6
9
1
5
7 8
6
9
1
5
6
9
1
5
3
4
!
!
External Connections
58
HAAKE Phoenix II P1
Version 3.07
18. External Connections
Only use shielded cable (see chapter 18.5).
18.1 Interface RS232C
see chapter 19.
18.2 Multi--function connection
The multi--function connection (11) is on the rear of the
circulator. Different functions are available on the dif-
ferent pins of the 9 pole SUB--D plug. This has to be
considered when external units are connected.
18.2.1 Remote alarm
Potential free contact with the following pin assign-
ment:
Pin 7 = make contact
Pin 9 = middle
Pin 8 = break contact
Alarm relay in the circulator:
The relay contacts 9 and 7 are open in case of an alarm
and when the instrument is switched off.
Rating: max. 30 V
max. 0.1 A
18.2.2 Contact input for unit ON/OFF
Assignment of the Pins 5 and 6:
Voltage at Pin 5 and 6 = 0V:
Unit is switched ON
Voltage at Pin 5 and 6 = +5V: Unit is switched OFF
(+5V at Pin 5; Ground at Pin 6)
Control and pump are stopped.
18.2.3 Potential free contact for alarm triggering
Assignment of the Pins 3 and 4:
Pin 3 and 4 open = 0V: Unit is set on alarm; display
on the display: „Alarm
→
external“
Pin 3 and 4 glosed = +5V:
Unit works without ac-
cident.
Only switch Pin 3 and 4 with a potential free contact!
Do not connect external mass or voltage supply!
The shorting bridge at Pin 3 and 4 must be removed
before connecting the external alarm circuit.
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