Honeywell VBUS2/R/20 SIL-Certified 20-Channel Digital Output Module

Overview

The Honeywell VBUS2/R/20 is a 20-channel digital output module designed for high-reliability safety applications within Honeywell Safety Manager and Experion PKS systems. Engineered for SIL2/3 certification, this module provides discrete control for mission-critical processes, including emergency shutdown (ESD), fire & gas (F&G), and safety interlock systems. Rugged construction and integrated diagnostics ensure continuous operation in harsh industrial environments.

Technical Specifications

General

• Manufacturer: Honeywell

• Model: VBUS2/R/20

• Product Type: SIL-Certified Digital Output Module

• Typical Use: Safety Manager / Experion PKS Systems

• Country of Origin: USA or Japan (batch dependent)

Electrical

• Output Channels: 20

• Output Type: 24 V DC Digital Output

• Maximum Output Current: 1.0 A per channel (loop-monitored variant)

• Channel Monitoring: Loop-monitoring on select variants

• Supported Field Devices: Relays, solenoids, alarms, indicators

Safety & Compliance

• SIL Certification: SIL2 / SIL3 capable depending on system configuration

• Diagnostics: Built-in fault detection and LED status indicators for channel health

• Applications: ESD, F&G, critical interlocks, safety instrumented functions

Mechanical

• Dimensions: 270 × 201 × 150 mm

• Weight: 2.8 lbs

• Mounting: Standard Honeywell module rack installation

Environmental & Reliability

• Rugged design for industrial environments

• LED indicators provide visual channel and module status
  

Key Features

• 20 high-reliability digital output channels

• SIL2/3 certified for safety-critical applications

• Loop-monitoring available in specific variants

• Integrated diagnostics with front-panel LEDs

• Seamless integration with Honeywell Experion PKS and Safety Manager

Applications

The VBUS2/R/20 module is ideal for:

• Emergency Shutdown (ESD) systems

• Fire & Gas (F&G) safety monitoring

• Critical interlocks in industrial processes

• Safety instrumented functions in refineries, chemical plants, and power generation

FAQ

Q: Can this module be used in SIL3 systems?
A: Yes, the module is SIL2/3 capable depending on overall system configuration and safety logic.

Q: What type of field devices can this module drive?
A: It can drive relays, solenoids, alarms, and other discrete output devices.

Q: Is there loop-monitoring for fault detection?
A: Yes, loop-monitoring is available on specific variants of the module.

Q: Are LEDs available for diagnostics?
A: Each channel includes LED indicators for fast troubleshooting and status verification.