32
JMNC Operating Instructions
6 Setting the Rotational Speed Monitoring Device JMNC
Cover live parts in the vicinity to prevent any
contact.
Item
Description
Indication/Action
1
Disconnect the plant and prevent it from being
switched on again.
2
Make sure that the plant is free from any voltage.
3
Pull the rotational speed monitoring device (
9
) off
the base (
10
).
4
Bridge the relay contacts …
JMNC Bridge terminals 9 and 10.
JMND Bridge terminals 5 and 7 / 9 and 10.
… in order to avoid that the plant switches
off during the setting.
5
Plug the rotational speed monitoring device (
9
)
back onto the base (
10
).
6
Set the pulse selection switch (
2
) to the required
pulse range.
7
Turn the potentiometer Coarse (
6
) counter-clock-
wise up to the stroke.
8
Turn the potentiometer Fine (
3
) counter-clock-
wise up to the stroke.
Fine
±10%
