Product Overview

The Siemens 6ES7322-1BH01-0AA0 is a digital output module. It belongs to the SM 322 family of SIMATIC S7-300 modules. This device provides 16 isolated digital outputs at 24V DC with 0.5A per channel.

The module includes electronic short-circuit protection. Furthermore, it limits inductive shutdown voltage to L+ (-53V). Therefore, it reliably drives solenoids, relays, contactors, and indicators.

General Specifications

The 6ES7322-1BH01-0AA0 offers robust output capabilities for S7-300 systems.

• Manufacturer: Siemens.

• Series: SIMATIC S7-300.

• Part Number: 6ES7322-1BH01-0AA0.

• Module Type: Digital Output SM 322.

• Number of Digital Outputs: 16.

• Required Front Connector: 20-pin.

• Width: 40 mm.

• Height: 125 mm.

• Depth: 120 mm.

• Weight: approx. 190 g.

Supply Voltage and Current

The 6ES7322-1BH01-0AA0 has defined power requirements.

• Load Voltage L+ (Rated): 24 V DC.

• Load Voltage L+ (Permissible Range): 20.4 to 28.8 V DC.

• Input Current (from load voltage L+, no load): max. 80 mA.

• Input Current (from backplane bus 5V DC): max. 80 mA.

• Power Loss: typ. 4.9 W.

Output Specifications

The 6ES7322-1BH01-0AA0 provides high-performance digital outputs.

• Number of Outputs: 16.

• Short-Circuit Protection: Yes (electronic, typ. 1A response threshold).

• Inductive Shutdown Voltage Limitation: L+ (-53V).

• Output Voltage for Signal "1": min. L+ (-0.8V).

Output Current:

• Rated Value: 0.5 A.

• Permissible Range (0-40°C): 5 mA to 0.6 A.

• Permissible Range (40-60°C): 5 mA to 0.6 A.

• Minimum Load Current: 5 mA.

• Residual Current for Signal "0": max. 0.5 mA.

Load Resistance Range:

• Lower Limit: 48 Ω.

• Upper Limit: 4 kΩ.

Switching Capacity:

• Lamp Load: max. 5 W.

Output Delay Times

The 6ES7322-1BH01-0AA0 provides fast switching for resistive loads.

• Output Delay ("0" to "1"): max. 100 µs.

• Output Delay ("1" to "0"): max. 500 µs.

Switching Frequency

The 6ES7322-1BH01-0AA0 has defined maximum switching frequencies.

• Resistive Load: max. 100 Hz.

• Inductive Load: max. 0.5 Hz (acc. to IEC 60947-5-1, DC13).

• Lamp Load: max. 10 Hz.

Total Current per Group

The 6ES7322-1BH01-0AA0 has current limits based on installation orientation.

Horizontal Installation:

• Up to 40°C: max. 4 A per group (8 A per module).

• Up to 60°C: max. 3 A per group.

Vertical Installation:

• Up to 40°C: max. 2 A per group.

Therefore, consider ambient temperature and installation orientation when sizing loads.

Parallel Switching of Outputs

The 6ES7322-1BH01-0AA0 has specific parallel switching capabilities.

• For Uprating: No.

• For Redundant Control of a Load: Yes.

Cable Length

The 6ES7322-1BH01-0AA0 supports standard cable lengths.

• Shielded: max. 1,000 m.

• Unshielded: max. 600 m.

Interrupts and Diagnostics

The 6ES7322-1BH01-0AA0 has limited diagnostic capabilities.

• Alarms: No.

• Diagnostics Function: No.

• Diagnostic Alarm: No.

• Wire-Break Detection: No.

• Short-Circuit Detection: No.

• Fuse Blown Detection: No.

• Missing Load Voltage Detection: No.

LED Indicators:

• Status Indicator Digital Output: Yes (green, one per output).

• Rated Load Voltage PWR (green): No.

• Fuse OK FSG (green): No.

Potential Separation

The 6ES7322-1BH01-0AA0 provides isolation for noise immunity.

• Between Channels: Yes (in groups of 8).

• Between Channels and Backplane Bus: Yes (opto-coupler).

• Isolation Tested: 500 V DC.

Key Features

The 6ES7322-1BH01-0AA0 offers several advantages for digital output applications.

16 High-Density Outputs:
Provides 16 outputs in a 40mm wide module. Therefore, it saves rack space compared to lower-density modules.

Electronic Short-Circuit Protection:
Each output is protected electronically (typ. 1A response). Consequently, the module withstands short circuits without damage.

Inductive Shutdown Limitation:
Limits inductive shutdown voltage to L+ (-53V). Hence, it safely drives inductive loads like relays and solenoids.

Group Isolation:
Outputs are isolated in groups of 8 from the backplane bus. For this reason, ground loops are minimized.

Fast Switching for Resistive Loads:
Output delay is 100 µs (0 to 1) and 500 µs (1 to 0). Thus, it suits high-speed digital applications.

Wide Operating Temperature:
Operates from 0 to 60°C with derating. Therefore, it suits various industrial environments.

LED Status Indicators:
16 green LEDs show the status of each output point. Consequently, troubleshooting is faster.

Redundant Load Control Support:
Two outputs can be paralleled for redundant control of a single load. For this reason, it supports fail-safe applications.

Typical Applications

The 6ES7322-1BH01-0AA0 suits various digital output control applications.

• Solenoid valve control in industrial machinery.

• Relay and contactor switching.

• Pilot light and indicator driving.

• Small motor starting and stopping.

• High-density output applications for S7-300 systems.

Installation Guidelines

Install the 6ES7322-1BH01-0AA0 in an S7-300 rack. First, ensure the rack power supply can provide the required 80 mA from the backplane bus. Then, insert the module into an available slot.

Connect the 24V DC load voltage L+ (20.4-28.8V) to the module. The module draws up to 80 mA without load. Connect field devices to the 20-pin front connector. Each output can drive up to 0.5A (0.6A max.) with minimum load of 5 mA.

The module provides electronic short-circuit protection with a typ. 1A response threshold. Outputs are isolated in groups of 8. The total current per group is 4A at 40°C (horizontal) with derating at 60°C. For vertical installation, the limit is 2A.

What is in the Box

Please inspect all items upon delivery.

• Siemens 6ES7322-1BH01-0AA0 SM 322 digital output module.

• Installation instruction manual.

• Anti-static protective bag.

Note: 20-pin front connector is sold separately.

Frequently Asked Questions (FAQ)

1. How many digital outputs does the 6ES7322-1BH01-0AA0 have?

The 6ES7322-1BH01-0AA0 provides 16 digital outputs. Each output can source 0.5A (rated) at 24V DC.

2. Does this module provide short-circuit protection?

Yes. The 6ES7322-1BH01-0AA0 includes electronic short-circuit protection. The response threshold is typ. 1A per output.

3. What is the maximum switching frequency for resistive loads?

For resistive loads, the 6ES7322-1BH01-0AA0 can switch at up to 100 Hz. For inductive loads, the maximum is 0.5 Hz.

4. What is the total current per group at 40°C?

In horizontal installation up to 40°C, the 6ES7322-1BH01-0AA0 allows 4A per group (8A per module). In vertical installation, the limit is 2A per group.

5. Can two outputs be paralleled for a higher current load?

No. Parallel switching for uprating is not permitted. However, two outputs can be paralleled for redundant control of a single load.