2.6
Remote and automatic control and operation
The 120U pump can be operated by controls external to the pump: manually by a switch or
potentiometer; or by an automatic control station.
You need not press the AUTO key unless you
wish to control speed remotely: remote stop/start, direction, DC tacho output and digital
alarm output are active in both manual and auto modes.
Check that the pump is ready to run before remote/automatic operation. Signals may start the pump
withoutwarning.
Never apply mains voltage to the 15-way D connector. Apply the correct
signals to the pins shown below. Limit signals to the maximum values
shown. Do not apply voltage across other pins. Permanent damage, not
covered by warranty, may result.
The pump can be stopped at all times by pressing STOP on the keypad,
whether it is in manual or auto mode.
Remote stop/start when AUTO has not been pressed
Fita switch between pins8and 13.
OR:
Apply a TTL logicsignalto pin 8, ground to pin 12.
Press
START
on thekeypad to enable remote stop/start.
See2.6.6Remote stop/startfor remote stop/startinstructionsafter
AUTO
hasbeen pressed
close to
stop
logic high
to stop
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