Rockwell Automation 1770-KF3 DH-485 Communication Interface User Manual - Manual (Page 21)

Installing the KF3
Chapter 2
2Ć13
Auto-Answer: These modems have self-contained timeouts and tests,
and can answer and hang up the phone automatically.
The module has no means of controlling an auto-dial modem, but it can be
used in conjunction with a separate auto-dialer.
CAUTION: The KF3 must be set to the correct voltage before
it is powered up. Connecting to 115V power with the switch set
to 230V will result in erratic operation. Connecting to 230V
power with the switch set to 115V can damage the module.
The power select switch is located on the back panel. The switch is set at
the factory for 115V operation.
115V Operation
Ensure the switch is set to “115V” as shown in Figure 2.18. Plug the
power cord supplied with the KF3 into the connector on the back panel,
and plug the other end into any standard 115V AC outlet.
Figure 2.18
Power Select Switch Set for 115V Operation
ËËË
CAUTION: FOR CONTINUED
PROTECTION AGAINST RISK
OF FIRE REPLACE ONLY
WITH THE SAME TYPE
AND RATING OF FUSE.
CAUTION:
DOUBLEĆFOLD NEUTRAL
FUSES
FUSES: 0.1A 250V
TYPE 5mm X 20MM
Slide to right for
115V operation
Voltage Selection