SIMATIC S7-1200 G2 Signal Boards are extension boards for S7-1200 G2 CPUs, including the SB 1221 (8 DI 100 kHz), SB 1222 (8 DO 100 kHz), SB 1223 (4 DI/4 DO, 24 V 100 kHz or 5 V 200 kHz), SB 1231 (4 AI 14-bit) and SB 1232 (1 AO).
Technical data
| Product | SB / CB / BB |
|---|---|
| Product family | SIMATIC S7-1200 G2 (new generation) |
| Description | Signal boards plugged into the CPU front to add I/O, communication or battery without extra panel space |
| Example version | Accessories SB 1221 signal board SIMATIC S7-1200 G2, SB 1221 digital input module 8 DI 100 kHz; inputs: 8 x DI 24 V DC sink/source, 100 kHz |
| Programming | STEP 7 (TIA Portal) |
Article numbers
| Version | Description | Article No. |
|---|---|---|
| Standard | SB 1221 signal board SIMATIC S7-1200 G2, SB 1221 digital input module 8 DI 100 kHz; inputs: 8 x DI 24 V DC sink/source, 100 kHz | 6ES7221-3BF50-0XB0 |
| Standard | SB 1222 signal board SIMATIC S7-1200 G2, SB 1222 digital output module 8 DO 100 kHz; outputs: 8 x DQ 24 V DC 0.1 A sinking/sourcing transistor, 100 kHz | 6ES7222-5BF50-0XB0 |
| Standard | SB 1223 signal board SIMATIC S7-1200 G2, SB 1223 digital I/O module 4 DI/4 DO 200 kHz; inputs: 4 x DI 5 V DC, 200 kHz; outputs: 4 x DQ 5 V DC 0.1 A, sinking/sourcing transistor, 200 kHz | 6ES7223-7AF50-0XB0 |
| Standard | SIMATIC S7-1200 G2, SB 1223 digital I/O module 4 DI/4 DO 100 kHz; inputs: 4 x DI 24 V DC sink/source, 100 kHz; outputs: 4 x DQ 24 V DC 0.1 A sinking/sourcing transistor, 100 kHz | 6ES7223-7BF50-0XB0 |
| Standard | SB 1231 signal board SIMATIC S7-1200 G2, SB 1231 analog input module 4 AI; inputs: 4 x AI 14 bit ADC (+/-10 V, +/-5 V, +/-2.5 V or 0-20 mA/4-20 mA) | 6ES7231-4HD50-0XB0 |
| Standard | SB 1232 signal board SIMATIC S7-1200 G2, SB 1232 analog output module 1 AO, +/-10 V DC (12-bit resolution) or 0-20 mA (11-bit resolution) | 6ES7232-4HD50-0XB0 |
| Standard | SB 1233 signal board SIMATIC S7-1200 G2, SB 1233 analog I/O module 2 AI/2 AO, inputs: 2 x AI 14 bit ADC (+/-10 V, +/-5 V, +/-2.5 V or 0-20 mA/4-20 mA), outputs: 2 x AQ 14 bit DAC (+/-10 V, 0-20 mA or 4-20 mA) | 6ES7233-4HD50-0XB0 |
| Standard | SIMATIC S7-1200 G2, analog input, SB 1231 TC AI 4xTC 4 AI type J or K thermocouples | 6ES7231-5QD50-0XB0 |
| Standard | SIMATIC S7-1200 G2, analog input, SB 1231 AI 2xRTD AI 2xRTD, Pt100 and Pt1000 | 6ES7231-5PB50-0XB0 |
| Standard | SIMATIC S7-1200 G2, BB 1297 battery board For long-term buffering of the real-time clock, pluggable in the signal board slot of the S7-1200 G2 CPU; battery (CR2032) not included in scope of supply | 6ES7297-4AX50-0XA0 |
| Standard | SIMATIC S7-1200 G2 CB 1241 Communication Board Interface: RS485, with push-in terminal block | 6ES7241-1CA50-0XB0 |
Technical data and article numbers are based on Siemens catalog ST 70 · 2026 (chapter SIMATIC S7-1200 G2) and are for information only. Image is representative.
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Tags: SB / CB / BB, siemens s7-1200 g2, s7-1200, simatic plc, sb / cb / bb, 6ES7221-3BF50-0XB0, 6ES7222-5BF50-0XB0, 6ES7223-7AF50-0XB0, 6ES7223-7BF50-0XB0, 6ES7231-4HD50-0XB0, 6ES7232-4HD50-0XB0, 6ES7233-4HD50-0XB0, 6ES7231-5QD50-0XB0, 6ES7231-5PB50-0XB0, 6ES7297-4AX50-0XA0, 6ES7241-1CA50-0XB0