Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Channel Count | 1 monitoring channel |
| Input Types | 2-wire / 3-wire 4-20mA, catalytic bead bridge, electrochemical gas sensors |
| Nominal Supply | 24 V DC, range 18–32 V DC |
| Max Power Draw | 3.5 W |
| Relay Outputs | 3 configurable alarm relays, 1 dedicated fault relay |
| Mounting | System 57 rack backplane slot mount |
| Local Display | 4-digit backlit LCD plus bar graph |
| Operating Temperature | −10 °C to +55 °C, non-condensing |
| Weight | 0.35 kg |
| Compatible Sensors | Midas, Sensepoint and other Honeywell gas transmitters |
| Function | Gas concentration measurement, alarm threshold, fault supervision |
Product Introduction
The Honeywell 05701-A-0326 is a single-channel plug-in card for the Sieger System 57 gas monitoring rack. It reads gas concentration signals from field sensors and runs local alarm logic. It provides isolated relay outputs for shutdown, ventilation, or annunciation circuits. The on-board display shows live gas readings, and the fault relay trips for sensor breakage, wiring failure or card supply loss.
05701-A-0326
05701-A-0326
05701-A-0326
Application Scenarios & Field Experience
Many gas monitoring racks use mixed card revisions. If you fit the wrong variant, relay mapping and sensor excitation levels do not match, which creates silent unmonitored gas loops. This card is built to match the System 57 backplane for fixed gas detection.
- Refinery process areas: Toxic gas detection for hydrogen sulfide and carbon monoxide.
- Offshore platform utility modules: Flammable hydrocarbon gas monitoring.
- Semiconductor cleanrooms: Toxic specialty gas leak detection for cabinet exhaust.
- Chemical storage buildings: Oxygen depletion and flammable gas monitoring.
In my experience, a chemical storage facility had a 05701-A-0326 fail after corrosive cabinet atmosphere degraded the backplane connector contacts. The technician inserted the spare card into the vacant rack slot, set the matching alarm thresholds, calibrated the zero and span against the connected sensor, and verified all relay action before returning the loop to service. No gas alarm coverage was lost longer than the calibration window.
Standard Operating Procedure (SOP) for Quality Control
- Visual & Origin Inspection: Check OEM labeling, serial number, edge connector pins, and PCB cleanliness. Reject units with corrosion or burned relay traces.
- Live Rig Testing: Install in System 57 test rack, apply 24 V DC supply, simulate 4-20mA input levels, confirm alarm relay and fault relay actuation.
- Calibration & Revision Verification: Record hardware revision and default threshold range. Confirm compatibility with the target sensor type.
- ESD-Safe Packaging: Protect the gold edge connector, seal in static shielding bag, add foam padding, mark for ESD and hazardous-area handling.
Frequently Asked Questions (FAQ)
Q1: Can 05701-A-0326 swap directly with other 05701-A-xxx System 57 cards? A: Not all System 57 cards are interchangeable. The 0326 variant has fixed input conditioning for bridge and 4-20mA sensors. Always confirm the part suffix and sensor type before replacement. Q2: What warranty applies to this Honeywell 05701-A-0326? A: We offer a 12-month warranty. Warranty covers hardware defects under rated operating conditions. Damage from corrosive atmosphere, overvoltage on field wiring, or incorrect sensor excitation is excluded. Q3: Is this exact 05701-A-0326 variant stocked? A: This is a legacy gas detection rack card. Stock levels change often. Confirm lead time before scheduling gas system outage. Substitute cards may not preserve SIL-rated alarm logic. Q4: Do I need to recalibrate the gas sensor after replacing this card? A: Zero and span calibration must be re-run after replacement. Alarm thresholds are stored locally on the card, so settings do not carry over automatically. Q5: Can I hot-swap this card while the System 57 rack remains powered? A: Hot swap is supported on the System 57 backplane, but the associated gas loop will lose monitoring and fault relay status during the swap. Lock out linked alarm and shutdown circuits before removal.
