Model Number Explanation

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

A: Standard card assembly

0511: Single‑channel control card (basic display, no Modbus)

Technical Specifications

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

Display: LCD (4‑character numeric + bar graph; no advanced icons)

Front Panel LEDs: Power, Alarm 1 (A1), Alarm 2 (A2), Fault, Inhibit

Pushbuttons: Alarm reset / card select

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: None (no Modbus RTU; no digital comms)

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

Power Consumption: 3.25 W (4–20 mA input); 3.75 W (catalytic bead)

Alarm Setpoint Resolution: 1% FSD

Operating Temperature: −20°C to +60°C

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

Dimensions: 110 × 53 × 30 mm (H×W×D)

Weight: ~0.18 kg

Certifications: CE, TUV, UL 508, CSA

Key Features

Single‑channel monitoring: Dedicated to one gas detector (H₂S, LEL, CO, etc.)

Basic local HMI: Simplified LCD + LEDs for concentration, alarm, and fault status

Three alarm relays: Independent A1 (low), A2 (high), and fault outputs

4–20 mA retransmit: Analog output for connection to DCS/PLC

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

Cost‑optimized: No Modbus, minimal display—for standalone, non‑networked points

Applications

System Role: Basic single‑channel controller for System 57 gas detection racks

Industries: Oil & gas, petrochemical, power, water treatment, pharmaceuticals

Use Cases:

Standalone gas monitoring (no remote communication required)

Local alarm annunciation with beacon/horn

Small or remote monitoring points needing only local display/control

Cost‑sensitive projects without DCS/PLC integration

Compatibility & Replacement

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

Field Devices: 4–20 mA gas detectors; catalytic bead sensors (with option)

Replacement Type: Direct drop‑in replacement

Legacy Status: Obsolete (EOL); available as refurbished/used stock

Quick Comparison (0511 vs 0351 vs 0361)

0511: Single‑channel, basic LCD + no Modbus, 3 relays, 4–20 mA out

0351: Single‑channel, full LCD + no Modbus, 3 relays, 4–20 mA out

0361: Engineering + single‑channel, full LCD + Modbus RTU, 3 relays, 4–20 mA out