Description
The Siemens SIMATIC S7-1200 SM 1222 (6ES7222-1BH32-0XB0) is a high-density 16-channel digital output signal module designed for SIMATIC S7-1200 PLCs. It provides a reliable bridge between the central processor unit and external field devices, converting internal controller logic signals into solid-state electrical switching actions.
Operating on a 24 V DC supply, this module uses transistor outputs rated at 0.5 A per channel. Solid-state transistor outputs provide high switching frequencies and infinite switching cycle lifespans compared to mechanical relays. In Bangladesh’s fast-moving industrial sectors—such as textiles, pharmaceuticals, food processing, and plastics—the 6ES7222-1BH32-0XB0 provides seamless automation expansion without replacing existing PLC CPUs.
Key Features
- 16 Transistor Digital Outputs: Expands control system capacity with 16 independent 24 V DC transistor output channels.
- 0.5 A Current Rating Per Channel: Drives standard industrial solenoids, small contactors, interface relays, and status lamps efficiently.
- High Switching Frequency: Transistor outputs support rapid switching applications without physical contact wear or mechanical lag.
- Compact DIN-Rail Form Factor: Designed for direct clip-on installation to the right side of S7-1200 CPU modules.
- Clear Visual Diagnostics: Front-panel green status LEDs display real-time logic states for every individual output channel.
Technical Advantages
- High Efficiency: Low power consumption (approx. 1.5 W power loss) reduces heat load within control panel cabinets.
- Durable Construction: Solid-state switching construction ensures long operational life and maintenance-free execution in high-cycle processes.
- Safety Protection: Optical isolation between backplane bus and field outputs shields CPU electronics from field transient surges.
- Energy Saving: Optimized electronic design reduces energy overhead during continuous 24/7 operation.
- Easy Maintenance: Removable terminal block connectors allow fast panel maintenance and zero-stress troubleshooting.
Applications
- Industrial Manufacturing: High-speed packaging lines, automated sorting machines, and plastic injection molding.
- Factory Operations: Spinning, weaving, dyeing, and printing machinery in Bangladesh’s textile sector.
- Commercial Systems: Pumping station automation, HVAC multi-stage compressor switching, and elevator logic controls.
- Office & Utility Control: Centralized lighting automation and motorized valve control panels.
- Project Installation: Custom PLC control panel assembly and system retrofits across Dhaka, Chattogram, Gazipur, and Narayanganj.
Why Choose This Product?
- Genuine Siemens Reliability: Built to global industrial standards for zero-downtime control operations.
- Cost-Effective System Scaling: Expands output channel count economically without upgrading to a larger CPU controller.
- Long Operational Lifetime: Transistor-based switching eliminates contact erosion, lowering long-term maintenance costs.
- Trusted Local Supply: Procured reliably with nationwide shipping and technical support from loopshop.com.bd in Bangladesh.
Technical Specification Table
| Specification | Details |
| Model | 6ES7222-1BH32-0XB0 (SM 1222 DC 16 DO) |
| Brand | Siemens |
| Rated Power | Power Loss: Approx. 1.5 W |
| Voltage | 24 V DC (Permissible range: 20.4 V to 28.8 V DC) |
| Current | 0.5 A per channel (Current consumption from bus: 120 mA) |
| Frequency | Not Applicable (DC Transistor Switching) |
| Efficiency | High Efficiency |
| Protection | IP20 Enclosure Rating |
| Dimension | 45 mm x 100 mm x 75 mm (W x H x D) |
| Weight | Approx. 0.220 kg (220 g) |
| Operating Temperature | -20 °C to +60 °C (Horizontal installation) |
| Warranty | Standard Manufacturer Warranty |
Features List
✓ 16 digital transistor output channels (24 V DC / 0.5 A)
✓ Fast solid-state switching for high-cycle automation tasks
✓ Galvanic optical isolation protecting main CPU electronics
✓ Compact 45 mm module width for rail space optimization
✓ Removable front terminal blocks for simple wiring and maintenance
Benefits For Customers
- Eliminates Mechanical Contact Wear: Transistor switching extends hardware life indefinitely for high-frequency operations.
- Saves Control Cabinet Space: 16 channels packed into a 45 mm frame maximizes I/O density.
- Reduces System Downtime: LED diagnostic indicators accelerate fault isolation on the factory floor.
- Resilient in Hot Conditions: Operating tolerance up to +60 °C handles warm industrial panel environments in Bangladesh.
Installation & Maintenance Guide
Installation Requirements:
- Power down the S7-1200 PLC system before connecting the SM 1222 expansion module.
- Slide the module onto the standard 35 mm DIN rail adjacent to the CPU and engage the bus connector clip firmly.
- Wire the 24 V DC field supply to the module power terminals observing correct polarity.
- Use properly rated copper wiring for field output connections.
Maintenance Tips:
- Routinely clean enclosure dust filters to maintain unhindered convection cooling around the module vents.
- Verify screw terminal torque on removable wiring connectors during quarterly preventive maintenance.
- Check LED indicator status periodically to monitor active channel logic states.
Safety Instructions:
- Panel wiring and installation must be performed by qualified electrical/automation technicians.
- Do not exceed the maximum rated current of 0.5 A per channel to prevent electronic thermal overload.
- Ensure the PLC mounting rail is earth-grounded to safeguard equipment against electrostatic discharge (ESD).
Frequently Asked Questions (FAQ)
Q: What is the price of Siemens 6ES7222-1BH32-0XB0 in Bangladesh?
A: The price of the Siemens S7-1200 SM 1222 digital output module in Bangladesh varies based on stock availability and import duties. Please check loopshop.com.bd or contact our sales team for current pricing.
Q: Where can I buy Siemens 6ES7222-1BH32-0XB0 in Bangladesh?
A: You can purchase genuine Siemens 6ES7222-1BH32-0XB0 I/O modules directly online from loopshop.com.bd with delivery across Bangladesh.
Q: What warranty does this product have?
A: Warranty coverage depends on supplier stock terms. Please review product details on loopshop.com.bd or speak with customer support for specific terms.
Q: Is this suitable for Bangladesh climate?
A: Yes, with an operating temperature rating up to +60 °C, this module performs reliably in hot, humid tropical panel environments throughout Bangladesh.
Q: How to install this product?
A: Turn off PLC power, mount the SM 1222 module onto the DIN rail next to the S7-1200 CPU, snap the bus connector into place, wire your 24V DC outputs, and configure the module in TIA Portal.
Q: What type of outputs does the 6ES7222-1BH32-0XB0 module have?
A: This module features solid-state transistor (sinking/sourcing DC) digital outputs, ideal for fast and wear-free switching.
Q: Can I use this module with AC loads directly?
A: No, transistor outputs are rated for 24 V DC loads only. For AC switching, use interposing relays or a relay output module (SM 1222 Relay).
Q: What is the maximum current capacity per output channel?
A: Each individual output channel supports up to 0.5 A at 24 V DC.
Q: Is this module compatible with all Siemens S7-1200 CPUs?
A: Yes, it is fully compatible with all S7-1200 CPU models (e.g., CPU 1211C, 1212C, 1214C, 1215C, 1217C).
Q: Which software is used to configure this digital output module?
A: It is configured using Siemens SIMATIC STEP 7 (TIA Portal) engineering software.

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