Key Features
- Fully compatible with Siemens S7-1200 PLC (firmware V4.0+)
- Matches original modules in interface, mounting, and parameter settings
- Offers various I/O combinations:
- Digital input (DI): 8/16 points, 24VDC, NPN/PNP
- Digital output (DO): 8/16 points, relay or transistor
- Mixed I/O: combinations of DI/DO in 8/16 channel formats
- Analog input (AI): 4 or 8 channels, ±10V, 020mA, 12-bit resolution
- Analog output (AO): 2 or 4 channels, ±10V or 020mA, 14-bit resolution
- Mixed analog I/O: 4 AI + 2 AO
- Adjustable filter time for DI, high relay durability, and clear LED indicators
- Compact design (4570mm width), DIN rail mountable, IP20 protection
Applications
Perfect for industrial automation systems using Siemens PLCs where cost-saving, reliable I/O expansion is required. Widely used in machinery control, HVAC, lighting systems, building management, and retrofitting existing installations.
Technical Specifications
- Digital Input Modules:
- SM1221 8x/16x 24VDC input
- 4mA typical input current, 15V logic high, 5V logic low
- Configurable debounce filter (0.212.8ms)
- Digital Output Modules:
- SM1222 8x/16x relay or 24VDC transistor output
- Relay: 2A per point, 250VAC/30VDC
- Transistor: max 0.5A, 20.428.8VDC
- Mixed DI/DO Modules:
- SM1223 with 8/16 DI and 8/16 DO (relay or transistor)
- Analog Input/Output Modules:
- SM1231 (4/8 AI, ±10V or 020mA)
- SM1232 (2/4 AO, ±10V or 020mA)
- SM1234 (4 AI + 2 AO)
- Resolution: 12-bit AI, up to 14-bit AO
- Accuracy: ±0.10.6% full scale
- Power Supply: 24VDC, reverse polarity protected
- Operating Temperature: -10°C to +60°C
- Dimensions: 4570mm (W) × 100mm (H) × 75mm (D)
- Mounting: DIN rail, plastic housing, IP20
