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18
2.3.5.6 Input Circuits
Seven Fixed function Input circuits are provided for
the following functions:
MODE SELECT [Auto / Manual], MANUAL TRIGGER, HOLD,
ABORT, PRESSURE MONITOR, VALVE MONITOR and FLOW
MONITOR.
Four Programmable Function Input Circuits are
provided. Each input circuit is monitored for open
and short circuit conditions
– see typical
arrangement below.
EOL = 6800Ω. Maximum line impedance 50Ω.
Connect to volt-free switches / relay contacts only.
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6K8
470R
TYPICAL SWITCH
ARRANGEMENT
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6K8
6K8
470R
VALVE FULLY OPEN (NORMAL)
VALVE FULLY CLOSED
VALVE MONITOR SWITCH
ARRANGEMENT
The VALVE MONITOR input is used to monitor
the open / closed state of a mechanical valve
control device.
If the valve is in an indeterminate state (neither
fully open nor fully closed) for more than 30
seconds, the panel will indicate a fault
condition.
If unused, connect a 3300Ω (or 2x 6800Ω in
parallel) EOL across the terminals.
An end-of-line module (Exp-005) is
available to simplify the wiring. This
incorporates the end-of-line resistor and
the activation resistors
– see opposite.
470 ohm
Not used
Common
Break off TAB to remove 6800 ohm
end-of-line resistor
Exp-005
470 ohm
6800 ohm
Common
Break off TAB to remove 6800 ohm
end-of-line resistor
Exp-005
2.3.5.7 Actuator Output Circuit
The actuator output can be used to drive both
igniting (metron) style and solenoid style
actuators.
18.0
– 28.0 V DC, 1.0A
10
SUPERVISED. POWER LIMITED.
The circuit is monitored for both open and short
circuit conditions.
The output can supply a continuous 1A current for
solenoid style actuators or can provide a 3A
(15mS) pulse for igniting style actuators.
Output type is configurable - refer to Programming
section.
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(
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:
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9
8
B
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:
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9
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10
TOTAL OUTPUT LOAD (continuous) must not exceed panel supply rating
– maximum 2A.
