Specifications

GEMINI

Traffic Outstation Handbook

667/HB/32600/000 Page 82 Issue 11

Each controller signal output, which is to be monitored, requires one current sensor as

described on the RMS Instation computer printout. Examples of output types to be

monitored are indicated in the following list. They all require one current sensor unless

otherwise stated:

(a) Each 3-aspect vehicle phase

(b) Each 2-aspect pedestrian phase

(d) A 2-aspect pelican pedestrian

(e) Each group of wait lamps associated with the same pedestrian phase

(f) Each green arrow (or filter) phase

(g) Each switched sign phase

(h) If regulatory signs are to be monitored then they need to be grouped together

(i) Each “flashing amber signal group” phase requires one or two current sensors,

depending on monitoring requirements (this phase type is applicable to export

signal sequences only)

Each current sensor can monitor currents up to 4.25A RMS.

If the nominal load current (not including the red/ambers) of a particular controller

output exceeds approximately 4.0A RMS, then that output should be split and treated

as two separate outputs.

The maximum regulatory sign load is restricted to 7 signs (21 tubes) per input

(choke/ballast types only allowed).

The current sensors measure the current flowing in the wires that are passing through

their core. To maintain the correct relationship between the current flowing in the

conductor and the output from the sensor, the sensors must be connected the correct

way round (see following diagram).