Emerson ControlWave GFC Instruction Manual download pdf (Page 44)

ControlWave Gas Flow Computer (GFC Plus) Instruction Manual (CI-ControlWave GFC Plus)

2-26 Installation Revised Feb-2013

Like the power distribution board and the digital to relay I/O board,

each ControlWave Loop Supply board mounts to the inside of the

enclosure using a Snap Track that you secure to a dual PCB mounting

bracket.

2.9 Communication Connections

Communication is via the serial ports and optional Ethernet port.

2.9.1 Connections to RS-232 Serial Port(s) on the CPU/System

Controller Board

An RS-232 port provides point-to-point, half-duplex and full-duplex

communications (for a maximum of 20 feet using data quality cable).

Your CPU includes two RS-232 ports (COM1 and COM2) as well as

one port (COM3) configurable for either RS-232 or RS-485 operation.

COM1 provides a choice of connectors based on a jumper setting. It is

factory-connected to the local port at the bottom of the unit’s cover.

Figure 2-15 shows the local port cable connections for COM1.

Figure 2-15. PC Connected to ControlWave GFC Plus via Circular Local Port

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Emerson ControlWave GFC Instruction Manual Page 44