Siemens SIMATIC S7-1200 Digital & Analog I/O Module 6ES7222-1BH32-0XB0, 8 DI, 8 Relay DO, 2 AI, 2 AO, 24V DC

Industrial automation often demands a compact yet versatile I/O solution that can handle both discrete and analog signals without cluttering the control cabinet. The Siemens 6ES7222-1BH32-0XB0 answers that call, combining 8 digital inputs, 8 relay outputs, 2 analog inputs, and 2 analog outputs in a single SIMATIC S7-1200 module. This integrated design reduces wiring complexity and frees up space, making it ideal for machine builders and system integrators who need reliable mixed-signal processing on a DIN rail.

Who is it for

This module is built for automation engineers, panel builders, and OEMs using SIMATIC S7-1200 CPUs. It suits applications such as packaging machines, conveyor systems, HVAC control, and small-scale process automation where both digital and analog signals must be monitored and controlled from one expansion module.

Main features

• 8 digital inputs, 24V DC sinking/sourcing for flexible sensor connection
• 8 relay outputs with 2A per channel for direct control of actuators, valves, and small motors
• 2 analog inputs supporting 0-10V, 0-20mA, and 4-20mA signals with 10-bit resolution
• 2 analog outputs with the same signal ranges for precise control of drives or proportional valves
• Galvanic isolation between channels and backplane for robust noise immunity
• DIN rail mounting and low power loss of max 2.5W for efficient panel design
• Compatible with SIMATIC S7-1200 CPUs running firmware V2.0 or higher

Specifications

• Brand: Siemens
• Model: 6ES7222-1BH32-0XB0
• MPN: 6ES7222-1BH32-0XB0
• EAN: 6940408100398
• Series: SIMATIC S7-1200
• Module type: Digital/Analog I/O Module
• Digital inputs: 8 (24V DC)
• Digital outputs: 8 (relay, 2A per channel)
• Analog inputs: 2 (0-10V, 0-20mA, 4-20mA, 10-bit)
• Analog outputs: 2 (0-10V, 0-20mA, 4-20mA, 10-bit)
• Supply voltage: 24V DC via backplane bus
• Power loss: max 2.5W
• Isolation: Yes, between channels and backplane
• Mounting: DIN rail
• Operating temperature: 0 to 55 °C
• Compatibility: SIMATIC S7-1200 CPUs (firmware V2.0 or higher)

Tips

When wiring relay outputs, always use external suppression diodes for inductive loads to extend contact life. For analog inputs, select the appropriate signal type in the TIA Portal configuration to match your sensor. Ensure the CPU firmware is updated to V2.0 or later before installing this module to avoid compatibility issues.