Siemens 6ES7223-1PL32-0XB0 SIMATIC S7-1200 SM 1223 16DI/16DO Relay 2A Digital I/O Module

The Siemens 6ES7223-1PL32-0XB0 is a SIMATIC S7-1200 SM 1223 digital I/O module with 16 digital inputs, 24 V DC sink/source, and 16 relay outputs rated 2 A each. It mounts on the S7-1200 backplane bus, doubling the point count of the 8-channel SM 1223 variant in the same product family. The relay outputs switch AC loads up to 250 V or DC loads up to 30 V.

Technical Specifications

Certifications & Standards

• CE
• CSA
• UL
• cULus
• FM
• RCM
• KC
• Marine approval

Selection Notes

This 16DI/16DO relay variant doubles the channel count of the 8-channel SM 1223 in the same family while keeping the module width to 70 mm, reducing backplane space per I/O point versus running two 8-channel modules. Full 16-output operation is thermally limited: all 16 relay outputs can be active simultaneously up to 55 degrees C horizontal or 45 degrees C vertical mounting, dropping to 8 simultaneously active, non-adjacent, outputs at the 60 degrees C horizontal / 50 degrees C vertical maximum. Choose a transistor-output DQ variant instead when switching speed exceeds the relay's 100,000-cycle rated-load life.

Applications

Typical uses include expanding S7-1200 digital I/O on machine control panels with higher point counts, driving 24 V DC or up to 250 V AC field devices such as indicator lamps, small motor starters, and solenoid valves directly from the relay outputs, and reading 24 V DC sensor and pushbutton inputs in groups of two.