Applying Power; Interconnecting Cable Guidelines - General Monitors TA102A Instruction Manual

3.6

Applying Power

Zero Two Series Modules do not have an ON/OFF power switch. Each module in the
Zero Two Series operates from 24Vdc. Current requirements will vary according to the
number and type of modules in the system, as well as the number and type of field
devices.
NOTE - If the application of power does not turn ON the unit, check fuse F1 on the
control board.
NOTE - If the unit displays an F4 condition upon power-up first try to clear this condition
by calibrating the sensor. If this condition persists, replace the sensor.
3.7

Interconnecting cable guidelines

The interconnecting cable should have an overall screen or screen and armour. Cables
to BS5308 or equivalent are suitable. Note that the terms "screen" and "shield" are
equivalent for the purposes of this manual.
Interconnecting cables should be segregated from power and other "noisy cables. Avoid
proximity to cables associated with radio transmitters, welders, switch mode power
supplies, inverters, battery chargers, ignition systems, generators, switchgear, arc lights
and other high frequency or high power switching process equipment.
In general, maintain a separation of at least 1m between instrument and other cables.
Greater separations are required where long parallel cable runs are unavoidable. Avoid
running instrument cable trenches close to lightning conductor earth pits.
General Monitors do not recommend the use of cable shoes or crimps on any junction
box or housing wiring terminals. Poor crimping can cause bad connection when unit
experiences temperature variations. We therefore recommend good practice is to just
terminate cable or sensor wires as is, especially in remote sensor applications.
Complete all cable insulation testing before connecting the cable at either end.
Refer to Smart Sensor Manual for installation instructions.
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Model TA102A