Description
The Siemens SIMATIC S7-300 SM 322 digital output module (6ES7322-1BP50-0AA0) expands the I/O capacity of SIMATIC S7-300 PLCs and ET 200M distributed I/O stations. Engineered for applications requiring a high channel count in a compact footprint, this module integrates 64 sourcing digital outputs into a single module slot. It converts internal PLC CPU logic signals into 24V DC electrical outputs to drive actuators, solenoids, indicators, and small relays across automated industrial machinery.
Main Features
- High Output Density: Offers 64 digital outputs in a single S7-300 module width, significantly saving DIN-rail and cabinet space.
- Transistor Switching: Utilizes 24V DC transistor outputs with sourcing (PNP) operation for fast response times and wear-free operation.
- Optocoupler Galvanic Isolation: Optically isolated from the internal backplane bus to shield the central CPU from field electrical noise and voltage spikes.
- Diagnostics & Status LEDs: Integrated status LEDs provide quick channel and operational diagnostic checks for easy troubleshooting.
Benefits
- Panel Space Optimization: High-channel density reduces the total number of modules and rack space required inside control cabinets.
- Long Operational Lifetime: Solid-state transistor outputs eliminate mechanical wear, ensuring high switching frequencies and low maintenance costs.
- Enhanced System Protection: Galvanic isolation between field signals and internal bus logic safeguards the controller against electrical faults.
- Seamless Integration: Fully compatible with STEP 7 or TIA Portal software environments for effortless configuration and diagnostics.
Applications
Widely deployed in automated manufacturing, packaging machinery, conveyor control, process automation, material handling, and assembly lines requiring high-density digital signal switching.
Key Features
- 64 digital outputs operating at 24V DC (sourcing).
- Maximum output current of 0.1A per channel.
- Optocoupler optical isolation between backplane bus and field circuits.
- Solid-state transistor outputs for wear-free, rapid switching.
- Designed for SIMATIC S7-300 PLC system and ET 200M expansion racks.
- Sinking/sourcing group topology for organized field wiring.
- Status indicator LEDs for clear channel diagnostics.
- Compatible with standard 40-pin front connectors (top/bottom connector block configuration).
Technical Specification Table
| Specification | Details |
| Brand | Siemens |
| Model | 6ES7322-1BP50-0AA0 |
| Product Type | PLC Digital Output Module (SM 322) |
| Rated Voltage | 24V DC |
| Rated Current | 0.1A per output channel |
| Power/Capacity | Power loss approx. 6.0 W |
| Frequency | Not specified by manufacturer |
| IP Rating | IP20 |
| Dimensions | 40 mm × 125 mm × 120 mm |
| Weight | Approx. 300 g |
| Standards/Certification | CE, UL, CSA, cULus, FM Class 1 Div 2 |
| Warranty | Standard Manufacturer Warranty |
Frequently Asked Questions (FAQ)
Q1: What is the output density of the Siemens 6ES7322-1BP50-0AA0 module?
A: This module features 64 digital outputs in a single S7-300 width module slot.
Q2: What is the voltage and current rating per output channel?
A: Each output channel is rated for 24V DC with a maximum current capacity of 0.1A.
Q3: Does this output module use relays or transistors?
A: It uses solid-state transistor outputs, which provide fast, wear-free switching.
Q4: Is this module isolated from the PLC backplane bus?
A: Yes, it features optocoupler isolation to protect the PLC CPU and backplane bus from field electrical noise and voltage surges.
Q5: Which PLC systems are compatible with this output module?
A: It is compatible with Siemens SIMATIC S7-300 PLCs and ET 200M distributed I/O stations.
Q6: What software is required to configure this module?
A: It can be configured using Siemens STEP 7 (SIMATIC Manager) or TIA Portal.

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