HIMA VR-H4135 Safety Relay

I. Basic Model Information
Full model: VR-H4135 (referred to as H4135), material code 992413502
Upgrade version: H4135A (material 992413560, with a reset button on the exterior, compatible with the old model)
Brand: German HIMA (Black Horse)
Category: DIN rail-mounted SIL3 safety-related relay, independent safety loop monitoring module, not part of HIMax/HIMatrix rack CPU/I/O cards, is a standalone safety unit on-site
Power supply: Standard 24VDC ±15%

Safety Certification Levels
IEC 61508: SIL 3
ISO 13849-1: PL e, safety category Cat.4
TÜV Rheinland certification, CE, UL, ATEX Zone 2 explosion-proof available
Meets ESD, F&G, mechanical safety door, emergency stop circuit fault safety requirements

Hardware Wiring and Core Functions
1. Loop Architecture (1oo2 dual-channel safety voting)
Input Loop (24VDC): F, K two safety contacts (emergency stop, safety door, light curtain), dual-channel independent detection, single-channel open/closed immediately triggers safety cut-off
Monitoring Loop A: Internal self-check channel, continuous verification of contact sticking, coil failure
Safety Output Contacts: Two series-connected normally closed safety contacts (250VAC/2A load), forced open in case of fault, cuts off equipment power
Indicator Lights: Yellow fault diagnosis LED, intuitive display of loop open/closed, module own fault
Manual Reset: H4135A with a button reset; old model VR-H4135 requires power-off reset / external reset signal
2. Protection Diagnostic Capability
Cross-checking of dual channels, detection of contact sticking, circuit break, ground short
Continuous self-diagnosis of internal coils, drive circuits, diagnostic coverage > 99%
Fault-safe failure mode: Any hardware abnormality, output contacts open and stops the machine

Electrical Environment Specifications
Installation: 35mm standard DIN rail
Protection: IP20, installed in control cabinet
Operating Temperature: -20℃ ~ +60℃
Storage Temperature: -40℃ ~ +85℃
Anti-vibration / shock: Complies with industrial high-level tests, MTBF ≥ 150 million hours
Output Contact Capacity: AC-15 250V / 2A; DC13 24V / 2A

Model Differentiation: H4135 vs H4135A Table
Model Part Number Reset Method Appearance
VR-H4135 992413502 Power-off reset No knob, only indicator light
H4135A 992413560 Panel knob manual reset Has a black reset knob on the front, fully compatible

Typical Application Scenarios
Machinery industry: Press machines, robots, safety doors for automated production lines, emergency stop buttons, safety light curtain monitoring
Process industry: Chemicals / Oil and Gas F&G flame gas circuits, small skid-mounted equipment ESD emergency stop
Boiler combustion system: BMS burner safety interlock, valve position feedback safety detection
General equipment: Fan, compressor safety protection circuits, SIL3 safety functions can be achieved without the entire HIMA rack
Seven. Comparison of Similar Models in the Same Series
H4116: 4A contact capacity safety relay
H4122: General dual-channel safety relay
H4136: 48VDC power supply version, the rest of the logic is the same as H4135