S7-1200 Expansion Signal Board

1200 Series Expansion Signal Boards

Gongbei 1200 signal boards offer more resource points, a wider variety of options, and more competitive pricing.

• Communication and Digital Signal Boards: Operate identically to the original versions.
• Analog Signal Boards: Require only two lines of code to function.
• Rear DIP Switches: Provide flexible and convenient operation.
• Safety and Stability: Ensures long-term reliable and stable operation.

Model and Order Number	Description	Usage Method
CB 1241 (6ES7 241-1CH30-1XB0)	One channel 485 communication	Same as original
SB 1221 (6ES7 221-3BD30-0XB0)	4 digital inputs, 24VDC (supports source input only)	Same as original
SB 1222 (6ES7 222-1BD30-0XB0)	4 digital outputs (source type, 24VDC)	Same as original
SB 1223 (6ES7 223-0BD30-0XB0)	2 digital inputs, 24VDC (supports sink input only); 2 digital outputs, 24VDC (source type)	Same as original
SB 1231 AE01 (6ES7 231-1AI30-0XB0)	1 analog input (supports voltage or current)	Different from original, requires 2 lines of code
SB 1231 AE02 (6ES7 231-2AI30-0XB0)	2 analog inputs (supports voltage or current)	Different from original, requires 2 lines of code
SB 1231 AE04 (6ES7 231-4AI30-0XB0)	4 analog inputs (supports voltage or current)	Different from original, requires 2 lines of code
SB 1232 AQ01 (6ES7 232-1AQ30-0XB0)	1 analog output (supports voltage and current)	Different from original, requires 2 lines of code
SB 1232 AQ02 (6ES7 232-2AQ30-0XB0)	2 analog outputs (supports voltage and current)	Different from original, requires 2 lines of code
SB 1232 AQ04 (6ES7 232-4AQ30-0XB0)	4 analog outputs (supports voltage or current)	Different from original, requires 2 lines of code
SB 1234 AM03 (6ES7 234-2AI1AQ-0XB0)	2 analog inputs (supports voltage or current), 1 analog output (supports voltage and current)	Different from original, requires 2 lines of code
SB 1234 AM04 (6ES7 234-2AI2AQ-0XB0)	2 analog inputs (supports voltage or current), 2 analog outputs (supports voltage and current)	Different from original, requires 2 lines of code
SB 1234 AM05 (6ES7 234-4AI1AQ-0XB0)	4 analog inputs (supports voltage or current), 1 analog output (supports voltage and current)	Different from original, requires 2 lines of code

Wiring diagram

Digital Input Specification

Specification	Value
Rated Voltage	24V
Isolation	Internal optocoupler isolation

Digital Output Specification

Specification	Value
Rated Voltage	24V
Isolation	Internal optocoupler isolation

Analog Input Specification

Specification	Value
Measurement Range	0-10V or 0-20mA
Full-Scale Range	0-27648
Accuracy	±0.3% of full scale at 25°C / ±0.6% from -20°C to 60°C
Isolation	None

Analog Output Specification

Specification	Value
Resolution	12-bit
Full-Scale Range	0-27648
Accuracy	±0.5% of full scale at 25°C / ±1% from -20°C to 60°C
Load Impedance	Voltage: ≥1000Ω; Current: ≤600Ω
Isolation	None
Maximum Cable Length	100m (shielded twisted pair)