Wiring The External Reject Function - Filtec FT-70c Service And Technical Reference Manual

Wiring the External Reject Function

Industrial Dynamics Company, Ltd. © Form 40256-0600
You can connect any external switching device to the External
Reject Function, such as a manual contact switch or the switched
output from another device.
A switching closure to ground signal is required. When the signal
is in the low state it will trigger the FT-70 to send the rejector
activation signal.
Circuit Type Sensitivity
NPN Low State
1. Route the signal cable through one of the moisture resistant
fittings in the bottom of the FT-70. If your FT-70 is equipped
with an external I/O Junction Box, route the cable through one
of the moisture resistant fittings in the bottom of the junction
box.
2. Determine which pins on terminal bracket TB1 the signal wires
must be attached to. Normally this would be pins TB1-20
(signal) and TB1-21 (ground), however depending upon the
options installed within your FT-70, these pins may be
reassigned. Use the View TB1 & TB4 Pin Assignments Function
to determine the proper wiring-pin configuration (see chapter
5).
3. Connect the signal wires to the proper pins on TB1.
Chapter 4: Configuring the FT-70 for Operation
Active Signal and
Signal Wave Shape
Ground (GND)
Inactive Signal
Open (+20V)
4-15