Siemens 6ES7122-1BB00-0AA0 SIMATIC SC 2DO DC24V/0.5A Electronic Submodule

Overview

SIEMENS SIMATIC SC

6ES7122-1BB00-0AA0 SIMATIC SC 2DO DC24V/0.5A Electronic Submodule

A compact two-output 24 V DC submodule with electronic short-circuit protection and a nominal 0.5 A rating per channel.

At a Glance

Brand	Siemens
Model	6ES7122-1BB00-0AA0
Product Type	Digital output submodule
Core Function	Switching compact field actuators
Application	SIMATIC SC TB16SC terminal blocks

Two semiconductor outputs

Each output has a nominal 0.5 A ON-state rating.

Defined module derating

The two-channel total is 1 A up to 40 °C and 0.8 A up to 60 °C.

Plug-in SC construction

The electronic submodule fits the matching TB16SC terminal-block system.

Product Overview

6ES7122-1BB00-0AA0 provides two 24 V DC digital outputs in the SIMATIC Smart Connect terminal-block system.

The narrow plug-in module includes green output-state LEDs and electronic short-circuit protection, with different switching limits for resistive, inductive and lamp loads.

Ordering focus: Match the TB16SC slot, 0.5 A channel rating and temperature-dependent total current, and account for the output pulse that can occur when L+ is mechanically switched.

Key Functions

Drive compact DC loads

The two outputs each provide nominal 0.5 A switching for the intended field circuits.

Limit short-circuit current

Electronic output protection responds at a typical threshold of 0.7–1.8 A.

Support SC service replacement

The submodule plugs into the terminal block and permits up to twenty insertion cycles.

Official Specifications

Output channel count	2
Rated load supply	24 V DC
Rated current per output	0.5 A
Permitted ON-state channel current	5 mA–0.6 A
Maximum module total current	1 A up to +40 °C; 0.8 A up to +60 °C
Maximum OFF-state residual current	0.3 mA
Minimum ON-state output voltage	L+ minus 0.5 V
Maximum no-load supply current	3 mA
Typical module power loss	0.4 W
Resistive-load switching delay	ON: up to 200 µs; OFF: up to 1.3 ms
Permitted load resistance	48 Ω–4.8 kΩ
Maximum lamp load	2.5 W
Maximum switching rates	100 Hz resistive; 2 Hz inductive at 0.3 A or 0.5 Hz at 0.5 A; 1 Hz lamp
Electronic short-circuit response threshold	Typically 0.7–1.8 A
Maximum cable length	600 m unshielded; 1,000 m shielded
Insertion-cycle limit	20 into a TB16SC
Electrical isolation	None between outputs or between outputs and SC bus
Dimensions (W × H × D)	10 × 64 × 51 mm
Approximate submodule weight	15 g

Official source:Siemens ET 200L and SIMATIC SC equipment manual

Frequently Asked Questions

Can both outputs of 6ES7122-1BB00-0AA0 carry 0.5 A continuously at 60 °C?

No, the module total current is limited to 0.8 A at 60 °C.

How should I restore an output of 6ES7122-1BB00-0AA0 after clearing a short circuit?

If full-load restart fails, change the output signal, interrupt the module load voltage or temporarily disconnect the load.

Could mechanically switching L+ produce a short pulse at an output of 6ES7122-1BB00-0AA0?

Yes, the output can produce a transient pulse of about 8 µs at rated current to 20 µs at a 10 mA load when L+ is mechanically switched.

Can 6ES7122-1BB00-0AA0 drive a 5 W lamp on one output?

No, the maximum lamp load is 2.5 W.

Are the two outputs of 6ES7122-1BB00-0AA0 isolated from the SC bus?

No, there is no galvanic isolation between the outputs and SC bus.

How many times may 6ES7122-1BB00-0AA0 be inserted into its TB16SC terminal block?

The maximum permitted insertion count is twenty.

Can I parallel outputs of 6ES7122-1BB00-0AA0 for redundant control of one load?

No, the outputs may not be paralleled for redundant load control.

Compatibility & Ordering Notes

Before ordering 6ES7122-1BB00-0AA0: Use the intended TB16SC slot and DC load supply, observe the module total-current derating and avoid unintended actuator response during mechanical L+ switching.

Compatibility Checklist for 6ES7122-1BB00-0AA0

• Keep each output within its permitted current range.
• Respect the 0.8 A module limit at +60 °C.
• Do not use parallel outputs for redundant control.
• Use the specified short-circuit recovery procedure if restart fails.

Hot Selling Models