Model Number Explanation

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

A: Standard card assembly

0351: Single‑channel control card (with display & alarm)

Technical Specifications

Channels: 1 independent gas detection channel

Input Types: Catalytic bridge (pellistor) or 4–20 mA analog

Display: Backlit LCD (bar graph, peak hold, digital/alphanumeric)

Front Panel LEDs:

Red: A1 (low alarm), A2 (high alarm), A3 (fault)

Yellow: Fault, Inhibit

Green: Power

Front Panel Button: Alarm reset / card select

Remote Functions: Inhibit, remote alarm reset

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

Power Consumption: ~3.5 W

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

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

Operating Temperature: −40°C to +70°C

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

Dimensions: 112 × 25 × 102 mm (L×W×H)

Weight: ~0.18 kg

Certifications: CE marked; meets SIL 2 system requirements

Key Features

All‑in‑one single channel: Input, processing, display, and relays on one card

Dual input compatibility: Works with catalytic bead or 4–20 mA gas detectors

Local indication & control: LCD and LEDs for on‑site status; push‑button reset

Three alarm relays: Independent A1, A2, and fault outputs for flexible annunciation

Hot‑swap capable: Removable without disrupting other rack channels

High integrity: Isolated inputs/outputs; fault‑safe design for safety loops

Applications

System Role: Single‑channel gas detection controller for System 57 racks

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

Use Cases:

Independent gas monitoring (e.g., H₂S, LEL, CO)

High‑integrity safety loops (SIL 2)

Local alarm annunciation with remote signaling

Standalone detection in small or remote areas

Compatibility & Replacement

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

Field Devices: Catalytic bead (pellistor) or 4–20 mA gas detectors

Replacement Type: Direct drop‑in replacement

Legacy Status: Obsolete (EOL); available as refurbished/used stock

Quick Comparison (0326 vs 0351)

0326: Field Interface Card – 1‑channel input only (no display/relays)

0351: Single Channel Control Card – 1‑channel input + display + 3 relays