Siemens 6ES7322-1BL00-0AA0 SIMATIC S7-300 SM 322 Digital Output Module

Overview

SIEMENS SIMATIC S7-300

6ES7322-1BL00-0AA0 SIMATIC S7-300 SM 322 Digital Output Module

Provide 32 transistor outputs for DC solenoid valves, contactors and signal lamps, with electrically isolated groups and per-channel status indication.

At a Glance

Brand	Siemens
Model	6ES7322-1BL00-0AA0
Product Type	Digital output module
Core Function	Switch DC field actuators
Application	S7-300 automation stations

Grouped output circuits

Four groups of eight outputs separate the load circuits.

Front connector wiring

A 40-pin front connector carries the actuator connections.

Load-aware installation

Group-current limits depend on cabinet temperature and mounting position.

Product Overview

6ES7322-1BL00-0AA0 is an SM 322 output module for operating 24 V DC field loads from a SIMATIC S7-300 station. Its 32 channels are electrically isolated in groups of eight and provide a rated output current of 0.5 A per channel.

Electronic short-circuit protection limits output faults, while individual green LEDs show channel status; the module does not provide diagnostic interrupts or readable channel diagnostics.

Ordering focus: Size each output group for its mounting position and ambient temperature, and include the 40-pin front connector in the installation plan.

Key Functions

Drive DC switching loads

The outputs operate solenoid valves, DC contactors and signal lamps within the specified current and lamp-load limits.

Separate field potential groups

Groups of eight channels are isolated from one another and from the backplane bus for grouped load-circuit wiring.

Indicate active channels locally

A green LED per channel provides a direct view of the output state during commissioning and maintenance.

Official Specifications

Output Channel Arrangement	32 channels in 4 electrically isolated groups of 8
Rated Load Voltage	24 V DC
Rated Output Current	0.5 A per channel; permitted ON-state range 5 mA to 0.6 A
Group Current, Horizontal Mounting	4 A up to 40 °C; 3 A up to 60 °C
Group Current, Vertical Mounting	2 A up to 40 °C
Backplane Current Consumption	Maximum 110 mA
No-Load Load-Supply Current	Maximum 160 mA
Typical Power Dissipation	6.6 W
Output ON-State Voltage	At least L+ minus 0.8 V
OFF-State Residual Current	Maximum 0.5 mA
Output Switching Delay	Maximum 100 µs OFF to ON; maximum 500 µs ON to OFF for resistive loads
Permitted Load Resistance	48 Ω to 4 kΩ
Lamp Load	Maximum 5 W per output
Maximum Switching Frequencies	100 Hz resistive; 0.5 Hz inductive DC13; 10 Hz lamp loads
Electronic Short-Circuit Protection	Typical response threshold 1 A
Isolation Test Voltage	500 V DC
Actuator Connection	40-pin front connector
Module Dimensions	40 × 125 × 120 mm (W × H × D)

Official source:Siemens product manual and technical specifications

Frequently Asked Questions

How many solenoid-valve outputs does 6ES7322-1BL00-0AA0 provide?

The module provides 32 outputs rated at 24 V DC and 0.5 A per channel.

Does 6ES7322-1BL00-0AA0 support Front connector wiring for mobile equipment?

Use a 40-pin front connector for the output and load-supply connections.

How should I derate 6ES7322-1BL00-0AA0 in a horizontally mounted rack at 60 °C?

Limit the total output current of each group to 3 A at 60 °C.

Can I parallel outputs of 6ES7322-1BL00-0AA0 to obtain a higher current?

No, parallel outputs are allowed only for redundant load control within the same group and cannot be used to increase output capacity.

Will 6ES7322-1BL00-0AA0 send a diagnostic interrupt for a channel fault?

No, the module provides channel-status LEDs but has no diagnostic interrupt or readable diagnostic function.

What lamp load can I connect to an output of 6ES7322-1BL00-0AA0?

Each output can switch a lamp load of up to 5 W.

What should I consider when switching the 24 V supply to 6ES7322-1BL00-0AA0 with a mechanical contact?

The circuit design can produce an ON signal of approximately 50 µs at the outputs when the load supply is switched on.

Compatibility & Ordering Notes

Before ordering 6ES7322-1BL00-0AA0: Choose the connector and load wiring for the four potential groups, then check the per-channel loads and temperature-dependent group current before ordering.

Compatibility Checklist for 6ES7322-1BL00-0AA0

• Configure the correct module and output addresses in the STEP 7 project.
• Keep redundant parallel outputs within the same output group.
• Account for the short switch-on pulse where connected equipment detects fast signals.
• Use channel LEDs for local status checks and do not expect module diagnostic interrupts.

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