RLH Industries, Inc.
936 N. Main Street, Orange, CA 92867
Phone: 800-877-1672
FAX: 714-532-1885
email: [email protected]
www.fiberopticlink.com
Fiber Optic Link
RLH Industries, Inc.
The leader in
rugged, fiber op�c
technology
USER GUIDE
When connec�ng a 4-wire transmi�er to the RLH fiber transmi�er (AD-420TX-XX-X), the RLH transmi�er is always a
sinking input, expec�ng the source voltage or current to be supplied by the remote device.
4~20mA System – 4-Wire Transmitter Wiring
When connec�ng a 3-wire transmi�er to the RLH fiber transmi�er (AD-420TX-XX-X), the RLH transmi�er is always a
sinking input, expec�ng the source voltage or current to be supplied by the remote device. The common terminal
can be used from the transmi�er. If used, it should connect to the nega�ve terminal of the fiber transmi�er and the
nega�ve terminal of the power supply.
4~20mA System – 3-Wire Transmitter Wiring
Applications (cont’d)
