ST950S Plus+ Installation and Commissioning Manual
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An extra RAG node will be provided and is expected to be mounted within the aspect associated
with the third Green. In this case the Third Green is connected to SK2 of the additional RAG
node.
Important:
The Green-Arrow Optic in side-boxes always connects to the Green2 Output of a RAG Node.
This is the case even when a second dedicated RAG Node is required for a second Green-
Arrow side box, where Green2 is the only connection used on that RAG Node.
Important:
The connector for the Green signals (Green1 or Green2) cannot be mixed with the Amber or
Red connector positions. However, The Red and Amber do have the same connector type. A
small Red tag is added to the ‘Red’ signal cable to assist in identification. However, if the two
connectors are reversed neither aspect will light and a fault will be registered at the controller.
Figure 40. RED Signal Aspect showing Red Tag
4.3.4. Digital I/O (PL2)
The Digital I/O connector is used to interface to a number of peripherals:
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4 TOPAS 2523 compliant inputs for above ground detectors along with the 0V returns
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1 input for Solar Cell – to be used with the ELV Solar Cell
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3 +24VDC outputs for powering the above ground detectors along with the respective 0V returns
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6 pins for the 2 TOPAS 2523 compliant digital outputs (N.O., Common, N.C. on each of 2
outputs).
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The other pins are used for additional 0V returns and to provide an output for 48V unswitched
(always on)
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