Product Overview

• Siemens Digital Output Module

  Part Number: 6ES7222-1HH32-0XB0

  Parameter	Specification
  Product Family	SM 1222 Digital Output Module
  PLC Series	SIMATIC S7-1200
  Output Channels	16 Digital Outputs (DO)
  Output Type	Relay Output
  Output Current	2 A per channel
  Output Voltage	5–30 V DC / 5–250 V AC
  Supply Voltage	24 V DC
  Switching Delay	≤ 10 ms
  Dimensions (W × H × D)	45 × 100 × 75 mm
  Weight	~ 0.24 kg
  Protection	IP20

  Product Description:
  6ES7222-1HH32-0XB0 is a SIMATIC S7-1200 SM1222 relay digital output expansion module with 16 relay outputs, each capable of switching up to 2 A. It allows the PLC to control AC or DC loads, including contactors, solenoid valves, pumps, alarms, and indicator lamps.

  Key Features

  • 16 relay outputs (2 A each)

  • Supports AC loads up to 250 V and DC loads up to 30 V

  • Electrical isolation via relay contacts

  • LED status indicator for each output

  • Designed for DIN-rail mounting with S7-1200 PLC

  Typical Applications

  • Pump starter control

  • Motor contactor switching

  • Solenoid valve control

  • Alarm lamps and buzzers

  • Industrial automation panels

  Comparison of S7-1200 Output Modules

  Part Number	Type	Outputs	Current
  6ES7222-1BF32-0XB0	Transistor	8 DO	0.5 A
  6ES7222-1BH32-0XB0	Transistor	16 DO	0.5 A
  6ES7222-1HH32-0XB0	Relay	16 DO	2 A

• 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