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Marking of electrical conductors
1
Output signal in mA (terminal 1 of
ISC/OLDHAM central units)
2
Electrical earth (terminal 2 of
ISC/OLDHAM central units)
3
+ 24V DC power supply (terminal 3
of ISC/OLDHAM central units)
4
(service: output not used)
> or = 10 mm
EEx "d"
compartment
M25 nut + seal
Customer supply
Earth screw
Thread M25, pitch 1.5
11
EEx "e"
compartment
Figure 8
OLCT IR M25 version
Wiring
1 kO resistor supplied and wired by
ISC/OLDHAM
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