HIMA K1412B / H51q-HRS Safety Controllers (996141261 / 997205233)

The HIMA K1412B (order number 996141261) and H51q-HRS (type B5233-2, order number 997205233) are compact, high-integrity safety controllers belonging to the HIMatrix family. Designed for applications requiring SIL 3 (IEC 61508) and PL e (ISO 13849-1), these all-in-one units combine a fail-safe CPU, onboard digital and analog I/O, and multiple communication interfaces in a rugged, space-saving housing. They are ideal for small to medium-sized safety instrumented functions where a modular rack system would be overkill, offering a cost-effective solution without compromising safety. The K1412B and H51q-HRS are functionally similar variants tailored to different regional or application-specific requirements.

Key Features

• Integrated I/O: Typically includes 16 fail-safe digital inputs, 12 fail-safe digital outputs, and 4 analog inputs (configurable).

• SIL3 / PL e Certified: Suitable for high-risk applications in both process and machinery safety.

• Multiple Communication Interfaces: Dual Ethernet ports (Modbus TCP, PROFINET, HIMA safe Ethernet), RS-485 (Modbus RTU), and CANopen.

• Compact Design: DIN-rail mountable, 90 mm wide, ideal for control cabinets with limited space.

• Flexible Programming: Programmed with HIMA's SILworX using certified function blocks for valves, motors, sensors, and logic.

• Wide Operating Temperature: -20°C to +70°C, suitable for harsh environments.

Technical Specifications

• Power Supply: 24 VDC ±20%

• Digital Inputs: 16 (fail-safe, 24 VDC, type 3)

• Digital Outputs: 12 (fail-safe, 24 VDC, 0.5 A each, short-circuit protected)

• Analog Inputs: 4 (4–20 mA or 0–10 V, 12-bit, fail-safe)

• Communication: 2× Ethernet (10/100), 1× RS-485, 1× CAN

• Cycle Time: ≥ 10 ms

• Safety Integrity: SIL 3 (IEC 61508), PL e (ISO 13849-1)

• Operating Temperature: -20°C to +70°C

• Certifications: TÜV, CE, UL, ATEX (Zone 2)

Applications

These controllers are used in a wide range of industries, including chemical, petrochemical, oil and gas, power generation, and manufacturing. Typical safety functions include emergency shutdown (ESD), fire and gas detection (F&G), burner management (BMS), high-integrity pressure protection (HIPPS), and machine safety interlocks (e.g., emergency stop, light curtains). Their compact size makes them especially suitable for skid-mounted systems, packaged equipment, and remote terminal units (RTUs).

Integration and Configuration

Engineering is performed using HIMA's SILworX software, which provides an intuitive environment for developing safety logic using function block diagrams (FBD), ladder logic (LD), or structured text (ST). The controllers communicate with higher-level control systems (DCS/SCADA) via Modbus TCP or PROFINET, while safety-related data exchange with other HIMA controllers uses safe Ethernet protocols. The onboard I/O can be expanded locally with additional I/O modules connected via the backplane.

Reliability and Diagnostics

The K1412B and H51q-HRS feature extensive onboard diagnostics, including processor self-tests, memory checks, I/O monitoring, and communication supervision. Any detected fault forces outputs to a safe state and generates a diagnostic message. The units are designed for high availability, with mean time between failures (MTBF) exceeding 100,000 hours. Their rugged construction meets IP20 protection for control cabinet installation and withstands vibration and electrical noise per IEC standards.

With their compact form factor, integrated I/O, and full safety certification, the HIMA K1412B (996141261) and H51q-HRS (997205233) safety controllers deliver reliable, cost-effective safety automation for a wide variety of applications.