Agilent Technologies TV70 Navigator 969-8970, User Manual

Page: 157 / 182

Technical Information
Interconnections
18
Controller TV70 Navigator User Manual / 87-900-956-01 (G) 157/182
Signal Description
START/STOP: input signal to start or stop the pump. With the
supplied cover connector the START/STOP (+) signal is connected to
the +24 Vdc pin and the START/STOP (-) signal to the GROUND pin:
in this condition the pump automatically starts as soon as the
controller recognises the input supply ("Plug & Pump").
INTERLOCK: input signal to control the pump rotation. With the
supplied cover connector the INTERLOCK (+) signal is connected to
the +24 Vdc pin and the INTERLOCK (-)signal to the GROUND pin.
SPEED SETTING: PWM input signal to set the pump speed. The
PWM signal characteristics must be the fol-lowing:
ƒ
frequency: 100 Hz +/-20%
ƒ ampitude: 0 - 24 V max
ƒ
duty cycle range: from 25% to 75% corresponding to a pump
speed from 250 Hz (25%) to 1250 Hz (75%) linearly.
Figure 7
If any signal isn’t applied (no connection) the pump speed is set to
“High Speed” (1250 Hz max and settable by window “120”).