Nova-Tech LMI Series HH Metering Pump - Manual (Page 41)

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HH7 Only
Switch or transistor must be capable of switching 2mA at
15 VDC. Minimum time in low impedance state (on) is 50 mSec.
Minimum time in high impedance state (off) is 100 mSec.
Remote On/Off (Opto-isolated Input) (HH9 Only)
Switching this line to ground starts the pump. Releasing this line,
stops the pump. The
START
STOP
(Start/Stop) key will always override the
Remote Start/Stop.
Reference: 4-Pin Cable (P/N 33796)
Pin 4 Red Remote ON/OFF
Pin 3 Green Ground
Switch Closed = Start Pumping
Switch Open = Stop Pumping
Switch must be capable of switching 2 mA at +15 VDC.
Minimum time in low impedance state (i.e. Switch closed) is
approximately one (1) second.
Low-Level Input (P/N 29190) (HH7 and HH9 Only)
Opening the float switch (i.e. breaking the line from ground) stops the
pump and activates the alarm output.
Float Switch Closed - Pump Running
Float Switch Open - Pump Stopped - Alarm Activated
Switch must be capable of switching 2 mA at +15 VDC.
Minimum time in low impedance state (i.e. switch closed) is
approximately 1 second. (For use with LMI Float Switches [P/
N 29190.]
Low-level input can be used as a remote start/stop in the HH7.
Appendix A