M&C TechGroup PMA 100 Operator's manual - Manual (Page 31)

9-3.12-ME M&C Products Analysentechnik GmbH
- 31 -
15.Function of in- and output contacts and
alarms
The following in- and output contacts are available at the
Sub-D socket X4 at the back panel of the analyser
(specification see 8.2.2):
• 4 binary inputs,
• 4 relay output contacts,
• 1 common relay alarm contact, and
• 1 common relay status contact.
The binary inputs can be reserved for the following funct–
ions (configuration see 12.4.9):
• external alarm: an external alarm signal, e.g. a cooler- or
liquid alarm from the conditioning system upstream the
analyser, can be locked on. This signal releases a respec–
tiv alarm message (alarm LED and display on the front
panel of the PMA100). If one of the output contacts is
locked on with ‘external alarm’ (see 12), the input signal
is passing through.
• set span: the measuring ranges 1 to 4 can be chosen
externally.
• autocalibration offset and autocalibration: starting signal
for the autocalibration functions.
• reset of stored alarms: alarms which are kept after the
release (see 12.4.8) can be resetted with a pulsed signal.
The function of the output contacts are as follows (configu-
ration see 12.4.8):
• measuring range: this function gives a feedback about
the current active range. The ranges 1 - 4 can be selected.
• conc. alarm: it is possible to lock max. 4 concentration
alarms on the relay outputs (configuration see 12.4.11).
• calibration: a signal is given when the analyser works in
the calibration mode.
• flow alarm: in addition to the internal signals like alarm
LED, display or status contact the flow alarm can be
locked on one of the relay output contacts.
• external alarm: an external alarm signal can be passed
to one of the relay output contacts (see above).
Alarms are signalised via the alarm LED and the analyser
display. In addition to this a common alarm relay contact is
available. An exception is the concentration alarm. The
alarm limits are fixed in menu point 12.4.11. The display of
the concentration alarm (alarm LED, analyser display, com-
mon output or status alarm) must be confirmed separately
in menu point 12.4.11. An allocation of the concentration
alarm can be realised via the relay contact outputs (see
above).