4 Installation
Dr. Födisch
Umweltmesstechnik
AG
Page 18 of 30
Operation manual PFM 92 C
Version 3.0
4.4.3 Status
signals
The status signals are made as potential-free contacts. These contacts are only allowed
to be loaded with low voltage 24 V, max. 0,1 A.. The following status signals are provided
at the PFM 92 C:
Signals
Contact position
Failure
F
9 Failure elimination page 27
Normally closed (NCC),
in case of
failure
opened
Limit value 1
Normally closed (NCC),
in case of
limit value violation
opened
Limit value 2
Normally closed (NCC),
in case of
limit value violation
opened
Table 4.1: Status signals
4.4.4 Analogue
output
The analogue output of the PFM 92 C is made as 4 ... 20 mA output. An external
analogue separator has to be used for the galvanic isolation of the output signal. The
following signal can be provided by the PFM 92 C:
Analogue output -> dust in [%]
WARNING
Risk of device demolition (loss of warranty)!
The analogue output of the PFM 92 C is active! It must not be supplied with
voltage under any circumstances!
