Product Overview
The 6ES7223-1BL22-0XA0 is a Siemens SIMATIC S7-200 EM 223 digital input/output expansion module, delivering 16 channels of 24 V DC digital input (sink/source configurable) plus 16 channels of 24 V DC transistor output at 0.75 A per point, intended exclusively for S7-22X CPUs (CPU 221, 222, 224, 224XP, 226, 226XM) within the S7-200 small-PLC platform. The “EM 223” designation places this module in the S7-200 expansion ecosystem, where it serves as the mixed-signal I/O workhorse—unlike the EM 221 (input-only) and EM 222 (output-only) siblings, the 6ES7223-1BL22-0XA0 consolidates 32 points of mixed digital I/O in a single 137.5 mm-wide housing, making it the highest-density 24 V DC mixed module in the classic S7-200 catalog and the default pick for OEM machines that need both sensing and actuation without doubling module count.Architecturally, the 6ES7223-1BL22-0XA0 draws 5 V DC (max. 160 mA) from the S7-22X CPU’s expansion bus and derives its 24 V DC field-side power from the external L+ supply (20.4–28.8 V DC range, rated 24 V). The 16 DI channels accept 15–30 V DC for logic “1” (typ. 4 mA sink) and 0–5 V for logic “0”, with 4.5 ms max input delay on standard inputs; sink/source wiring flexibility means the same 6ES7223-1BL22-0XA0 can land PNP or NPN field sensors without hardware change. The 16 DO channels are source-type (PNP) transistor outputs, 0.75 A per point, grouped 4/4/8 with optocoupler isolation (500 V AC tested) between groups; total group current is capped at 3 A per conductor/group. No integral short-circuit protection—external fusing or per-point protection is required, consistent with S7-200 design philosophy. Note: the 6ES7223-1BL22-0XA0 was discontinued by Siemens effective October 1, 2017 (product lifecycle “Prod.Discont.”), and is now supplied exclusively as a spare-part SKU for the large installed base of S7-200 machines still running in OEM packaging, conveying, textile, food-mini-line, and building-automation contexts where a full migration to S7-1200 has not yet been justified.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 6ES7223-1BL22-0XA0 |
| Manufacturer | Siemens (SIMATIC S7-200) |
| Product Type | Digital I/O Expansion Module (EM 223) |
| Compatible CPU | S7-22X only (CPU 221/222/224/224XP/226/226XM) |
| Digital Input Channels | 16 × 24 V DC, sink/source |
| Digital Output Channels | 16 × 24 V DC, source (PNP), transistor |
| Rated Load Voltage (L+) | 24 V DC (20.4 – 28.8 V range) |
| Input Current (signal “1”) | Typ. 4 mA |
| Input Delay (0→1, standard) | Max. 4.5 ms |
| Output Current per Point | 0.75 A (rated) |
| Total Group Current | 3 A per group (grouping 4 / 4 / 8) |
| Short-Circuit Protection | No (external provision required) |
| Inductive Shutdown Limiting | L+ (–48 V) |
| Output Voltage (signal “0”) | Max. 0.1 V |
| Output Voltage (signal “1”) | Min. 20 V |
| Backplane Current (5 V DC) | Max. 160 mA from S7-22X CPU bus |
| Power Loss (typ.) | 6 W |
| Isolation | Optocoupler, 500 V AC tested (DI groups of 4, DO groups of 4/4/8) |
| Shielded Cable Length (max.) | 500 m |
| Unshielded Cable Length (max.) | 150 m |
| 2-Wire Sensor Support | Yes, max. 1 mA quiescent |
| Connection Method | Plug-in I/O terminals |
| Mounting | 35 mm DIN rail / panel mount |
| Dimensions (W × H × D) | 137.5 × 80 × 62 mm |
| Weight | ≈ 0.36 kg |
| Operating Temp. | 0 °C to +55 °C (S7-200 CPU ambient) |
| Lifecycle Status | Discontinued (Oct 1, 2017), spare-part supply |
| Certifications | CE, cULus, RoHS (since Mar 31, 2008) |
