17
3.3
Input/Output Connections
Caution.
•
Refer to SPECIFICATION for Input/Output ratings.
•
Inductive loads must be suppressed or clamped to limit voltage swings
•
Operation of outputs is programmable – see Quick Reference Programming Guide for
details.
•
External isolators are not normally required as the pulse and alarm circuit is electrically
separated from all other AquaMaster connections.
•
Capacitive loads must be inrush current limited.
•
Fully-floating pulse outputs may be subject to static damage, e.g. connecting to a floating
datalogger, unless 'COM' is operated within its galvanic isolation range (
35V) from earth.
3.3.1
Frequency Outputs – Fig. 3.15
3
ELECTRICAL INSTALLATION…
Fig. 3.15 Frequency Output Connections
Fig. 3.16 Alarm Output Connections
Note
. Outputs 1 & 2 are not polarity sensitive. The common connection for these
outputs is designated ‘COM’.
Note
. Output 3 is not polarity sensitive. The common connection for these outputs
is designated ‘COM’. Alarm functions are available only with product software
versions:
1.1 (Release 1)
2.1 (release 2). See Programming Guide to determine
software version.
Telemetry, Electronic
Counters etc.
Counter/Totalizers
Forward Flow
and/or
Reverse Flow
1 2 3 4 5 6
1 2 3 4 5 6
I/P0V*
COM
O/P1
O/P2
PLC or Datalogger
COM
O/P1
O/P2
Common
Input 1
Input 2
COM
O/P3
Common
Alarm Input
3.3.2
Alarm Interface – Fig. 3.16
Summary of Contents for AquaMaster Explorer
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