Product Overview

• Siemens Digital Output Module

  Part Number: 6ES7222-1BH32-0XB0

  Parameter	Specification
  Product Family	SM 1222 Digital Output Module
  PLC Series	SIMATIC S7-1200
  Number of Outputs	16 Digital Outputs (DO)
  Output Type	Transistor (PNP)
  Output Voltage	24 V DC
  Output Current	0.5 A per channel
  Voltage Range	20.4 – 28.8 V DC
  Mounting	DIN Rail (right side of PLC CPU)
  Protection Class	IP20
  Operating Temperature	-20°C to +60°C
  Dimensions (W×H×D)	45 × 100 × 75 mm
  Weight	~ 0.2 kg

  Product Description:
  6ES7222-1BH32-0XB0 is a SIMATIC S7-1200 SM1222 digital output expansion module that provides 16 transistor outputs (24 V DC). Each output can switch up to 0.5 A, making it suitable for controlling relays, solenoid valves, contactors, and indicator lamps in automation systems.

  Typical Applications

  • Motor starter relay control

  • Solenoid valve control

  • Alarm lamps and buzzers

  • PLC output signals to interlocking systems

  Example PLC Expansion

  Function	Module
  Digital Input	6ES7221-1BH32-0XB0 (16 DI)
  Digital Output	6ES7222-1BH32-0XB0 (16 DO)
  Analog Input	6ES7231-4HD32-0XB0 (4 AI)
  Analog Output	6ES7232-4HB32-0XB0 (2 AO)

Siemens S7-1200 Digital & Analog I/O Module Part Numbers

1. Digital Input Modules (SM 1221)

Module	Description	Part Number
SM 1221	8 Digital Input, 24V DC	6ES7221-1BF32-0XB0
SM 1221	16 Digital Input, 24V DC	6ES7221-1BH32-0XB0
SM 1221	16 Digital Input (AC)	6ES7221-1EF32-0XB0

These modules provide 24VDC sink/source digital inputs for sensors and switches.

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2. Digital Output Modules (SM 1222)

Module	Description	Part Number
SM 1222	8 DO, 24V DC transistor	6ES7222-1BF32-0XB0
SM 1222	16 DO, 24V DC transistor	6ES7222-1BH32-0XB0
SM 1222	8 DO relay	6ES7222-1XF32-0XB0
SM 1222	16 DO relay	6ES7222-1HF32-0XB0

Used for controlling contactors, solenoid valves, relays, etc.

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3. Digital Input / Output Combined Modules (SM 1223)

Module	Description	Part Number
SM 1223	8DI / 8DO (24VDC)	6ES7223-1QH32-0XB0
SM 1223	16DI / 16DO transistor	6ES7223-1BL32-0XB0
SM 1223	16DI / 16DO relay	6ES7223-1PL32-0XB0

These modules provide mixed digital inputs and outputs in one module.

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Analog Modules

4. Analog Input Modules (SM 1231)

Module	Description	Part Number
SM 1231	4 AI (Voltage / Current)	6ES7231-4HD32-0XB0
SM 1231	8 AI (Voltage / Current)	6ES7231-4HF32-0XB0
SM 1231	4 AI High-resolution	6ES7231-5ND32-0XB0
SM 1231	4 AI Thermocouple	6ES7231-5QD32-0XB0
SM 1231	4 AI RTD	6ES7231-5PD32-0XB0

Used for 4-20 mA transmitters, 0-10V sensors, temperature sensors, etc.

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5. Analog Output Modules (SM 1232)

Module	Description	Part Number
SM 1232	2 AO (0-10V / 4-20mA)	6ES7232-4HB32-0XB0
SM 1232	4 AO	6ES7232-4HD32-0XB0

Used for controlling VFD speed reference, valve position, etc.

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6. Analog Input / Output Combined Modules (SM 1234)

Module	Description	Part Number
SM 1234	4AI / 2AO	6ES7234-4HE32-0XB0
SM 1234	2AI / 2AO (Signal board type)	6ES7234-5HD30-0XB0