Siemens SIPLUS S7-1200 signal & communication boards (SB, CB 1241)

SIPLUS extreme signal boards and RS485 communication board for S7-1200 CPUs in harsh environments.

Key features

Plug into the S7-1200 CPU front slot
Extended temperature range and exposure to environmental substances
Digital, analog output, RTD and RS485 versions
Cannot be used with -2XB0 SIPLUS CPU versions (as printed)

Specifications

Brand	Siemens
Product line	SIPLUS
Series	SIPLUS S7-1200
Form factor	Signal/communication board
Based on	SIMATIC SB/CB standard boards
Mounting	S7-1200 CPU front slot
Accessories	As SIMATIC standard boards
Source	Siemens Catalog ST 70 · 2026, p. 123-272

6AG1221-3AD30-5XB0		Board: SB 1221 \| I/O: 4 DI 5 V DC 200 kHz \| Version: Extended temperature
6AG1221-3BD30-5XB0		Board: SB 1221 \| I/O: 4 DI 24 V DC 200 kHz \| Version: Extended temperature
6AG1222-1AD30-5XB0		Board: SB 1222 \| I/O: 4 DQ 5 V DC 0.1 A 200 kHz \| Version: Extended temperature
6AG1222-1BD30-5XB0		Board: SB 1222 \| I/O: 4 DQ 24 V DC 0.1 A 200 kHz \| Version: Extended temperature
6AG1223-0BD30-4XB0		Board: SB 1223 \| I/O: 2 DI / 2 DQ 24 V DC 0.5 A \| Version: Conformal coating
6AG1223-0BD30-5XB0		Board: SB 1223 \| I/O: 2 DI / 2 DQ 24 V DC 0.5 A \| Version: -25 ... +55 °C
6AG1223-3AD30-5XB0		Board: SB 1223 \| I/O: 2 DI / 2 DQ 5 V DC 200 kHz \| Version: Extended temperature
6AG1223-3BD30-5XB0		Board: SB 1223 \| I/O: 2 DI / 2 DQ 24 V DC 200 kHz \| Version: Extended temperature
6AG1232-4HA30-5XB0		Board: SB 1232 \| I/O: 1 AO ±10 V / 0-20 mA \| Version: -25 ... +55 °C
6AG1232-4HA30-4XB0		Board: SB 1232 \| I/O: 1 AO ±10 V / 0-20 mA \| Version: 0 ... +55 °C
6AG1231-5PA30-5XB0		Board: SB 1231 RTD \| I/O: 1 AI RTD Pt100-Pt1000 \| Version: Extended temperature
6AG1241-1CH30-5XB1		Board: CB 1241 \| I/O: 1x RS485 point-to-point \| Version: Extended temperature

PLC I/O ModulesSiemens

12 product codes available in this family

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Siemens SIPLUS S7-1200 signal & communication boards (SB, CB 1241)

Brand Siemens·PLC I/O Modules

Available part numbers (12)

6AG1221-3AD30-5XB0, 6AG1221-3BD30-5XB0, 6AG1222-1AD30-5XB0, 6AG1222-1BD30-5XB0, 6AG1223-0BD30-4XB0, 6AG1223-0BD30-5XB0, 6AG1223-3AD30-5XB0, 6AG1223-3BD30-5XB0, 6AG1232-4HA30-5XB0, 6AG1232-4HA30-4XB0 + 2 more — see full table ↓

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Siemens SIPLUS S7-1200 signal & communication boards (SB, CB 1241)