Wiring Connection
The touchscreen is connected to the control unit via RS-485 wiring.
Using the recommended cables, splice the cable together with the pigtail of the touchscreen and seal the splice.
Route the cable from the touchscreen to the host module. Connect the cable to the module port as shown in the
wiring diagram that follows.
The recommended cable types for RS-485 are:
⦁
Belden 9842 or equivalent
⦁
24 AWG twisted pair with characteristic impedance of 120ohm
Maximum distance: 900m (3000ft)
Shield Connection
Connect the touchscreen and cable shield wires together at the pigtail splice. Connect the cable shield to a suitable
earth point.
Do not
connect the cable shield to a ground or AUX connection.
Do not
terminate the touchscreen
shield wire inside the touchscreen.
Important:
⦁
The touchscreen must be connected to the module port using a shielded cable.
⦁
The shield must only be connected at one end of the cable in the metallic enclosure (frame grounded).
⦁
Do not connect the cable shield to an AUX-, 0V or V- connection on the module.
⦁
Do not connect the cable shield to any shield used for isolated communication.
⦁
The touchscreen and cable shield wires must be joined at the touchscreen pigtail splice.
⦁
Do not join the shield and black wires at the touchscreen device.
⦁
Do not terminate the touchscreen shield wire inside the touchscreen.
PRT-TS50-TH | Protege 5" Touchscreen | Installation Manual
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