Omron NSH5 - 10-2010 Operation Manual page 53

Connecting the Special Cable
Note
Be sure to correctly connect the connectors as shown in the following dia-
gram.
Serial interface:
24-VDC power supply interface: Black, 3-pin connector
External output interface:
External output interface
9. When using RS-422A communications, turn ON DIP switch pin 1 (termi-
nating resistance ON) only when the PT is wired as the end communica-
tions node.
DIP switch pin 1 connects and disconnect the terminating resistance. Always
leave pins 2 to 4 turned OFF (default setting).
10. Replace the cover, insert the four mounting screws, and tighten them to a
force of 0.4 N·m.
White, 20-pin connector
Black, 18-pin connector
Serial interface
24-VDC interface
Section 2-3
29