635-SERIES HARDWARE M ANUAL
Chapter-Page
2-12
2.2 Running Field Wiring
1.
Typically, most of the field wiring is run before the controller/hardware is installed.
a)
Route wiring in a neat and secure manner.
b)
Do NOT run data wires near high power/high frequency devices or wiring.
c)
Leave a
service loop
inside the controller for future maintenance.
2.
Obey all local, state and federal codes when choosing the field wiring.
3.
Galaxy recommends overall shielded for all wiring.
4.
Ground drain shields at one end only.
In the case of daisy-chained RS-485 devices (readers, input boards,
output relay boards, …) you must ground the drain wire at one end for each segment between the devices.
5.
Install surge protectors at the device-end where locks are concerned.
6.
Install 120-ohm terminal resistors at both extreme ends of an RS-485 network run.
•
The 635-DSI Board
has a terminal jumper on the board (one for each section). You must leave the jumper
open unless the board is at one ‘extreme end’ of a wire run. Treat the DSI sections independently:
Channel-1 could be at the extreme end while channel-2 is not.
•
The 635-Input Board
has a terminal jumper on the board. You will leave the jumper open on every board
except the one(s) that are at the extreme end of the run.
!
IMPORTANT: Use the correct/approved types and gauges of wiring. Overall shielded wiring is always
recommended for all wiring
(see
Chapter-1).
!
IMPORTANT: Observe Wiring Distances for all hardware.
Failure to obey wiring distances can cause
equipment or system failure, or improper operation (see
Chapter-1).
