PC-based process stations
The most used one is the IPCT.1, a process station with a 8“ LCD touch screen. It contains following interfaces:
2x RS232 (COM1, COM2)
1x audio (line out)
For applications where HMI is not required the IPCB.1 can be used, which has 3 serial ports. IPCB.1 is suitable e.g. as a data concentrator for more M-Bus lines.
IPCT.1 is installed into panel door or any other suitable box. Make sure that there is sufficient air circulation for cooling, especially around the back part and sides of the unit. In most cases, apertures in the panel with no forced air circulation are enough. When installing into watertight plastic boxes, air circulation holes in the upper and lower part of the box are necessary.
The front panel aperture shall be of 222 x 167 mm, panel thickness 10 mm maximum. Part of delivery are six metal clamps which fix the process station from the inner side of the panel door.
The process stations are powered either from
- attached switching power supply 230 V AC / 12 V DC, or from
- a stabilised power supply of 11 … 28 V DC in the panel providing at least 35 VA extra power.
Remember to install a 230 V / 6 A power socket in the panel for the power adapter.
As the IPCT.1 is equipped by RS232 ports, to connect to a bus with the I/O modules, a RS232 / RS485 converter is necessary, e.g. domat M012. The converter provides a galvanic separation between the RS485 (I/O bus) and COM ports of IPCT.1.
The converter has two screw terminals to connect the RS485 bus: K1+, K1-. Close to the connector are two BUS END switches used to terminate the bus.
The converter is powered through terminals 1 and 2 by 10..35 V DC, or 12…24 V AC. If the converter is located in a separate box together with the process station (at the managers’ office, in a reception etc.), and the I/O modules are in a remote epanel close to the controlled technology, the converter may be powered from the same power source as the IPCT.1. If the converter is in the panel together with I/O modules, it is powered from the same transformer or power supply as the I/O modules.
The converter is connected to the process station using a zero modem cable, terminated by 2x CANNON9 F connectors. The cable is supplied on request free of charge together with the M012.
The baudrate is set by DIP switches, accessible after the upper cover is removed. The default communication speed is 9600 bps, 8 bit, which is also the default for the Domat I/O modules.
Other devices, like GSM modems for sending and receiving of SMS messages, are connected using cables which are part of delivery of these devices. If connecting 3rd party devices, make sure that the communication bus is protected from other voltage.
If a GSM modem or router is part of the installation, remember to install a 230 V power socket for the power adapter supply, and enough space in the panel, especially in the installation boxes with IPCT.1 where there is usually not much space left.