Siemens 6ES7222-1BH32-1XB0 SIMATIC S7-1200 SM 1222 16DO 24V DC PLC I/O Module

The Siemens SIMATIC S7-1200 SM 1222 (6ES7222-1BH32-1XB0) is a digital output module with 16 sinking (NPN transistor) outputs rated 24 V DC at 0.5 A each, drawing 140 mA from the backplane bus and dissipating 2.5 W. Short-circuit protection is not built in and must be provided externally on each output.

Technical Specifications

Certifications & Standards

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

Selection Notes

The current-sinking (NPN) output configuration pairs with sourcing-type field devices, which matters when matching this module to existing wiring - the sourcing-output SM 1222 variant in the same family is the counterpart for sinking-input field devices. Because short-circuit protection is not built in, each output needs external fusing or a protected load if there's a risk of a shorted field wire. The 8 A max. current per module at horizontal mounting, against the lower 50°C vertical-mount ambient limit, sets how many of the 16 outputs can run near full 0.5 A simultaneously.

Applications

Expands SIMATIC S7-1200 CPU digital output count for machines needing more than the CPU's onboard DO - solenoid valves, indicator lamps, small relays - wired to sinking-compatible loads.