3.1 ON/OFF remote control

By interlinking contacts no. 4 and 5 of the socket at the rear of the pump (see figure 71 and section 7.2), the pump will be blocked and both direction indicating LEDs will be switched off.

The same effect can be obtained by applying a voltage from 3 to 12 V DC to contact no. 5 (at the same time the 0 line must be connected to contact no. 3).

Remark: In some cases a reversed logic for the remote control might be desired. Please contact us in this case.


3.2 Remote control of the pump speed

The VIT-FIT syringe pump can be controlled over the whole speed range by an external signal (0–10 V, or as an option 0–20 or 4–20 mA). The plus pole of the signal is connected to contact no.1, and the 0 line to contact no.3.

Press the REMOTE button on the front panel. The corresponding LED diode will light and the display will indicate the approximate voltage of the external signal. This indication may become unstable when no external connection is made and indicates the high sensitivity of the electronics.

! For safety reasons the voltage of the external signal must not exceed 48 V to earth!


3.3 PC control

If the instrument has been equipped with the optional RS-232 or RS-485 interface, it can be controlled digitally, e.g. from a PC by PNet control software.

Disconnect the pump from the mains. While keeping the direction button ◄|► pressed connect the pump to the mains again. The message “A” and two numbers will appear on the display. This number from 00 to 99 is the current address of the pump. To change the address press the buttons Λ Λ Λ under the display until the desired number is obtained. To confirm the address and save it, press the ON/OFF button.