
Trigger Connection between PIN 5 & PIN 6 Momentary contact closure
Note – Pins 5 & 7 are Common/Ground
The rear panel Signal Input connector of the APT 8500 Series can be used to control any test operation via
remote. The 9-Pin D-Type connector enables remote operation for OUTPUT, RESET, Remote Interlock, File
Recall and Trigger functions. Remote functions will be activated once the PLC Remote parameter from the
System menu is turned on. When the PLC Remote paramater is turned on, you are not able to initiate a test
from the front panel OUTPUT/REST Key. However, when there is an abnormal output detected you can reset
by pressing either the OUTPUT/REST key or through the PLC remote.
Signal Input
The following table provides the conditions of each pin and the relay state:
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