Operator`s manual

42
Flashing d
Loss of Communication Mode
(continued)
Communication Troubleshooting
• DC Voltage 2.3v - 2.6v (all devices must be connected to the communications
network)
• Voltage between 485+ and 485- is typically less than 0.3vdc.
• An open wire, poor connection or misplaced jumper will affect voltage.
Communication Board Troubleshooting
The communication board is a sacrificial element to protect the main board from
damage due to voltage spikes.
• DC Voltage output 2.3 - 2.6v
• 0 volts brown to red or black to red indicate a damaged communication board.
Replace communication board (see parts list).
2.3 to 2.6 VDC
Touch
points to
measure
voltage
AE8-1337 R1