COM breakout cable wiring
If you are not including an I/O Expander in your installation,
connect the COM breakout cable to the meter cable that has a 24-pin
Molex connector.
Terminate the connectors or wires as shown below.
|
Port connection |
Wire or connector |
Connect to |
|
|---|---|---|---|
|
COM1 (RS-232)1 |
DB9 connector (from breakout cable) |
computer RS-232 serial port |
|
|
COM1 (RS-485)2 |
White wire (from breakout cable) |
RS-485 Data + |
|
|
Black wire (from breakout cable) |
RS-485 Data - |
||
|
RS-485 common shield |
Bare wire (from breakout cable) |
RS-485 shield (COM1 and COM4) |
|
|
COM4 (RS-485) |
Red wire (from breakout cable) |
RS-485 Data + |
|
|
Black wire (from breakout cable) |
RS-485 Data - |
||
|
COM 2 (modem) |
RJ11 connector |
modem telephone line |
|
|
Ethernet |
RJ45 connector |
LAN/WAN Ethernet port |
|
|
IRIG-B3 |
Red wire |
IRIG-B (+) |
|
|
Black wire |
IRIG-B (-) |
||
| 1 Refer to the section, “RS-232 connections” for additional information on RS-232 connections. | |||
| 2 For RS-485 communications, use an Ethernet to RS-485 or RS-232 to RS-485 converter. Refer to the communications converter documentation for details. | |||
| 3 IRIG-B cannot be configured via the meter’s front panel. See the IRIG-B GPS time synchronization technical note for configuration procedures. | |||
NOTE: If the Ethernet or modem connector is covered with a cap, that
communications option is not available on your meter. Label or tag
the cable end to clearly indicate that the option is not available.