Siemens 6ES7223-1BL32-0XB0 SIMATIC S7-1200 Digital I/O Module 16 DI/16 DO 24V DC

The Siemens 6ES7223-1BL32-0XB0 is a SIMATIC S7-1200 Signal Module (SM 1223) combining 16 digital inputs and 16 digital outputs in a single unit. The 16 inputs operate at 24 V DC (Sink/Source) and the 16 transistor outputs switch up to 0.5 A at 24 V DC, making it suitable for compact PLC-based machine control.

Technical specifications:

• MLFB: 6ES7223-1BL32-0XB0
• Manufacturer: Siemens
• Product line: SIMATIC S7-1200
• Product type: SM 1223, DI 16x24 V DC, DQ 16x24 V DC
• Digital inputs: 16, grouped in pairs, 24 V DC, IEC 61131 type 1
• Input voltage signal "1": min. 15 V DC at 2.5 mA
• Input voltage signal "0": max. 5 V DC at 1 mA
• Input delay: parameterizable 0.2 ms to 12.8 ms (groups of four)
• Digital outputs: 16, transistor, individual channels
• Output current: 0.5 A per channel at 24 V DC
• Output delay "0" to "1": max. 50 µs; "1" to "0": max. 200 µs
• Supply voltage: 24 V DC (20.4 - 28.8 V)
• Backplane bus current draw (5 V DC): max. 185 mA
• Power loss: typ. 4.5 W
• Cable length (shielded): inputs max. 500 m; outputs max. 500 m
• IP rating: IP20
• Operating temperature: -20 °C to 60 °C (horizontal); -20 °C to 50 °C (vertical)
• Dimensions (WxHxD): 70 x 100 x 75 mm
• Weight: approx. 310 g
• Certifications: CE, UL, cULus, CSA, FM, RCM, KC, Marine

Features and benefits:

• Combined 16 DI / 16 DO in one module reduces wiring complexity and cabinet space.
• Parameterizable input filter delays (0.2 ms to 12.8 ms) allow noise filtering per application.
• Diagnostic alarm and LED status indicators for both inputs and outputs support fast fault-finding.
• Channel-to-backplane bus isolation at 500 V AC protects the CPU backplane from field-side faults.
• Sink/Source input compatibility accepts both PNP and NPN field devices.

Applications:

• Expanding I/O on SIMATIC S7-1200 CPUs for machine automation and process control.
• Controlling 24 V DC actuators, solenoids, and indicator lamps from a single module.
• Reading digital sensors, proximity switches, and push-buttons in panel-mounted control systems.
• Industrial installations requiring wide operating temperature range (-20 °C to 60 °C) and marine-certified equipment.

Compliant with IEC 61131 (input characteristic type 1). Part of the Siemens SIMATIC S7-1200 range.

Also known as: Siemens 6ES7223-1BL32-0XB0, SIMATIC S7-1200 SM 1223 digital I/O module, S7-1200 16DI 16DO expansion module.