Siemens 6ES7222-1BF22-0XA0 SIMATIC S7-200 EM 222 8DO 24V DC Output Module

Overview

SIEMENS SIMATIC S7-200

6ES7222-1BF22-0XA0 SIMATIC S7-200 EM 222 8DO 24V DC Output Module

An EM 222 expansion module with eight sourcing MOSFET outputs, 0.75 A per point, four-channel isolation groups and removable I/O terminal connections.

At a Glance

Brand	Siemens
Model	6ES7222-1BF22-0XA0
Product Type	Digital output expansion module
Core Function	Adding eight transistor output channels
Application	Compatible S7-22X CPUs

Electronic switching

The outputs are sourcing MOSFET channels rather than relay contacts.

Two groups of four

The wiring groups divide the eight outputs into four-channel groups.

External fault protection

The outputs do not include short-circuit protection.

Product Overview

6ES7222-1BF22-0XA0 adds eight 24 V DC digital outputs to compatible SIMATIC S7-22X CPUs, using solid-state sourcing MOSFET switching.

Each output is rated at 0.75 A, with the group current kept within 3 A and optocoupler isolation between the field circuits and logic.

Ordering focus: Retain the 24 V DC transistor-output variant, calculate both point and group current, and provide the required protection for the load wiring.

Key Functions

Switch eight DC loads electronically

The eight MOSFET outputs source current to the connected loads without using mechanical relay contacts.

Group and isolate the load connections

The outputs are arranged in groups of four and use optical field-to-logic isolation tested at 500 V AC.

Support removable I/O wiring

Plug-in terminal connections allow the field-wiring assembly to be handled separately from the expansion module.

Official Specifications

Rated Load Voltage and Range	24 V DC; permissible range 20.4–28.8 V DC
Output Technology	8 sourcing MOSFET outputs
Rated Output Current	0.75 A per point
Maximum Current Per Group	3 A; horizontal installation up to 55 °C or all positions up to 40 °C
Minimum Signal-1 Voltage	20 V DC
Maximum Signal-0 Leakage Current	10 µA
Maximum Output Delays	50 µs off-to-on; 200 µs on-to-off
Inductive Clamp Voltage	L+ minus 48 V
Maximum Lamp Load	5 W
Integrated Short-Circuit Protection	Not provided
Backplane-Bus Current	Maximum 50 mA from 5 V DC
Typical Power Loss	2 W
Isolation Arrangement	Optocoupler field-to-logic isolation; groups of 4 outputs
Insulation Test	500 V AC for 1 minute
Maximum Cable Length	500 m shielded; 150 m unshielded
Field-Wiring Terminals	Plug-in I/O terminals
Dimensions and Approximate Weight	45 × 80 × 62 mm; 150 g

Official source:Siemens EM 222 Data Sheet · Siemens S7-200 System Manual

Frequently Asked Questions

Does 6ES7222-1BF22-0XA0 use relay contacts for the eight outputs?

The outputs are solid-state sourcing MOSFET channels rather than relay contacts.

Can I rely on 6ES7222-1BF22-0XA0 to clear a short circuit in the field wiring?

The module does not provide integrated short-circuit protection for its outputs.

How should I divide loads when using all outputs on 6ES7222-1BF22-0XA0?

Keep each point within 0.75 A and each four-output group within the specified 3 A limit.

Will 6ES7222-1BF22-0XA0 connect to any SIMATIC CPU family?

This expansion module is intended for compatible S7-22X CPUs.

What leakage should I allow for an output that is off on 6ES7222-1BF22-0XA0?

The maximum signal-0 residual current is 10 µA.

How long can the output cable be when I use 6ES7222-1BF22-0XA0?

The maximum cable length is 500 m with shielding or 150 m without shielding.

Can I remove the field terminal assembly from 6ES7222-1BF22-0XA0 for service?

The module uses plug-in I/O terminals for the field wiring.

Compatibility & Ordering Notes

Before ordering 6ES7222-1BF22-0XA0: Use the EM 222 DC-output article with a compatible S7-22X CPU and the correct transistor load wiring, current budget and external fault protection.

Compatibility Checklist for 6ES7222-1BF22-0XA0

• Use a compatible S7-22X CPU and account for the module’s 50 mA maximum backplane demand.
• Match the load supply to 20.4–28.8 V DC.
• Limit each output to 0.75 A and each group to 3 A under its mounting-temperature condition.
• Provide short-circuit protection for the output circuit because it is not integrated in the module.
• Distinguish the transistor-output article from the relay and AC-output variants.
• Keep field cables within the specified shielded or unshielded length limit.

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