SEC PB4-DYI Isolated Digital Output Module

The SEC PB4-DYI is a high-reliability digital output module featuring reinforced isolation for each of its four output channels. Designed for industrial control applications where electrical noise immunity and safety are critical, this module ensures reliable switching of field devices while protecting the control system from ground loops and voltage transients.

Technical Specifications

Each of the four channels features a relay output with SPDT contacts, providing flexible switching configurations. The isolation voltage rating meets stringent industrial safety standards. Individual LED indicators provide real-time status of each output, while diagnostic functions report channel health to the host controller.

• Output Channels: 4 isolated relay outputs

• Contact Configuration: SPDT (Form C) per channel

• Contact Rating: 5 A at 250 V AC / 30 V DC (resistive)

• Isolation: Reinforced isolation (2.5 kV) per channel

• Channel-to-Channel Isolation: 1.5 kV

• Status Indication: Individual channel LEDs

• Power Supply: 24 V DC from system backplane

• Operating Temperature: -20°C to +60°C

Application Environments

The PB4-DYI is ideal for use in power generation facilities, chemical processing plants, and heavy manufacturing environments where electromagnetic interference is prevalent. Its reinforced isolation ensures reliable operation even when connected to field devices located hundreds of meters from the control cabinet.

Diagnostic Features

Built-in diagnostic circuitry continuously monitors output channel health and reports faults to the host system. This enables predictive maintenance and rapid fault isolation, reducing downtime in critical applications. The module's rugged construction ensures long-term reliability in harsh industrial conditions.