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Model R8471 Series -Single-Channel Rack-Mounted Gas Controllers
The family of R8471 single channel controllers continuously monitor the analog 4 to 20 mA signal output from any Det-Tronics gas detector. Each R8471 controller provides at-a-glance visual indication from high visibility bar-graph and digital readout LED displays, high intensity alarm LEDs, and optional alarm relays. A variety of mounting racks and cages are available. Be sure to inquire about our special controller package for multi-point gas system cost-savings!
- Constant status and diagnostic information.
- Optional Relay output.
- Easily field programmable.
- FM and CSA approvals.
The R8471 Controller provides a continuous reading of the sensor input and features both a digital and a bar graph display, as well as high intensity alarm, FAULT and calibration LEDs. Controllers are offered with either solid state or relay outputs. Controllers equipped with relays also include a 4 to 20 ma output. Three independent alarm outputs with field selectable setpoints are provided.
- Controllers are available for detecting a variety of gases.
- Compatible with most sensors or sensor/transmitter combinations that generate a 4 to 20 ma input.
- Digital display, bar graph display, and high intensity LEDs indicate important system status information.
- Three alarm, one fault and one calibrate LED.
- Three alarm and one fault relay available.
- Continuous automatic self-diagnostics, with detected fault identified on digital display.
- Microprocessor based controller allows easy field programming of calibration gas concentration and alarm setpoint levels.
- AutoCal feature ensures easy and accurate sensor calibration.
- Current output is selectable for isolated/non-isolated operation.
- Remote reset capability.
- Rack compatible with Det-Tronics R7400 series flame controllers.
- Variety of racks available in 4U or 3U height configuration.
- 4 to 20 ma output available.
- Current output level while in calibrate mode is adjustable.
- Controller indicates when sensor is approaching end of life.
Outputs
The controller is furnished with three independent alarm outputs and one fault output. Each of the three alarm outputs has a field selectable alarm setpoint. The alarm setpoints can be checked and/or changed using pushbuttons located on the faceplate of the controller. The R8471 Controller is available in a Base version and a Premium version.
Base Model
The base controller is furnished with solid state (open collector transistor) outputs. The three alarm outputs are normally de-energized and become energized when their corresponding setpoints are reached. The fault output is normally energized and becomes de-energized upon detection of a system fault.
Premium Model
The premium model is furnished with a set of four relays in place of the four solid state outputs. The relays have SPST contacts.
This model also includes a 4 to 20 ma dc current output. The current output can be calibrated in the field to ensure maximum accuracy.