Note:
Serial enable is also a control input, it is not necessary in a system that operates under
parallel control. Make sure that there is no connection to the serial enable (pin 5).
Note:
To use the standby or fail parallel interface signals, make sure that the RS485 / RS232
slide switch is in the RS232 (default) position. Refer to
Connect the serial interface to the
customer control equipment on page 41
1.
To monitor an analogue output, connect the customer control equipment to the
pump analogue output (pin 9) and to the pin 2 of the customer logic interface
mating half.
When the pump is shipped, the analogue output is configured to monitor the
rotational speed of the pump. To monitor other parameters, configure the pump
again using the commands over the serial interface. Refer to
control and monitoring on page 41
for more information.
2.
To monitor the normal status output, connect the customer control equipment to
the normal status output (pin 15) and to the pin 2 of the customer logic interface
mating half.
You can use the output to control other devices in the pumping system. The output
can operate a low power relay of up to 24 V d.c. coil rating (up to 20 mA).
3.
To monitor the fail status output, connect the customer control equipment to the
fail output (pin 7) and to the pin 2 of the customer logic interface mating half.
You can use the output to control other devices in the pumping system. The output
can operate a low power relay of up to 24 V d.c. coil rating (up to 20 mA).
4.7 Connection for serial control and monitoring
In the serial interface, the pump is controlled through a number of serial commands or
the nST PC software. You can also check the operational status in the serial interface. In
the multi-drop mode, connection of more than one pump to a single serial port on the
control system is possible.
4.7.1 Connect the serial interface to the customer control equipment
The serial interface is available in RS485 or RS232 options. Use the slide switch (given
above the controller connector) to select the serial interface (refer to
). To adjust the slide switch, remove the plastic connector
cover of the controller and use a small tool to toggle the slide switch. Move the switch to
the right to enable RS232 serial interface. Move the switch to the left to enable RS485
serial interface. The default setting of the motor controller is RS232 serial interface.
Page 41
B85200880_D - Installation
