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Chapter 2
GuardLink System Design
Tap Cabling
28
The GuardLink system was designed with the intent of minimizing wiring by
using quick-disconnect patchcords, while also allowing some manual wiring to
terminals, when pinout incompatibilities exist.
Figure 7
shows the recommended cable options for the various stages of a
GuardLink system (to show the cable options only two taps are required, a full
system has 32 taps). These cables are red-colored, PVC, unshielded, with
epoxy-coated hardware. Although any color jacket can be used, the red color is
preferred to indicate a safety circuit.
Visit
ab.rockwellautomation.com/Connection-Devices/DC-Micro-Cordsets-
and-Patchcords
couplings, and shielded cables.
To maintain the safety integrity of the GuardLink signal, the wiring distance
between taps is limited to 30 m (98.4 ft) and requires 18 AWG (0.82 mm2)
wire. If the distance between devices is greater than 30 m (98.4 ft), then a tap
must be inserted at least every 30 m (98.4 ft). A field-attachable quick-
disconnect can be wired as a shorting plug for the device connection. The
wiring distance between taps and the safety device is limited to 10 m (32.8 ft),
and requires at least 24 AWG (0.2 mm2) wire size.
Figure 7 - Recommended Cable Options
Black
Brown Blue
White
889D-F4NE-x
+ + - -
4-wire Cordset
DG
24V
Safety
30 m (98.4 ft) length, max
Power
Relay
Supply
(1) Replace the x with 0M3 (0.3 m [0.984 ft]), 0M6 (0.6 m [1.968 ft]), 1 (1 m [3.28 ft]), 2 (2 m [6.56 ft]), 5 (5 m [16.4 ft]), 10 (10 m
[32.8 ft]), 15 (15 m [9.2 ft]), 20 (20 m [65.6 ft]), or 30 (30 m [98.4 ft]) for standard cable lengths.
Rockwell Automation Publication 440R-UM015C-EN-P - April 2018
for other options, like right-angle connectors, stainless steel
(1)
Safety Device
889D-F5NCDM-x
5-wire Patchcord or
889D-F8NBDM-x
8-wire Patchcord
10 m (32.8 ft) length, max
INPUT
889D-F4NEDM-x
4-wire Patchcord
30 m (98.4 ft) length, max
889D-M5NC-x
5-wire Cordset or
Safety Device
889D-M8NB-x
8-wire Cordset
10 m (32.8 ft) length, max
INPUT
889D-418-DM2
Terminator
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