Siemens 6ES7322-1BH01-0AA0 SM322 16DO 24V DC Module

6ES7322-1BH01-0AA0 SIMATIC S7-300 SM 322 Digital Output Module

Product Introduction

The Siemens 6ES7322-1BH01-0AA0 is a versatile digital output module from the SIMATIC S7-300 family. This SM 322 module features 16 optically isolated outputs, each rated at 24 V DC with a 0.5 A switching capacity. Its compact design, with a width of only 40 mm, allows for high channel density in your control cabinet.

This module stands out with its electronic short-circuit protection, which enhances system reliability. The 6ES7322-1BH01-0AA0 connects via a standard 20-pin front connector. Its robust construction ensures dependable operation across a wide temperature range, making it suitable for various industrial applications.

Technical Specifications

The 6ES7322-1BH01-0AA0 operates with a load voltage L+ rated at 24 V DC. The permissible voltage range spans from 20.4 V to 28.8 V, accommodating typical power supply fluctuations.

Power and Current Details

From the load voltage L+, the module draws a maximum of 80 mA without any load connected. Additionally, it consumes up to 80 mA from the 5 V DC backplane bus. Its typical power loss is 4.9 W, which is efficient for a 16-channel module.

Digital Output Characteristics

This SM 322 provides 16 digital outputs, each capable of driving a load resistance between 48 Ω and 4 kΩ. For a signal "1", the output voltage reaches at least L+ minus 0.8 V. The rated output current is 0.5 A, with a permissible range from 5 mA to 0.6 A across the full temperature range (0 °C to 60 °C). The residual current for a signal "0" remains below 0.5 mA.

Protection and Switching Performance

The module includes electronic short-circuit protection with a typical response threshold of 1 A. This feature prevents damage to the output stages during fault conditions. For inductive loads, the shutdown voltage is limited to L+ minus 53 V.

Output delays are minimal: the "0" to "1" transition takes at most 100 µs, while the "1" to "0" transition completes within 500 µs. Switching frequencies depend on the load type. For resistive loads, the maximum is 100 Hz. With inductive loads, the frequency is limited to 0.5 Hz, while lamp loads allow up to 10 Hz.

Total Current and Derating

The total current per group varies with installation orientation and temperature. For horizontal installation, each group supports up to 4 A at 40 °C, derating to 3 A at 60 °C. For vertical installation, the maximum is 2 A at 40 °C. Notably, the module supports parallel switching of two outputs for redundant load control, but not for uprating.

Cable Length and Isolation

For output wiring, shielded cables can extend up to 1,000 meters, while unshielded cables are limited to 600 meters. The module provides excellent potential separation. Outputs are isolated from each other in groups of 8, and they are also isolated from the backplane bus using optocouplers. The isolation test voltage is 500 V DC.

Diagnostics and Status Indication

This 6ES7322-1BH01-0AA0 does not support diagnostic alarms or functions. There are no indicators for wire-break, short-circuit, fuse blow, or missing load voltage. However, it includes green status LEDs for each digital output channel, clearly showing the active state of each output.

Mechanical and Environmental Data

Physically, the SM 322 measures 40 mm in width, 125 mm in height, and 120 mm in depth. It weighs approximately 190 g. The module operates reliably within an ambient temperature range of 0 °C to 60 °C.

Installation Guidelines

Installing the 6ES7322-1BH01-0AA0 is a simple procedure. Begin by disconnecting the power supply to your S7-300 rack. Mount the module onto the DIN rail by snapping it into place, then secure it with the mounting screws. Connect the 20-pin front connector, ensuring correct wiring for your specific application. Pay close attention to the polarity of the load voltage L+ (24 V DC). Finally, configure the module in your STEP 7 hardware configuration and download the updated project to the CPU.

Packaging List

• Siemens 6ES7322-1BH01-0AA0 SM 322 digital output module (1 unit)

• Labeling strips (1 set)

• Manual (1 copy)

Shipping Method: FedEx, UPS, DHL

Frequently Asked Questions (FAQ)

1. Does the 6ES7322-1BH01-0AA0 include short-circuit protection?
Yes, this SM 322 module features electronic short-circuit protection with a typical response threshold of 1 A.

2. What is the total current capacity per group for this Siemens output module?
For horizontal installation, each group handles up to 4 A at 40 °C and 3 A at 60 °C. For vertical installation, it is 2 A at 40 °C.

3. Can I use this module to control a digital input directly?
Yes, the outputs on the 6ES7322-1BH01-0AA0 are designed to control digital inputs as well as other loads.

4. What is the maximum switching frequency for inductive loads?
The maximum switching frequency for inductive loads is 0.5 Hz. For resistive loads, it is 100 Hz.

5. Is the 20-pin front connector included with the module?
No, the front connector is not included. You need to purchase it separately for this SM 322 module.