Keyscan CA250B - Figure 1 - Grounding Access Control Units and Cables with Cims

Keyscan Inc. – Technical Guide (PC109x - 04.15)
14
Figure 1 - Grounding Access Control Units and Cables with CIMs
40-2322
Data Cable
Note
Connect ground lug
to single cold water
pipe ground point
Tape
back
shield
Reader
Wiegand
Reader
Signal
ACU 1
RS232
Control Board
Control Board
ACU 2
Shield Shield
Green
Black
Red
ACU 3
Control Board
Shield
CIM 0
EGND EGND
CIM
CIM
EGND
Tape
back
shields
CAT 5
Ground
Lug
RS-232**
Common Ground Wire
CAT 5
Common Ground
Wire
Tape
back
shield
KEYSCAN
KEYSCAN
KEYSCAN
Earth GND
on DPS15
Earth
GND
on
DPS15
Earth
GND
on
DPS15
KI-00470E-07-12
Shield*
* Insulate shield with
PVC tubing such as
Alpha (p/n PVC10516
16 AWG) or
comparable insulator.
** RS-232 connections at
CIM 0 do not apply when
using a NETCOM2P/6P.