Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 122

Remote I/O Terminals with Transistors
Supplying I/O Power
2. Join the connector of the Expansion Unit directly to the connector of the
Basic Unit.
3. Insert the connector of the Expansion Unit securely into the connector of
the Basic Unit.
When supplying I/O power to an Expansion Unit in a combination of two Input
Units (Basic Input Unit and Expansion Input Unit), I/O power is supplied to the
Basic Unit only.
For combinations of a Basic Input Unit with an Expansion Output Unit, a Basic
Output Unit with an Expansion Input Unit, or two Output Units (Basic Output
Unit and Expansion Output Unit), the I/O power must be supplied to both the
Basic Unit and the Expansion Unit.
Refer to the following table to determine the correct wiring for the Unit combi-
nation being used.
Device combination
Basic Input Unit (IN) + Expansion
Input Unit (IN):
Example: DRT2-ID16+XWT-ID16
Basic Input Unit (IN) + Expansion
Output Unit (OUT):
Example: DRT2-ID16+XWT-OD16
Basic Output Unit (OUT) + Expan-
sion Input Unit (IN):
Example: DRT2-OD16+XWT-ID16
Basic Output Unit (OUT) + Expan-
sion Output Unit (OUT):
Example: DRT2-OD16+XWT-
OD16
Basic Output Unit (OUT) + Expan-
sion Input Unit (IN):
Example: DRT2-ROS16+XWT-
ID16
Basic Output Unit (OUT) + Expan-
sion Output Unit (OUT):
Example: DRT2-ROS16+XWT-
OD16
Note 1. When an NPN or PNP Basic Input Unit and NPN Expansion Input Unit are
combined, the V terminals of the Basic Input Unit and Expansion Input Unit
are connected internally. (Example: DRT2-ID16(-1)+XWT-ID16)
When an NPN or PNP Basic Input Unit and PNP Expansion Input Unit are
combined, the G terminals of the Basic Input Unit and Expansion Input Unit
are connected internally. (Example: DRT2-ID16(-1)+XWT-ID16-1)
2. Always turn OFF the power to the Units before connecting an Expansion
Unit.
I/O power supply to Expansion Unit
Not required. (I/O power supply shared with
Basic Unit.) (See note 1.)
Required. (I/O power supply required for both
Units.)
Required. (I/O power supply required for both
Units.)
Required. (I/O power supply required for both
Units.)
Required. (I/O power supply required for Expan-
sion Unit only.)
Required. (I/O power supply required for Expan-
sion Unit only.)
Section 5-5
101