Instruction manual

ControlWave Gas Flow Computer (GFC Plus) Instruction Manual (CI-ControlWave GFC Plus)
Revised Feb-2013 Installation 2-27
Notes:
 Cable part number 395402-01-8 = 10 foot communication cable.
 Cable part number 395402-02-6 = 25 foot communication cable.
COM2 is intended for connections to modem/radio located on the
battery cover/radio mounting plate.
RS-232 COM
Port Names and
Connectors
RS-232 COM ports use different connector types.
Table 2-6. RS-232 Connectors
Connector Name # Pins and Type Notes
J4 COM1 9-pin male D-type Choice of active connector for COM1
determined by jumper W18.
Ships from the factory connected to the local
port on the bottom of the front cover of the
unit.
J11 COM1 3-pin male Choice of active connector for COM1
determined by jumper W18.
TB3 COM2 8-pin terminal block Use this port for connection to a radio
mounted on the battery cover/radio mounting
plate.
TB4 COM3 5-pin terminal block This port can be configured as either RS-232
or RS-485. See Section 2.9.2 for more
information.
RS-232
COM1/COM2
Port Cables
For the ControlWave GFC Plus, half-duplex communications use
Modbus or BSAP protocol, while full-duplex communications use
point-to-point protocol (PPP). RS-232 ports use a “null modem” cable
(see Figure 2-17) to connect with other devices (such as a PC, a printer,
another ControlWave [except the CW_10/30/35]) when the
ControlWave GFC Plus uses the full-duplex PPP protocol.
Note: You can configure the ControlWave GFC Plus as either a master
or slave node on a Modbus or BSAP network.
Figure 2-16 illustrates the CPU module’s male 9-pin D-type connector.
for COM1. Use the content provided in Table 2-7 to determine pin
assignments for the COM1 and COM2 ports.
Figure 2-16. Male DB9 9-Pin Connector