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Section 4 Operation
MultiFunction Port
Standard I/O
DB-15HD
11 12 13 14 15
6 7 8 9 10
1 2 3 4 5
11 12 13 14 15
6 7 8 9 10
1 2 3 4 5
4-16
Alarm Output Pins 13(+) and 3 (-) Open Collector Output
This output turns on (conducts) when there is an alarm. Any alarm that
turns off the circulator will also set this output. An alarm message is
displayed. (Maximum current on the output cannot exceed 25mA and 24
VDC.) A resistor must be supplied to limit the current, see samples below.
5 vdc
13
3
External Alarm Input Pins 12(+) and 2 (-)
To enable this input, apply 10 - 20 mA to pins 12 and 2. This input turns
off the circulator. The alarm continues to sound until the input is removed.
See samples below.
External On/Off Input Pins 11(+) and 1 (-)
To enable this input, apply customer supplied 10 - 20 mA to bath pins 11
and 1. This input turns the circulator on and off. A message is displayed
when the input turns off. The circulator logic is reversed for this input:
conducting = circulator off, not conducting = circulator on. See samples
below.
5 vdc
Samples:
11 or 12
1 or 2
GND
ON STATE Current = 10 - 20 mA
392 Ω
Out
GND
External Alarm
please remove reason
and press ENTER
to clear message
External Signal
Operation Stopped by
external command
12 vdc
11 or 12
1 or 2
GND
24 vdc
1.5K Ω
13
Out
3
GND
24 vdc
11 or 12
1 or 2
GND
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