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Sulzer control system PCx

The PCx is a technically very advanced and powerful control system. The system is scalable, flexible and modular.The main difference between PCx and conventional PLC systems is the simplicity of installation and configuration.

The PCx has extensive control functions and is fitted with communication (RS 232 / 485), alarm handling, log capability (digital and analogue), stand alone control and decision making system.

The system can both control the application and be configured on-line simultaneously. PCx can be configured using the AquaProg software either via fixed line or dial-up communication.

The programming is very easy and time saving as all functions used for pumps, mixers, valve or cleaning device operation are predefined and can be linked and configured either on the operator panel or by the Windows configuration software AquaProg, with a screen similar to Windows® Explorer.

AquaProg also includes functions for reading actual signal status, read alarm list, reset alarms, up and download configuration etc.


  • Controls up to 16 pumps
  • Modular design
  • Simple installation and configuration by predefined software modules
  • Multiple communication possibilities

Multiple communication possibilities

Handling different types of communication is one strength of PCx. The unit handles communication via fixed line, dial-up, radio, LAN etc. It can also handle for instance dial-up communication via one com port to the SCADA system and using com port 2 with multi drop communication to other units.

PCx is, as the name indicates, a central unit with built-in I/O and can be expanded with separate I/O units type PCxp. When fully expanded with PCx and 7 PCxp units, the system handles the following I/O:

  • 128 digital in e.g. switches, contactors, actuators etc.
  • 64 digital out e.g. for control of pumps, mixers, valves etc.
  • 32 analogue in e.g. HSC level sensors, flow meters etc.
  • 16 analogue out e.g. frequency converters etc.

Examples of functions in PCx

  • Pump control
  • Pump capacity and flow calculations
  • Motor and valve control
  • Alarm handling
  • Log functions
  • GSM/GPRS/SMS-handling
  • PID-regulators
  • Timers and counters
  • Sequence control
  • Data register cross reference file

Technical specifications


Ambient operating temp 20 ºC to + 70 ºC
Ambient storage temp -40 ºC to + 85 ºC
Humidity 0-95% RH non condensing
Supply 9-34 VDC (max 0.2 A at 24 VDC), battery back-up of memory and clock
Analogue logging 32 channels up to 99 days/channel
Digital logging I/0 and up to 4096 alarm events
Configuration Via programming unit PCxop or from PC via AquaProg software
Protocols Comli and ModBus
Program memory Flashprom
Log and work memory RAM, internal batt. back-up
RTC Full data & time, internal batt. back-up

 Technical specifications

Central unit PCx and I/O-expansion PCxp  
Mounting DIN-rail 35 mm
Degree of protection IP 20
Housing material Aluminium
Communication RS 232/485 (115 200 baud)
Indication LED-diodes

Analogue inputs


Input resistance



0/4-20 mA

50 ohm

20 bits (0.025 μA)

Analogue outputs



Max load


0/4-20 mA

14 bits (1 μA)

1000 ohm (at 24 VDC)

Digital inputs




9-34 VDC (max 3.3 mA at 34 VDC) galvanically isolated via optocoupler in one group


Digital outputs





9-34 VDC (supply)

1A/output, max 4 A/module


 Technical specifications

Panel mounted operator panel PCxop and

Portable operator panel PCxoph




I/0-module connection CAN-bus, max 250 m cable
Display 20 characters/4 rows with backlight
Keyboard 16 keys for configuration and parameter setting
Status LEDs 4 system  16 user configurable