
| HONEYWELL / CONTROL SYSTEMS | OverviewSpecificationsIntegrationRelated ModelsFAQ |
A four-channel System 57 control card for continuous 4-20 mA gas detector and transmitter signals. It combines channel processing, local gas-level display, alarm evaluation and rack-level communication in a compact control module.
| OPERATING PROFILE | |
|---|---|
| Product identity | 05704-A-0135 |
| Product category | Four-channel gas control card |
| System family | Honeywell Analytics System 57 / 5704 |
| Channel capacity | Up to 4 detector channels |
| Detector interface | Continuous 4-20 mA gas detector or transmitter loops |
| Display | Backlit multi-part LCD |
| Display modes | Analog bar graph, digital value and channel status |
| Alarm processing | Three configurable alarm levels |
| Alarm options | Individual, zoned, voted, master, delayed, update and rate-of-rise logic |
| Local controls | Alarm reset and engineering-card selection |
| Channel data | Gas reading, channel number and operating status |
| Sensor functions | Peak reading and sensor performance monitoring |
| Configuration storage | Non-volatile EEPROM |
| Rack formats | Full 19-inch or half 19-inch System 57 rack |
| System support | Engineering Card for configuration and calibration |
| Typical use | Fixed gas detection in process and utility areas |
| FIELD DETECTORS Four independent 4-20 mA detector loops provide continuous gas measurements. |
CONTROL CARD Microprocessor processing converts loop current into gas values and status. |
ALARM LOGIC Configurable thresholds, delay, voting and rate-of-rise functions drive responses. |
SYSTEM 57 RACK Engineering and interface cards support configuration, relay action and wider indication. |
| Q1 | Which detector signal is required? Confirm that each field detector or transmitter provides the 4-20 mA signal expected by the configured channel. |
| Q2 | What should be supplied for compatibility checking? Provide the full part number, rack type, installed interface assembly, detector type and existing card revision. |
| Q3 | Can catalytic detectors be connected directly? Use the control-card variant intended for catalytic bridge detectors; do not assume the 4-20 mA variant is interchangeable. |
| Q4 | How are alarm settings maintained? Channel setup is retained in non-volatile memory and is managed through the System 57 engineering functions. |
| Q5 | What should be checked after replacement? Verify channel scaling, zero, span, alarm thresholds, relay actions and detector-loop fault monitoring before returning the system to service. |
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