ABB KPM KB2 - Fiber optic cable and optional 4-20 mA connections

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Fiber optic cable is connected to the optics block. It does not matter which one of the two cables
is connected to the receiver inlet (Rx). In a normal application another cable is connected to the
RGB light source. IR light source is used in special cases such as heavy steam environment or in
an application where exceptionally strong light is needed.
Fig. 3.4. Fiber optic cable and optional 4-20 mA connections.
 Analog outputs are active and KPM KB2 feeds 15 V to the current loop.
 Analog outputs are isolated, but not from each other, and they all use the same filtering time.
Rx IR
Red/IR
Green Blue
RS-485
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i
e
l
d
RGB
OPTIC Cables
Optional 4 - 20 mA outputs
Optics block
Connect one fiber optic cable to Rx
Connect another cable to:
Rx = Receiver
IR = Infrared LED
- RGB if RGB light in use (normally)
- IR if IR light in use
NOTE: mA outputs are not isolated.
Use isolators in DSC or PLC.
Analog outputs
A B- + - + - +