6
6. Power Connection
Be sure to connect the ground FG
terminal to a class-3 ground (Ground
resistance should not exceed 100Ω).
Try to make the ground wire as short
as possible.
Use 28
–
12 AWG (0.5
–
1.5 mm
2
) wire
for the power connections.
7. Termination Switch
P5150NH HMI has a built-in termination resistor switch.
To enable or disable the termination resistor please follow the configuration
shown in the table below. The termination switch is for COM3 [RS-422 / RS-
485] and COM4 [RS-485].
Configuration of Termination Resistor Switch.
Termination Resistor
No.
COM3 [RS-422]
COM3 [RS-485]
COM4 [RS-485]
Enable
Disable
Enable
Disable
Enable
Disable
6
OFF
OFF
OFF
OFF
ON
OFF
5
OFF
OFF
OFF
OFF
ON
OFF
4
ON
OFF
ON
OFF
OFF
OFF
3
ON
OFF
ON
OFF
OFF
OFF
2
ON
OFF
OFF
OFF
OFF
OFF
1
ON
OFF
OFF
OFF
OFF
OFF
