Measurement-computing PointScan 300 Series rev.1.0 Manual do Utilizador descarregar pdf (Página 15)

PointScan/300 User’s Manual

9-12-01

Power and PT-Bus Wiring 3-1

Power and PT-Bus Wiring 3

DC Power Overview

PointScan/300 modules can be powered from the same DC source that is used to power your I/O devices.

No separate power supply is required. Typically, 10 to 30 VDC power is applied to terminals 24 and 25 on

the base of each module.

The PointScan/443 is used to power up to seven PointScan modules of any type, instrumentation loops, and

other devices. It operates on 85-264 VAC (47-63 Hz) or 120-370 VDC and outputs 24 VDC at up to 1 A.

Refer to the figure below for the proper power connections.

DC Power Wiring PointScan/443

PointScan/442 gateways, and user instrumentation loops may be powered from the PointScan/443 power

supply. The PointScan/443 supplies 24 volts DC at a maximum of two amps.

DC Power Wiring (User DC Source)

PointScan/442 gateways, and user instrumentation loops may be powered from a single DC source. The

user DC power source must be between 18 to 30 volts.

Current Requirements

To calculate the current requirements, add the wattage required for the I/O modules in use, then divide the

total wattage by the DC power source voltage. Then add any current needed for user instrumentation loops.

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Measurement-computing PointScan 300 Series rev.1.0 Manual do Utilizador Página 15