Siterwell GS690, Инструкция по установке и обслуживанию

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25
Document NO.: RD-690-39-001 Version: A Date
：
2017.12.30
Figure
–23
3.6.5 Addressable Loops
Figure
–24 Class A Style
Figure
–25 Class B Style
Each loop has capacity for 127 addressable devices.
There are two ways of circuit wiring, It is suggested that A should be adopted.If the loops is not correctly installed
(outgoing and incoming connections)the control and indicating equipment will not be able to monitor open-and
short-circuit conditions of the wiring.
Wiring for the addressable loops should use 2-core shielded cable with a cross-sectional area of (0.5~2.5)mm. Each
loop requires a separate shielded cable. wiring for non-addressable devices should not be contained within the shielded
addressable loop wiring.
Run the wiring as a loop, from the OUT terminals, to the field devices, and back to the RET terminals. connect the