- Brand: Allen-Bradley (Rockwell Automation)
- Model: Guard Master MSR117T
- Type: Safety Relay (Stop Category 0)
- Part Number: 440R-B23211
- Technical Specs:
- Core Application: Lower-risk safety monitoring loops designed for safety gate interlocks, e-stop buttons, and monitoring external contactors or expansion units
- Safety Integrity Parameters: Category 4 / PLe conforming to ISO 13849-1; SIL CL 3 conforming to IEC/EN 62061 / IEC 61508
- Functional Safety Data: PFHd: < 2.53 x 10^-9; MTTFd: > 425 years; Mission Time / Proof Test Interval: 20 years
- Operating Supply Voltage: 24 V AC/DC (0.85...1.1 x rated voltage, 50/60 Hz)
- Power Consumption: 2.0 W
- Input Channel Configuration: 1 N.C. (Normally Closed) single-channel input loop or 2 N.C. setup options depending on safety wiring method
- Input Resistance (Max Allowed): 25 Ω
- Reset Functional Modes: Configurable for Automatic/Manual reset or Monitored Manual reset loops via the X1-X2 feedback path
- Immediate Safety Outputs: 3 x N.O. (Normally Open) safety transistor/relay contacts featuring redundant internal armature links (Terminals: 13-14, 23-24, 33-34)
- Immediate Auxiliary Outputs: 1 x N.C. (Normally Closed) non-safety status contact used for PLC feedback signaling (Terminals: 41-42)
- Output Contact Thermal Current (Ith): Max 2 x 5 A or 3 x 4 A continuous configurations
- Switching Voltage / Current (Min): 10 V DC / 10 mA
- Utilization Categories (IEC 60947-5-1): AC-15: 5 A / 250 V AC; DC-13: 3 A / 24 V DC
- Recommended Output Fuse (External): 6 A slow-blow or 10 A quick-blow
- Rated Impulse Withstand Voltage (Uimp): 2500 V
- Operational Timing Matrix: Response Time: 30 ms max; Recovery Time / Power-On Delay: 110 ms / 1.0 second
- Mechanical Service Life: 10,000,000 operational switching cycles
- Diagnostic Indicators: Front panel array of 2 x Green LEDs: PWR (Power Status; flashes to indicate cross-loop fault blocks) and OUT (Output Status tracking contact closures)
- Connection Style / Wiring: Fixed (non-removable) box lug screw terminal block matrix
- Conductor Size Range: 0.2 mm² to 4.0 mm² (24 to 12 AWG) solid or stranded wire lines
- Tightening Torque Requirement: 0.8 N·m
- Case Housing Material: Red Polyamide PA 6.6 composite matrix
- Structural Mounting Format: Standard symmetrical 35mm DIN rail attachment layout
- Enclosure Protection Class: IP40 housing shell / IP20 finger-safe terminal block protection
Weight: 200 g
Dimensions: 110 x 80 x 24 mm
Country of Origin: Germany
HS Code: 8536.49.00