Advanced Multi-Loop SCR Power Controller

Advanced Multi-Loop SCR Power Controller
  • DIN Rail or Panel Mount
  • 30, 60, and 80KW Solid State Relays (Higher Amperages Possible With C4X)
  • 4 Main Universal Inputs
  • 4 Heat/Cool Independent PID Loops
  • 4 Main Outputs Internally Wired To SSR's
  • 4 Configurable Output Options Including Relay, Logic, TRIAC, Continuous
  • Current Transformers On Each Loop
  • 2 Configurable Relay Alarm Output
  • 2 Digital Inputs
  • Zero Cross Firing
  • Load Connections In Single Phase, Dual Phase, and Three Phase
  • Standard Modbus RTU Communication
  • 8 Optional Fieldbus Communications Including Modbus RTU, Modbus/TCP, Profibus, Profinet, Ethernet IP, DeviceNet, EtherCat, and CANopen Available
  • Powerful C-PWR Configuration Software
  • Optional Fuse Holder With Fast Acting Fuses For 30KW and 60KW models
  • Compact Footprint
  • UL, cUL, & CE Marking


The C4 Series Multiple Zone SCR Power Controller manages both single phase and 3-phase industrial healing load applications which require zero cross firing modes. Load options include up to 4 independently controlled single phase loads or two 3-phase/2-Leg load or one 3-phase/3-leg load (with or without an additional single phase load).

The controller features four universal main process inputs, two digital inputs, and two configurable alarm outputs as standard to accommodate a variety of process needs. When more flexibility is required, the C4 controller can be customized with four analog inputs, and up to four configurable outputs.

Despite the four independent zones, the C4 still boasts a compact footprint, with options for either DIN rail mounting or direct panel mount.


Modbus RTU/RS485 communications are outfitted by default, but with PLC’s and integrated networks being commonplace, the C4 can host a number of additional fieldbus communications including Modbus TCP, Profibus, ProfiNet, Ethernet IP, DeviceNet, EtherCat, and CANopen. Each of these fieldbus cards can be installed at time of order or outfitted at a later date. This makes it extremely easy to adapt the C4 to any host network.

Complete Process Control Package

While the C4 includes diverse process control capability, it also features efficient thermal and electrical monitoring, allowing users to anticipate failures and malfunctions so corrective steps can be taken in a timely manner.

With each zone outfitted with an independent current transformer, full diagnostics can be performed from loop break alarm, heater break, SSR short circuit, input opening or short circuit, and even over temperature alarm.

The C4 also features the powerful and detailed C-PWR configuration software, which allows you to run trends, save historical data and read or write device parameters quickly and easily. Configurations may be saved locally for later retrieval or sent across a network for cloning of other units. This significantly reduces mistakes and system setup time.

  • Packaging
  • Extrusion
  • Thermoforming
  • Injection molding
  • Heat treatment
  • Mold & dye heating/cooling
  • HVAC
  • Chemical Processing
  • Textile production
  • Multizone Furnaces
  • And many more...

C4 Configuration SoftwareThe C-PWR Configuration Software permits efficient programming of the following Chromalox SCR power controllers: CTF, CTF-Xtra, C4, C4-IR, CFW, and CFW-Xtra. It will facilitate the cloning of multiple controllers and fast parameter file uploads and downloads to and from the controller and PC.

Parameter value settings may be entered via the master table or through the Setup Wizard which methodically walks you through the main screens. Use the C-PWR Configuration Software Manual for program installation and connection details. To program your specific SCR controller, use the appropriate controller programming manual.

Current Release Version: 1.3.0
(Note: New configuration software releases occur without notice. If you need to update your release, you must first uninstall your current version prior to installing the latest release. This may be done in Programs and Features located in the Windows Control Panel.)

C-PWR Configuration Program Setup

Can't find what you're looking for?