I. Model and Basic Information

Model: F4204 (Material Number: 98 1420402)

Brand/Series: HIMA Black Horse / Planar F (Hardwired Safety System)

Function Type: Safety-related or door module (6 inputs → 1 output logic or)

Safety Level: SIL2, PL d, AK4, Cat.3 (TÜV Certified)

Status: Production discontinued since 2012-04-01, support terminated on 2022-03-31, alternative models available

Installation: Standard Euro Card (4TE), Rack-mounted, Non-hot-swappable

II. Channels and Electrical Parameters

Input: 6 channels (24VDC, high level valid)

Output: 1 channel (24VDC/250mA, transistor, short circuit protection)

Pre-circuit: 5 diode pre-circuit units, reverse voltage protection, fault isolation

Power supply: 24VDC (18~30V), power consumption ≈ 130mA

Isolation: Electrical isolation between input/output, withstand voltage 1500Vrms

Operating temperature: 0℃ ~ +55℃

Size/Weight: 40mm×185mm×128mm / approximately 0.32kg

III. Core Functions

6 Input Logical OR: Any input high → output high; all inputs low → output low, used for multi-condition safety triggering (such as multiple emergency stops, multiple alarm contacts).

Fault Safety Design: Output safely disconnected (low level) when power loss / fault, in line with SIL2 principle.

Self-Diagnosis: Power supply, output short circuit, open circuit detection, LED indication when fault occurs.

Redundancy Adaptation: Can be connected in parallel with two modules to enhance availability.

IV. Typical Applications

ESD Emergency Stop: Summarization of multiple on-site emergency stop buttons, pressure / temperature switch signals, triggering interlock.

F&G Fire Protection System: "Or" logic of multiple flame detectors, gas detectors signals, start fire protection.

BMS Boiler: Trigger fuel cut-off based on multiple safety interlock conditions (water level, pressure, temperature).

Hardwired Safety Circuit: Independent realization of safety logic without relying on PLC, in line with SIL2 requirements.

V. Comparison with the Same Series (Quick Differentiation)

F4204: 6-channel OR gate, logical arbitration, SIL2, dedicated for hardwired connections.

F4111A: 4-channel safety gate control, CPU and I/O isolation, SIL3, F35/F40 system.

F3DIO20/802: 20DI + 8DO mixed I/O, directly connected to the field, SIL3.

F3422/F3423: 8-channel relay output, large-load actuator, SIL3.

VI. Alternative Suggestions

Original Manufacturer's Replacement Model: 42300 (functionally compatible, pin not compatible, requires re-wiring).