HIMA F9404 4-Channel Safety Relay Output Module for High-Current Switching in SIL 4 Systems

Product Description:

The HIMA F9404 is a 4-channel Safety Relay Output Module designed for the HIMA Planar4 safety system, engineered for high-current switching in SIL 4 safety loops. Unlike the logic-processing modules like the F3313 and F3225, the F9404 acts as the final control element, physically interfacing with the field to control high-power equipment like solenoid valves, motor starters, or alarm horns.

Using electromagnetic relays, the F9404 provides potential-free (dry) contacts, allowing it to switch external voltages such as 230 VAC or 120 VDC. It operates with a de-energize to trip logic, ensuring that a power loss or fault state safely shuts down the field devices.

Key Features:

• Potential-Free Contacts:
  Switches external voltages (e.g., 230 VAC or 120 VDC) while maintaining complete isolation from the 24 VDC logic system.

• Redundant Internal Design:
  Features safety-oriented relay circuits, ensuring that a single component failure does not prevent a safety shutdown, achieving fail-safe operation.

• High Switching Capacity:
  Capable of switching loads up to 4 Amperes, making it more robust than standard electronic output modules.

• Positive Safety Logic:
  Operates on a de-energize to trip principle, where an open circuit equals a safe or trip state, ensuring that the system defaults to a safe condition during faults.

Technical Specifications:

Functional Application:

The F9404 serves as the interface between the safety logic system and field devices, enabling the physical switching of high-power equipment. Here's how the logic chain typically works:

1. Input: A signal from a sensor (e.g., a pressure switch) enters the system through the F3313 Filter Module, where it is conditioned.

2. Decision: The F3225 AND Gate Module processes the signal and determines whether the system should engage or shut down.

3. Action: The F9404 Relay Output Module receives the logic signal, de-energizes, and opens the contact, cutting power to a safety-critical device (e.g., fuel shut-off valve).