GE SR745-W2-P1-G1-HI-A-L-R-E Safety relay module

Specific Parameters

Electrical Parameters
Supply Voltage: 24V DC ±10%, supporting dual-channel redundant power supply (optional)
Safety Input Channels: 8 channels, supporting dry contact/PNP sensor signals (24V DC)
Safety Output Channels: 4 channels, relay output (250V AC/5A, 125V DC/5A), supporting force-guided contacts
Safety Level: Complies with SIL 3 (IEC 61508), PL e (EN ISO 13849-1), Cat. 4 (EN 954-1)
Communication Interfaces: 1 PROFINET Safety interface (IRT), 1 RS485 serial port (for fault diagnosis)
Control Response Time: ≤10ms (from safety signal trigger to output cut-off)
Power Consumption: ≤8W under normal operation, ≤10W in fault alarm state
Isolation Level: 2.5kV AC (1 minute) between input/output/power supply, optoelectronic isolation between safety circuit and communication circuit
Diagnostic Function: Supports channel short-circuit, open-circuit, overvoltage diagnosis, diagnostic coverage ≥99%
Environmental Parameters
Operating Temperature: -20°C to 70°C (non-condensing, normal startup from -20°C to 0°C)
Storage Temperature: -40°C to 85°C
Relative Humidity: 5% to 95% (non-condensing, continuous operation at 40°C/90% humidity)
EMC Immunity: Complies with EN 61326-1 (industrial grade), ESD protection ±15kV air discharge, ±8kV contact discharge
Vibration Resistance: 10-500Hz, 1g acceleration (IEC 60068-2-6 standard, sinusoidal vibration, each axis tested)
Shock Resistance: 20g acceleration, 11ms duration (IEC 60068-2-27 standard, half-sine shock, 3 times per axis)
Protection Class: IP20 (module itself, dependent on overall control cabinet protection)
Certification Standards: UL 508S (safety control equipment), CE, ATEX Zone 2 (requires safety barriers for explosive areas)
Mechanical Parameters
Dimensions: 175mm (L) × 100mm (W) × 60mm (H) (fits 35mm DIN rail or GE standard safety control cabinet slots)
Weight: Approximately 0.5kg
Mounting Method: 35mm DIN rail mounting or screw fixing mounting, supporting vertical/horizontal mounting
Housing Material: Flame-retardant reinforced nylon (UL 94 V-0 grade, oil-resistant, chemical corrosion-resistant)
Terminal Type: Spring-loaded crimp terminals (compatible with 16-24 AWG wires, tool-free wiring)
Indicators: Power (PWR, green), Safety Circuit Normal (SAFE, green), Fault Alarm (FAULT, red), Communication Status (COM, yellow/green), Input Channel Status Lights (green)

Product Performance

Adopting dual-channel safety circuit design, the input channels support “dual-channel cross-validation” to identify single-channel faults (e.g., wire breakage, short-circuit) and avoid false or missed actions; the safety output uses force-guided relays, which can cut off the hazardous circuit even if the relay contacts stick, complying with EN 50205 force-guided contact standard.

The control response time is ≤10ms, far lower than the response time requirement (≤200ms) for PL e level equipment in EN ISO 13849-1, enabling rapid cut-off of hazardous energy. The PROFINET Safety interface supports co-network transmission of safety data and non-safety data, and is fully compatible with GE Proficy Machine Edition software, enabling real-time upload of safety circuit status, fault codes and diagnostic reports for remote maintenance and safety auditing.

Built-in “safety parameter locking” function; after configuration, parameters can be locked via hardware key to prevent unauthorized modification; supports online fault simulation testing, which can verify the module’s fault response logic without disconnecting actual safety equipment, reducing downtime for testing. Industrial-grade wide-temperature design and anti-electromagnetic interference capability ensure stable operation in strong electromagnetic environments such as machine shops and automated production lines, with Mean Time Between Failures (MTBF) ≥1,000,000 hours (MIL-HDBK-217F, 25℃ environment).

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