Cool Automation CoolMaster 3000T Specifiche Scaricare il pdf (Pagina 38)

38 Powermonitor 3000 Master Module

Publication 1404-IN007F-EN-P - November 2009

RS-485 Connections

Shield Connection

(See Note 4)

IBM Compatible

Personal Computer

PLC Processor

SLC Processor

ControlLogix Processor

Notes:

Powermonitor 3000 Device #1

Powermonitor 3000 Device #2

Powermonitor 3000 Device #3 (Last)

RS-485

External

RS-232C to RS-485

Converter

(See Note 3)

150 Ω

Terminating

Resistor

(See Note 2)

150 Ω

Terminating

Resistor

(See Note 2)

SHLD

Three-device network shown. Up to 31 DF1

Slave Devices can be connected to a

DF1 Master without the use of a repeater.

Terminating resistors may be required for

networks with long distances or high noise

environments. Consult the RS-232 to RS-485

converter manufacturer for more informaiton.

Examples:

B&B Electronics

Part Number 485SD9TB (DB9)

Allen-Bradley Cat. No. 1761-NET-AIC

Shields should be connected at

one end only to avoid ground loops.

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Cool Automation CoolMaster 3000T Specifiche Pagina 38