Renu Electronics GWY-00, User Manual

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2.2 Power Requirements
Gateway is a 24VDC powered unit. Power should be applied on the PCB Terminal block on the Gateway
unit. Power rating is +24VDC +/- 10%, 100mA max. For specification of non-GWY-00 models, please refer
to ‘Addendum for Special Gateways’. Please follow the instructions given below when making power supply
connections:
Follow the sticker wiring diagram on the unit which shows terminals for the positive
DC, negative DC and ground.
To make a connection strip about 1/4" (6mm) of insulation of the wire and turn the
connector screw counter-clock wise until the gap is wide open. Insert the wire all
the way in and turn the screw clockwise until it is tight.
Wire lengths should be minimum. Wires should run in pairs with a neutral or
common paired with a live or signal wire.
A fuse should be connected from outside wherever required for models from
GWY-01 to GWY-08.
Gateway products are housed in a molded ABS plastic case which eliminates any
electrical shock hazard. Hence Safety ground is not required to be connected to the
chassis of the unit.
The DC ground is not directly coupled to Earth ground internally. The unit is
designed to operate properly whether or not the DC ground is connected to the
Earth ground. We do recommend, however, that if the DC ground has to be
connected to the Earth ground, the Earth connection should be made to a central
star point as poor site earths can introduce noise into a system.
Do not power Gateway and inductive loads with the same power supply even though
there is enough immunity in the Gateway to withstand the transients present on
these lines. Avoid using power supplies with large capacitive outputs, which may
cause problems if power is cycled within a short time period. If wiring is to be
exposed to lightening or surges, use appropriate surge suppression devices.
Keep AC, high energy and rapidly switching DC wiring separate from signal wires.
Connecting high voltages or AC power mains to the DC input will make Gateway
unusable and may create an electrical shock hazard to personnel. Such a failure or
shock could result in serious personal injury, loss of life and/or equipment damage.
DC voltage sources should provide proper isolation from main AC power and similar
hazards.
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