afriso OM 1 Notice Technique page 71

5.5.2 Connecting the probes
The product OM 1 is shipped with a permanently connected photoelectric
probe. Do not extend or shorten the probe cable.
OM 5 and OM 5+1:
Use only 3 x 1 mm² cables to extend the probe cables. Use shielded
cables for lengths of more than 15 m. The maximum length of the probe
cables is 50 m. Use underground cables such as NYY 3 x 1.5 mm² for
underground cable installation.
Some of the photoelectric probes feature terminating resistors.
Verify that these resistors remain in place when you shorten the probe
cable.
Verify that the probe cable is sufficiently protected from damage, for
example by installing it in a metal pipe.
Verify that the probe cable is not routed immediately next to or together
with cables carrying mains voltage.
Connecting the photoelectric probes
1. Route the probe cable through the cable gland at the right.
2. Route the probe cable of the photoelectric probes to the appropriate
terminal block "Sonde 1" to "Sonde 5" and connect the wires in the fol-
lowing way:
- Brown to terminal GND
- Green to terminal OUT
- White to terminal IN
3. If a photoelectric probe is not connected:
Jumper the terminals "IN" and "GND" of this terminal block.
Connecting the floating probe (OM 5+1)
1. Route the probe cable through the cable gland at the right.
2. Route the probe cable of the floating probe to the terminals designated
"Min/Max". Connect the two wires to the terminals "IN" and "GND". Any
polarity is permissible.
Mounting
OM 5 / OM 5+1 / OM 1
EN
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