HIMA F3405 (4-channel Safety Relay Amplifier)

I. Basic Overview

Model: F3405

Brand: HIMA (Black Horse)

Series: H41q/H51q (HIQuad) Safety System

Type: 4-channel Fail-Safe Relay Amplifier Module

Safety Level: SIL3, AK6, Cat.4/PL e (TÜV Certified)

Applications: SIS/ESD/BMS/F&G, drives solenoid valves, relays, contactors

Installation: Standard rack slots, supports hot swapping

II. Core Electrical Parameters

Channels: 4 relay outputs (single-pole double-throw SPDT)

Contact capacity: 250VAC / 30VDC, 5A (resistive)

Switch voltage: ≤ 110VDC / 250VAC

Power supply from backplane: 24VDC, ≤ 1.5W

Operating temperature: -20℃ to +55℃

Protection: IP20

Size/Weight: Standard 4TE / approximately 1kg

III. Functions and Diagnostics

Safety mechanism: Fail-Safe, contacts safely open when power is lost

Drive capability: Directly drives 24V/48V solenoid valves, small contactors, alarm lights

Diagnosis: Channel-level self-diagnosis, detects coil/contact faults, short circuits, open circuits

Indicator lights: LED for each state, power/fault indicator lights

Isolation: Electrical isolation between channels, between system side and field side, strong anti-interference

IV. Typical Applications

ESD Emergency Stop System: Drive of critical valves / actuators

BMS Boiler Management: Fuel valve, igniter, purge valve control

F&G Fire Alarm System: Alarm horn, sprinkler valve, fire door interlock

High-reliability Interlock: Third-party system dry contact interface, safety barrier post-stage amplification

V. Comparison with the Same Series

F3405: 4-channel relay outputs, 250VAC/5A, SIL3

F3430: 4-channel safety relay, enhanced contacts, ≤ 110VDC/250VAC

F3332: 8-channel relay DO, passive dry contacts, 250VAC/30VDC

VI. Wiring and Maintenance

Input: 24VDC control signal from system side

Output: Common terminal (COM), normally open (NO), normally closed (NC)

Maintenance: Supports hot swapping, can replace without affecting the system; diagnostic information is readable