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Terminator
Tap Replacement
Response Time
The terminator
(Figure
link connection. The terminator contains internal electrical components
specifically for a GuardLink system; other terminators cannot be used as
substitutes.
Figure 8 - Terminator — Catalog Number 898D-418U-DM2
A GuardLink tap can be replaced with the same type of tap while the link is
powered. When the connections are remade; the GuardLink circuit recovers
automatically.
The GuardLink circuit has a fast response time. When a safety device opens,
the tap responds within 5 ms. The GuardLink safety signal then travels
upstream to the DG safety relay, which takes an additional 35 µs through each
upstream tap.
Figure 9
shows an example GuardLink safety circuit with six taps. In this
example, a SensaGuard rectangular flat pack interlock, which is connected to
Tap 4, opens.
Figure 9 - Response Time Example Calculation
Tap 1
Tap 2
DG Safety Relay
100S-C09EJ
Safety
Contactors
Rockwell Automation Publication 440R-UM015C-EN-P - April 2018
8), must be installed on the last tap to complete the
SensaGuard
Opens
Tap 3
Tap 4
Upstream
Single Wire Safety Out
GuardLink System Design
Chapter 2
Tap 5
Tap 6
Downstream
29
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