Manufacturer: Honeywell
Product No.: 05701-A-0351
Country of origin:United States
Product Type: Gas Detection Control Cards
Payment: T/T, Western Union
Weight: 165g
Dimensions: 25.0 cm x 18.0 cm x 10.0 cm
Shipping port: Xiamen
Warranty: 12 months
Monitoring critical gas detection sensor loops within industrial processing environments is the primary role of the Honeywell 05701-A-0351 single-channel control card, a core component of the legacy Zellweger/Honeywell Analytics System 57 control architecture. This rack-mounted module interfaces directly with catalytic bead flammable gas sensors or standard 2-wire/3-wire 4-20mA transmitters. Designed to occupy a single slot in standard System 57 rack enclosures, the 05701-A-0351 processes incoming sensor analog signals, drives local multi-segment status displays, and controls dedicated alarm and fault relays to safeguard personnel and plant infrastructure.
| Manufacturer | Honeywell / Zellweger Analytics |
| Model Part Number | 05701-A-0351 |
| System Series | System 57 (5701) |
| Channel Capacity | Single Channel |
| Input Range Selection | Catalytic bridge sensor (constant current drive) or 4-20mA (sink/source) |
| Operating Voltage Range | 18V to 32V DC |
| Typical Power Consumption | 3.75 Watts |
| Electronic Temperature Drift | Less than +/- 2% of span over operating range |
| Alarm Relays | Three alarm levels plus dedicated Fault relay; SPCO contacts rated 5A at 250V AC / 30V DC |
| Display Interface | 3-digit liquid crystal display (LCD) with backlight and discrete status LEDs |
| Operating Temperature | -5 degC to +55 degC |
| Shipping Weight (Calculated) | 2.0 kg (including secure export protection packaging) |
| Net Unit Weight | 0.165 kg |
| Package Dimensions (Calculated) | 25.0 cm x 18.0 cm x 10.0 cm |
| Backplane Connection Path | Signal / Circuit Function |
|---|---|
| DC Power Input | +24V DC Field Power Supply & Common Return (0V) |
| Catalytic Sensor Terminal | 3-Wire catalytic bridge drive (NS, S, CC lines) with adjustable drive current |
| Analog Input (Transmitter) | Standard 4-20mA current loop input (configured for active or passive transmitter loop) |
| Analog Output (Isolated) | 4-20mA system repeat signal for external data loggers, DCS, or safety PLCs |
| Relay Interfaces | Common, Normally Open (NO), and Normally Closed (NC) contacts for A1, A2, A3, and Fault states |
The 05701-A-0351 serves as a direct replacement module within any Honeywell System 57 rack enclosure. If migrating from older legacy Zellweger control cards, ensure the backplane module (05701-A-0352 or similar) matches the pin footprint of this specific hardware revision. Note that while this is a single-channel card, it cannot be hot-swapped into slots assigned to multi-channel 5704 cards without reconfiguring backplane terminal jumpers and rack layout allocations.
When configuring the 05701-A-0351 for catalytic bridge sensors, precise adjustment of the bridge drive current is critical. Setting the drive current even slightly above the sensor's specified limit can permanently burn out the catalytic bead active elements. Always cross-reference the sensor's technical sheet before setting the potentiometer value. In high-density 19-inch rack installations, ensure that cooling fan units are operational; internal card temperatures can rise rapidly when multiple single-channel cards are powered simultaneously, leading to accelerated component aging and thermal drift issues.
During zero and span calibration, use the magnetic wand systematically to cycle the front-panel reed switches. Always verify that the control card has run through its thermal stabilization routine (minimum 30 minutes from cold start) before finalizing zero/span values. To prevent accidental trigger-offs of safety mitigation systems (e.g., deluge or ventilation paths), ensure the card's inhibit mode is fully active. The local LCD will flash an "Inhibit" or "INH" warning status to confirm that the output relays are blocked during testing.
Do not extract or insert this control card while the System 57 rack is powered. Live insertion (hot-plugging) can cause transient electrical arcs on the edge connectors, potentially corrupting EEPROM calibration data or damaging the sensitive catalytic bridge circuitry. Verify that the power isolation switch for the relevant rack segment is in the OFF position and that all residual field circuit capacitance has been discharged prior to hardware servicing.
Isolate Field Power: Turn off the primary +24V DC supply feeding the target System 57 rack panel. Tag out the circuit breaker to prevent accidental re-energization during maintenance.
Card Alignment: Align the upper and lower edges of the 05701-A-0351 PCB with the plastic card guides inside the target rack slot. Ensure the card is oriented correctly with the front panel display facing outward.
Secure Insertion: Gently push the card back until the DIN edge connector mates firmly with the backplane socket. Secure the front panel mounting screws to prevent mechanical vibration from loosening the card.
Sensor Parameter Verification: Before applying full load power, verify that the configuration jumpers on the rear backplane correctly match the connected sensor type (catalytic bridge versus 4-20mA loop configuration).
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| Country of origin |
United States
|
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