Model Number Explanation

05701: System 57 / 5701 series (Sieger gas detection system)

A: Standard card assembly

0361: Engineering / single‑channel control card (display + comms + I/O)

Technical Specifications

Channel: 1 × gas detector input (4–20 mA; optional catalytic bead)

Display: LCD (with bar graph, numeric readout, status icons)

Front Panel LEDs: Power, Alarm 1, Alarm 2, Fault, Inhibit

Relay Outputs: 3 × SPCO (Form C): A1, A2, Fault

Contact Rating: 5 A @ 250 VAC / 30 VDC (resistive)

Analog Output: 1 × 4–20 mA (retransmit gas concentration)

Communication: Modbus RTU (RS‑485) for remote monitoring/config

Power Supply: 18–32 VDC (nominal 24 VDC, backplane‑fed)

Power Consumption: ~1.5 W (typical)

Operating Temperature: −20°C to +60°C

Form Factor: 3U × 1” wide rack‑mount card (19” subrack)

Dimensions: 132 × 25 × 170 mm (H×W×D)

Weight: ~0.152 kg

Certifications: CE, TUV, UL 508, CSA

Key Features

Dual‑mode operation: Engineering mode for system-wide configuration; control mode for single‑channel gas monitoring.

Integrated I/O & display: Local readout and direct control via on‑card LCD/LEDs and pushbuttons.

Modbus RTU communication: Remote access to readings, status, and configuration; easy DCS/PLC integration.

Three alarm relays: Independent A1 (low), A2 (high), and fault outputs for safety annunciation.

Hot‑swap capable: Insert/remove without powering down the rack.

Calibration & diagnostics: On‑board tools for detector calibration, fault logging, and firmware upgrades.

Applications

System Role: Engineering tool + single‑channel gas detection controller for System 57 racks.

Industries: Oil & gas, petrochemical, power, pharmaceuticals, hazardous safety.

Use Cases:

System commissioning, calibration, and maintenance.

Standalone monitoring of H₂S, LEL, CO, etc.

Local alarm annunciation + remote Modbus RTU telemetry.

Small or remote monitoring points requiring display & control.

Compatibility & Replacement

System Compatibility: Honeywell System 57 (5701 series 19” subracks).

Field Devices: 4–20 mA gas detectors (catalytic bead compatible with option).

Replacement Type: Direct drop‑in replacement.

Legacy Status: Obsolete (EOL); available as new surplus or refurbished.

Quick Comparison (0351 vs 0361)

0351: Single‑channel control card (display + 3 relays; no Modbus; primarily for control)

0361: Engineering + single‑channel control (display + 3 relays + Modbus RTU; adds system‑wide configuration/maintenance functions)