EM 223 24 VDC digital quantity expansion module is a digital quantity expansion module produced by Siemens company. This module has 32 inputs and 32 outputs, the input voltage is 24 VDC, the output voltage is 24 VDC or 250 VAC, the maximum output current is 0.75 A or 2 A.
The EM 223 24 VDC digital mixed module is a Siemens SIMATIC expansion module offering 32 digital inputs and either 32 digital outputs or 32 relay outputs. It is used to extend the I/O capacity of S7‑200 PLC systems and includes both sink and source input types.
The manual details the physical dimensions, power consumption, electrical characteristics, isolation ratings, cable length limits, and safety warnings. It also provides wiring diagrams and recommended external suppression circuits for switching inductive loads with the relay‑output version. This manual is written in Chinese.
| Physical dimensions (W×H×D) | 196 mm x 80 mm x 62 mm |
|---|---|
| Weight (BM version) | 500 g |
| Maximum shielded cable length | 500 m |
| Maximum unshielded cable length | 300 m |
| Isolation voltage rating | 500 VAC for 1 minute |
The module can handle up to 55 simultaneous input points in horizontal installation and 45 in vertical installation.
The module provides optical isolation of 500 VAC for up to one minute.
The BM version consumes 9 W, while the PM version consumes 13 W.