Description

The HIMA F3236 is a high-performance, safety-certified digital input module designed for use in HIMA’s HIMax and HIQuad programmable electronic safety systems (PES). Engineered to meet the most stringent functional safety requirements, the HIMA F3236 provides 32 channels of 24 VDC wetted digital inputs with full galvanic isolation, enabling reliable acquisition of critical on/off signals from field devices such as emergency pushbuttons, limit switches, pressure switches, and fire/gas detectors. Each channel features built-in diagnostic capabilities that continuously monitor for wire breaks, short circuits, and signal validity—ensuring rapid fault detection without compromising process availability.

As part of HIMA’s modular I/O architecture, the HIMA F3236 integrates seamlessly into redundant or non-redundant HIMax chassis, supporting hot-swap replacement to minimize downtime during maintenance. Its compliance with IEC 61508 up to SIL 3 and IEC 61511 makes it ideal for safety instrumented functions (SIFs) in applications like emergency shutdown (ESD), burner management (BMS), and turbine overspeed protection. The module communicates real-time status and diagnostic data directly to the HIMax controller, enabling comprehensive system health monitoring via HIMA Engineering Studio or PASvisu visualization software. Whether deployed in an offshore platform, a nuclear facility, or a chemical reactor skid, the HIMA F3236 delivers uncompromising reliability and safety integrity.

HIMA F3236

Technical Specifications

Main Features and Advantages

Unmatched safety integrity with comprehensive diagnostics:
The HIMA F3236 goes beyond basic signal acquisition by embedding advanced diagnostics into every channel. It actively verifies the integrity of field wiring through continuous current monitoring, instantly flagging open circuits, short circuits, or degraded connections—critical for maintaining SIL 3 performance over time. This eliminates blind spots in safety loops and supports predictive maintenance strategies in high-risk environments.

High channel density with minimal footprint:
With 32 fully isolated inputs in a single module slot, the HIMA F3236 significantly reduces cabinet space, wiring complexity, and overall system cost compared to lower-density alternatives. This high integration is especially valuable in large-scale ESD or fire & gas systems where hundreds of discrete signals must be monitored reliably. Despite its compact size, the HIMA F3236 maintains robust electromagnetic compatibility (EMC) performance per industrial standards.

Seamless integration into HIMA’s safety ecosystem:
Designed exclusively for HIMax and HIQuad platforms, the HIMA F3236 benefits from native configuration in HIMA Engineering Studio, automatic hardware recognition, and synchronized redundancy management. In dual-channel (1oo2 or 2oo2) architectures, it supports cross-channel comparison for enhanced fault tolerance. Its hot-swappable design allows replacement during live operation—ensuring continuous protection even during maintenance interventions.

Application Field

The HIMA F3236 is a cornerstone component in safety-critical infrastructure across multiple high-hazard industries. In oil & gas upstream operations, it interfaces with subsea wellhead control panels, gathering station ESD valves, and flare ignition systems—processing signals from pressure high-high switches, level transmitters, and manual trip buttons to trigger safe shutdown sequences per API RP 14C. Its SIL 3 certification ensures compliance with rigorous offshore safety cases.

In power generation, particularly in nuclear and combined-cycle plants, the HIMA F3236 monitors turbine trip conditions, generator breaker status, and auxiliary system readiness. During abnormal events like loss of coolant or overspeed, it provides fail-safe input validation to the safety PLC, enabling rapid actuation of isolation dampers or fuel cutoffs. Similarly, in LNG export terminals, the HIMA F3236 forms part of the cryogenic pump and compressor protection logic, where failure could lead to catastrophic release.

Chemical and petrochemical facilities rely on the HIMA F3236 for reactor emergency cooling activation, toxic gas detection interlocks, and batch process abort triggers. For example, in a nitration unit, signals from temperature limit switches feed into the HIMA F3236, which then initiates quench injection if thresholds are exceeded. Municipal water treatment plants also deploy it in chlorine containment systems, ensuring automatic isolation upon leak detection. Across all these scenarios, the HIMA F3236 acts as the trusted first line of defense against operational hazards.

HIMA F3236

Related Products

F3237: 32-channel digital output module—complements F3236 for complete I/O coverage in safety loops
F3116: 16-channel analog input module—for temperature, pressure, or flow signals in mixed-signal SIFs
HIMax C Series CPU: Central processing unit required to operate F3236 in redundant or simplex configurations
F3011: Power supply module—provides conditioned backplane power for F3236 and other I/O cards
HIQuad System: Legacy HIMA platform—F3236 is backward-compatible with certain HIQuad chassis variants
PASvisu: HIMA’s visualization software—displays real-time status and diagnostics from F3236 channels
F3990: Redundant backplane carrier—enables dual-channel mounting for 2oo2 voting with F3236 modules