Table 19: Rs-485 Field Wiring On Xrc; Table 20: Rs-485 Terminations - ABB XSeriesG4 User Manual

NOTE: Voltage on the following steps may be hard to see using a digital multimeter. If available, an oscilloscope
will provide a more accurate reading. To verify, the host software must be continuously polling the XRC
Step-by-step instructions
Using an oscilloscope, measure line driver voltage on the XRC
pin 8 or 9 (BUS+). When the unit is receiving data from the host, the voltage should vary between +5 Vdc and 0 Vdc. This
would indicate that the unit is receiving data.
Using an oscilloscope, measure remote request to send (RRTS) voltage on the XRC
pin 2 (Ground) and pin 5 (RRTS). When the unit is transmitting data, voltage should vary between +5 Vdc and 0 Vdc. This
would indicate that the RRTS is working correctly.
If any inaccuracy exists, investigate wiring errors or damaged wires.
NOTE: If a communication problem still exists, and the unit has passed the tests in steps 1 and 2, additional
testing will be required. Call Totalflow Technical Support for additional help.
Getting technical support help
Technical support
Totalflow takes pride in providing on-going support to customers. Purchased products come with documentation which should
answer most questions; however, Totalflow Technical Support provides an 800 number as an added source of information.
For assistance, call: USA: (800) 442-3097

Table 19: RS-485 field wiring on XRC

PIN Description
J6–COMM 1 and 2
1 V Battery
2 Ground
3 Switched V Battery
4 Operate
5 RRTS Remote Request to Send
6 Bus (-)
7 Bus (-)
8 Bus (+)
9 Bus (+)

Table 20: RS-485 terminations

Serial Comm Port
Jumper
First or Intermediate Unit
Last or Only Unit
International: 001-918-338-4880
G4
board
1 2
J7 J10
pins 2–3 pins 2–3
pins 1–2 pins 1–2
G4
board J6 between: COMM 1 or 2, pin 6 or 7 (BUS-) and
G4
XSeriesG4 Remote Controller User's manual 2103334 Rev. AB | 99
5 Troubleshooting
G4
.
board J6 between: COMM 1 or 2,