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Tag holder and strip
position with
surge-protection
module
4.5
All carriers must be earthed. Each carrier has a surge-ground screw, located to the rear of
the alarm module – see Figure 4.4 below.
This terminal is used to carry the surge current to ground if surge protection modules are
used on the carrier. In these circumstances, it MUST be connected via a low impedance
path to the plant ground. It is recommended that a cable with a cross-sectional area of
at least 4mm
grounding bus.
INM MTL SUM5 Rev 1
Figure 4.3 - Tagging strips in use
Carrier earth protection
138 mm
Figure 4.4 - Surge ground terminal – shown circled
2
, and a ring terminal be used to connect this screw terminal to the plant
195 mm
A B C A B C A B C A B C A B C A B C A B C A B C
1A 1B 2A 2B
1
ALARM
2
138 mm
Regular position
for tag holder
and strip
PWR1 PWR2
15
V1 V2 0V 0V
16
POWER
9
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