Key Technical Specifications
- Product Type: Single Channel Control Card
- Compatible System: Honeywell System 57 Rack
- Processor: Microprocessor-controlled with EEPROM storage
- User Interface: Front panel LCD display and LED alarm indicators
- Alarm Function: Compares signal against predefined limits, triggers relays
- Reset Mechanism: Dedicated front panel button for alarm reset
- Module Interface: Accepts plug-in sensor driver and analog output modules
- Configuration: Software-configurable via engineering card
- Application: Continuous gas monitoring and single-loop control
Product Introduction
The HONEYWELL 05701-A-0145 is a single channel control card designed for the System 57 gas detection platform. It serves as the localized processing unit for connected gas detectors, providing real-time control, LCD readouts, and alarm logic without requiring constant host communication.This microprocessor-driven card stores its configuration in EEPROM and continuously compares incoming sensor signals against predefined safety limits. The HONEYWELL 05701-A-0145 features a modular design that accepts plug-in sensor driver modules (for 4-20mA or catalytic sensors) and optional analog output modules for remote chart recorders.
Installation & Configuration Guide
Preparation (10 min)
- Verify the System 57 chassis slot assignment and backplane power.
- Identify the required sensor driver module (e.g., 05701-A-0283 for 4-20mA).
- Gather tools: #2 Phillips, anti-static wrist strap, engineering key.
Removal (5–10 min)
- Ensure the system is in a safe state. Disconnect field wiring if replacing the entire assembly.
- Remove the front panel mounting screws securing the card to the rack.
- Pull the card straight out from the backplane connector. Do not pry or twist.
- Self-correction: I initially forgot to mention the engineering key. You will need the engineering key to unlock configuration changes or perform sensor zero/span adjustments.
Installation (10 min)
- Align the HONEYWELL 05701-A-0145 with the designated slot. Push evenly until fully seated.
- Reinstall the front panel mounting screws to secure the card.
- Insert the appropriate plug-in sensor driver module into the J1/J2 connectors.
- Reconnect field wiring and verify terminal tightness.
Power-On & Test (10 min)
- Apply power. Observe the front panel LCD for boot-up sequence and sensor reading.
- Use the engineering card to verify alarm setpoints and sensor status.
- Trigger a simulated gas signal (or use test gas) to verify LED and relay activation.
- Test the front panel reset button to ensure alarms clear properly.
Troubleshooting Quick Reference
| Symptom | Probable Cause | Action |
|---|---|---|
| Blank LCD Display | Backplane power failure | Measure 24V DC at the card backplane connector. |
| No Sensor Reading | Missing driver module | Verify the correct sensor driver module is installed and seated. |
| False High Alarm | Sensor drift or wiring | Check field wiring for shorts. Perform zero calibration via engineering card. |
| LED Solid Red | Active Alarm Condition | Identify gas source. Use front panel button to reset after condition clears. |
| Config Changes Lost | EEPROM write failure | Reseat card. If persistent, the onboard memory may be failing. |
Dimensions, Mounting & Wiring Notes
- Form Factor: System 57 Single Channel Card
- Mounting: Front panel screws + backplane connector
- ⚠️ Warning: Never insert or remove plug-in sensor driver modules while power is applied.
- Wiring: Field wiring connects to the rear terminal blocks via the backplane interface.
- Clearance: Maintain adequate clearance in front for LCD visibility and button access.
FAQ
Does this card read sensors directly?
No. The HONEYWELL 05701-A-0145 requires a specific plug-in sensor driver module (e.g., 4-20mA or catalytic) to condition the raw sensor signal.Can I configure this without the engineering card?
Basic alarm reset is possible via the front button, but full configuration, setpoint adjustment, and calibration require the System 57 engineering card.What does the “A-0145” suffix indicate?
It denotes the specific hardware revision and regional configuration. Always match the full part number to ensure backplane and firmware compatibility.I see “05701-A-0301” in some docs. Is that the same?
No. 05701-A-0301 is the specific part number for the 4-20mA single channel control card variant. Verify which sensor type your application requires.How do I clear a latched alarm?
First, ensure the hazardous gas condition has cleared. Then press the dedicated reset button on the front panel of the HONEYWELL 05701-A-0145.What’s the warranty on refurbished units?
We provide a 1-year warranty on all tested units. Each card undergoes backplane communication testing, LCD verification, and alarm logic validation before shipment.Can I use this in a standard 19-inch rack?
No. This card is designed exclusively for the Honeywell System 57 specialized gas detection rack chassis.
