F 7133 | HIMA 4-Fold Power Distribution Module | HIMatrix Safety Series

Technical Overview

The F 7133 (Part Number: F7133) is a high-reliability power distribution unit designed to manage and protect electrical circuits within HIMA safety-related systems. This 4-fold module provides isolated power routing for peripheral field devices, ensuring that faults are contained through localized fusing. By integrating relay-based switching and precise current monitoring, the F 7133 prevents voltage seepage during supply failures, maintaining the integrity of SIL 3 control loops.

Detailed Specifications

The following technical parameters define the electrical performance and safety limits of the F 7133 distribution assembly:

• Distribution Channels: 4-fold independent power circuits

• Fuse Protection: Supports up to 4 A slow-blow fuses per channel

• Relay Switching Latency: Approximately 100 ms response time

• Relay Contact Rating: 30 V DC at 4 A continuous load capacity

• Tripped Fuse Safety: 0 V residual voltage and 0 mA residual current leakage

• Supply Failure Protection: Maximum 3 V residual voltage and less than 1 mA residual current during supply loss

• Logic Power Consumption: 24 V DC at 60 mA nominal operating current

• Form Factor: 4 TE (Total Units) space requirement for rack mounting

• Gross Shipping Weight: 2.0 kg

• Construction: Industrial-grade modular housing with safety isolation

Operational Application

The F7133 is primarily utilized in safety instrumented systems (SIS) where power to sensors or actuators must be segmented. Its design ensures that:

• A single channel failure or blown fuse does not impact the remaining three power paths.

• Relay-driven switching provides a physical break in the circuit for maintenance or emergency isolation.

• The "slow-blow" fuse characteristic allows for momentary inrush currents common in inductive loads without nuisance tripping.

Frequently Asked Questions

How does the F 7133 handle residual energy if a fuse is blown?Unlike standard distribution blocks, the F7133 is engineered for safety-related applications, ensuring absolute zero voltage and current leakage (0V/0mA) once a fuse is tripped, preventing false signals to the safety controller.

What happens if the main 24V supply is lost?The module is designed with high-impedance isolation that limits residual voltage to under 3V and current to less than 1mA, effectively keeping connected field devices in a "Safe State."

Functional Comparison

• F7133: 4-fold distribution with relay switching and 4A load capacity per channel.

• F7131: Standard distribution module without integrated relay switching, typically used for passive routing.

• F7126: High-density power distribution for lower current logic signals.