Product Overview
The Siemens SIMATIC S7-1200 module 6ES7222-1BH32-0XB0 extends an S7-1200 basic controller with 16 digital outputs for controlling 24 V DC actuators. As an SM 1222 DQ16×24 V DC/0.5 A output module, it uses solid-state transistor outputs (sourcing MOSFET type) capable of switching up to 0.5 A per channel, suitable for solenoid valves, indicator lamps, contactor coils and other DC loads. The module connects to the CPU via the S7-1200 backplane bus, and engineers configure it in TIA Portal like any other S7-1200 signal module.
Electrical Performance and Output Specifications
In addition, the supply for the output electronics is 24 V DC with a permissible range from 20.4 to 28.8 V DC. The module draws up to about 140 mA from the 5 V backplane bus and has a power loss of around 2.5–5 W depending on load. Outputs guarantee a “1” signal at 20 V DC or higher and a “0” signal at 0.1 V DC or lower (with 10 kΩ load), ensuring reliable switching in industrial environments.
Furthermore, the maximum output current per channel is 0.5 A for resistive and inductive loads and up to 5 W for lamp loads. The module supports a total group current of up to 8 A when mounted horizontally up to 50 °C.
Diagnostics and Switching Performance
Each of the 16 outputs has a status LED on the front panel for quick diagnostics. The module also supports diagnostic alarms that engineers can evaluate in the CPU program. Turn-on delay is typically ≤ 50 µs and turn-off delay ≤ 200 µs with resistive loads, enabling fast switching for many automation tasks.
Moreover, the outputs are grouped into one electrical group. The module provides isolation between the outputs and the backplane bus at 500 VAC, while there is no channel-to-channel isolation within the group. The module meets IP20 protection for installation inside an enclosure.
Mechanical Design and Operating Conditions
From a mechanical perspective, the SM 1222 DQ16×24 V DC module has dimensions of 45 × 100 × 75 mm (W × H × D) and a weight of about 0.22 kg, matching the compact S7-1200 form factor.
The module operates from −20 to +60 °C when mounted horizontally and from −20 to +50 °C when mounted vertically. It supports up to 95% relative humidity at 25 °C, while the storage temperature ranges from −40 to +70 °C.
Typical Industrial Applications
As a result, the Siemens SIMATIC S7-1200 SM 1222 digital output module provides additional digital outputs for valves, relays, signal towers and other actuators. Typical applications include small machines, building automation panels and general industrial control systems based on SIMATIC S7-1200.
Specifications Table
| Category | Specification |
|---|---|
| Product family | SIMATIC S7-1200 SM 1222 digital output module |
| Article number | 6ES7222-1BH32-0XB0 |
| Module type | Digital output, SM 1222 DQ 16×24 V DC/0.5 A |
| Number of digital outputs | 16 channels |
| Output type | Solid-state transistor, MOSFET (sourcing) |
| Rated output voltage | 24 V DC |
| Permissible supply range | 20.4–28.8 V DC |
| Rated output current | 0.5 A per channel (resistive/inductive loads) |
| Max lamp load | 5 W per channel |
| Total current per group | Up to 8 A (horizontal mounting, ≤ 50 °C) |
| Signal “1” level | ≥ 20 V DC |
| Signal “0” level | ≤ 0.1 V DC (at 10 kΩ load) |
| Turn-on delay (0→1) | ≤ 50 µs |
| Turn-off delay (1→0) | ≤ 200 µs |
| Backplane current | Up to 140 mA at 5 V |
| Power loss | Approx. 2.5–5 W |
| Diagnostics | Output status LEDs and diagnostic alarms |
| Isolation | Between outputs and backplane bus: 500 VAC; within group: no channel-to-channel isolation |
| Protection class | IP20 |
| Dimensions (W × H × D) | 45 × 100 × 75 mm |
| Weight | ≈ 0.22–0.26 kg |
| Operating temperature | −20 to +60 °C (horizontal), −20 to +50 °C (vertical) |
