User manual

Publication 1747-UM011F-EN-P - May 2007
Setting Up the DH-485 Network 199
Below are three options for externally powering the 1747-AIC
interface.
• If the link coupler is to be installed in an office environment,
you can use the 1747-NP1 wall mount power supply or
1747-NP2 global desktop power supply. The link coupler would
be powered through either the 1747-C10 cable or by hardwiring
from the supply to the screw terminals on the link coupler.
• If you use any of the following chassis power supplies (1746-P1,
1746-P2, 1746-P4, 1746-P5, and 1746-P6), you can use the 24V
dc user power supply (200 mA maximum) built into the power
supply. The link coupler would be powered through a
hard-wired connection from the screw terminals on the power
supply to the screw terminals on the bottom of the link coupler.
• You can use an external dc power supply with the following
specifications:
– operating voltage: 24V dc +
25%
– output current: 190 mA
– rated NEC
The link coupler would be powered through a hard-wired
connection from the external supply to the screw terminals on
the bottom of the link coupler.
The figure below shows the external wiring connections and
specifications of the link coupler.
ATTENTION
If you use an external power supply, it must be 24V dc.
Permanent damage will result if miswired with wrong power
source.