Operation Manual VISATRON® VN115/87plus EX
06/2016
Page 23
SCHALLER AUTOMATION
D-66440 Blieskastel / Saarland / Germany / Industriering 14 / P.O Box 1280
Industrielle Automationstechnik GmbH & Co. KG
Tel. +49(0)6842-508
-
0
/ Fax -260 / eMail: [email protected] / www.schaller.de
Figure 17:
Rear side of measuring head
Second 'Alarm' output and 'Ready' output must be connected to separate channels
on
vessel’s or power plant’s
alarm monitoring system. The 'Ready' relay is switched
on when OMD is in correct operation (see
).
Figure 18:
Wire break resistors
The optional pre-alarm output can be used to initiate either a pre-warning signal or
slow-down signal. The pre-alarm relay is switched on when the oil mist
concentration has risen up to 70% of the Oil Mist alarm level. Please note that
depending on the characteristics of an oil mist occurrence, the time between 'Pre-
alarm' and 'Main Alarm' could be only a fraction of a second.
Current values
of wire break
resistors
Fixing screws of
plastic cover
Plastic cover
Wire break resistors
Security seal
Jumper to select the
RS485 interface or
the 4 -20 mA output
