Siemens SIPLUS S7-1200 SM 1222 Railway Relay Module Specification
- Drive Type
- PLC Functional Signal Module Extension (Not a motor drive)
- Application
- Safe digital signal isolation and auxiliary switching on rail vehicles
- Weight
- 0.186 Kilograms (kg)
- Connectivity Type
- Screw / Spring-clamp terminal connections
- Automation Grade
- Railway / Heavy Industrial Transit PLC Module Extension
- Sensor Type
- Actuators / Industrial standard AC/DC loads and relays
- Cable Length
- 500 Meter (m)
- Mounting Type
- DIN Rail Mount / Panel Mount layout compatibility
- Features
- 8 Digital Outputs / Relay Contacts / 2 A / Railway EN 50155 Compliance
- Warranty
- Manufacturer standard
- Phase
- Single-Phase / DC (Load output configuration type)
- Speed Range
- Response time delay at signal change: 10 ms (max)
- Control Type
- Digital output relay extension parameter
- Processor Type
- Add-on Railway PLC expansion / Internal microprocessor link
- Usage
- Supplement to onboard I/O of SIPLUS S7-1200 CPUs in rolling stock
- Material
- Conformal coating (SIPLUS Extreme RAIL robust environmental PCB protection)
- Size
- 45 mm x 100 mm x 75 mm (W x H x D module footprint)
- Temperature
- -25 C to +60 C Celsius (oC)
- Height
- 100 Millimeter (mm)
- Product Type
- Digital Output SM 1222 RAIL Expansion Signal Module
- Length
- 75 Millimeter (mm)
Siemens SIPLUS S7-1200 SM 1222 Railway Relay Module Trade Information
- Minimum Order Quantity
- 1 Piece
Siemens SIPLUS S7-1200 SM 1222 Railway Relay Module About
The Siemens SIPLUS S7-1200 SM 1222 (6AG2222-1HF32-1XB0) is a highly specialized digital output expansion module purpose-built for rolling stock, rail vehicles, and wayside transit infrastructure. Derived directly from the standard 6ES7222-1HF32-0XB0 relay card, this heavy-duty variant features a protective conformal coating. This chemical barrier shields delicate internal circuits from harsh environmental hazards like salt spray, heavy dust, moisture, and aggressive condensation.The module introduces 8 digital relay outputs (8 DQ) to a SIMATIC S7-1200 PLC system while maintaining a narrow, space-saving 45mm width profile. Because it uses mechanical, dry-contact relays instead of transistors, it handles both AC and DC switching loops with ease. Each independent channel can pilot a continuous switching current up to 2 A. Compliant with strict railway industry criteria, it functions in temperatures from -25C to +60C and can withstand brief thermal spikes up to +70C for 10 minutes (OT1 with ST1/2 class standards).