Siemens 6ES7422-7BL00-0AB0
SM 422 digital output, 32 DO, 24 V DC, 0.5 A, diagnostics
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Siemens SIMATIC S7-400 SM 422 digital output module: 32 isolated outputs, 24 V DC, 0.5 A, with wire-break and short-circuit diagnostics and interrupts.
- Manufacturer
- Siemens
- Manufacturer part no.
- 6ES7422-7BL00-0AB0
- Product family
- SIMATIC S7-400 PLC CPUs, I/O and Function Modules
- Type
- Digital output module
- Category
- PLCs and I/O › Digital I/O modules
- Lifecycle
- Discontinued
- OEM successor
- Not stated
- Technical datasheet
- Data sheet
Technical specifications
- Manufacturer
- Siemens
- Manufacturer part no.
- 6ES7422-7BL00-0AB0
- Type
- Digital output module
- Application
- Digital output module
- Used with
- SIMATIC S7-400 rack
- Load voltage L+ / Rated value (DC)
- 24 V
- Load voltage L+ / permissible range, lower limit (DC)
- 20.4 V
- Load voltage L+ / permissible range, upper limit (DC)
- 28.8 V
- Input current / from load voltage L+ (without load), max.
- 120 mA
- Input current / from backplane bus 5 V DC, max.
- 200 mA
- Power loss, typ.
- 8 W
- Number of digital outputs
- 32
- Digital outputs / Short-circuit protection
- Yes; Clocked electronically
- Short-circuit protection / Response threshold, typ.
- 0.75 to 1.5 A
- Digital outputs / Limitation of inductive shutdown voltage to
- L+ (-45 V)
- Controlling a digital input
- Yes; possible
- Switching capacity of the outputs / on lamp load, max.
- 5 W
- Load resistance range / lower limit
- 48 Ω
- Load resistance range / upper limit
- 4 kΩ
- Output voltage / for signal "1", min.
- L+ (-0.8 V)
- Output current / for signal "1" rated value
- 0.5 A
- Output current / for signal "1" permissible range, min.
- 5 mA
- Output current / for signal "1" permissible range, max.
- 600 A
- Output current / for signal "0" residual current, max.
- 0.5 mA
- Parallel switching of two outputs / for uprating
- Yes; possible (only outputs of the same group)
- Parallel switching of two outputs / for redundant control of a load
- Yes; possible (only outputs of the same group)
- Switching frequency / with resistive load, max.
- 100 Hz
- Switching frequency / with inductive load, max.
- 2 Hz
- Switching frequency / with inductive load (acc. to IEC 60947-5-1, DC13), max.
- 2 Hz
- Switching frequency / on lamp load, max.
- 2 Hz
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- Total current of the outputs (per group) / all mounting positions / up to 40 °C, max.
- 4 A
- Total current of the outputs (per group) / all mounting positions / up to 60 °C, max.
- 2 A
- Cable length / shielded, max.
- 1 000 m
- Cable length / unshielded, max.
- 600 m
- Interrupts/diagnostics/status information / Diagnostics function
- Yes; Parameterizable
- Alarms / Diagnostic alarm
- Yes; Parameterizable
- Alarms / Hardware interrupt
- Yes; Parameterizable
- Diagnoses / Diagnostic information readable
- Yes
- Diagnoses / Wire break
- Yes; <0.15 mA
- Diagnoses / Short-circuit
- Yes; > 1 A (typ.)
- Diagnostics indication LED / internal fault INTF (red)
- Yes
- Diagnostics indication LED / external fault EXTF (red)
- Yes
- Diagnostics indication LED / Status indicator digital output (green)
- Yes
- Potential separation digital outputs / between the channels
- Yes
- Potential separation digital outputs / between the channels, in groups of
- 8
- Potential separation digital outputs / between the channels and backplane bus
- Yes
- Isolation tested with
- 500 V DC
- Width
- 25 mm
- Height
- 290 mm
- Depth
- 210 mm
- Weight, approx.
- 600 g
Technical documents (1)
Key features
- 32 digital outputs, 24 V DC, 0.5 A each
- Wire-break and short-circuit diagnostics
- Parameterizable diagnostic and hardware interrupts
- Clocked electronic short-circuit protection; isolated in groups of 8
- Discontinued by Siemens on 1 October 2026
About the Siemens 6ES7422-7BL00-0AB0
The Siemens 6ES7422-7BL00-0AB0 is the diagnostic version of the 32-channel SM 422: like the 6ES7422-1BL00-0AA0 it has 32 outputs at 0.5 A, and it adds wire-break and short-circuit diagnostics and parameterizable interrupts. Siemens's data sheet gives a 24 V DC load voltage (20.4 to 28.8 V), isolation in groups of 8 and 8 W typical power loss; Siemens's description gives a 0.15 ms output delay. SiePortal shows its phase-out announced on 1 October 2025 and its product cancellation on 1 October 2026.
What is the 6ES7422-7BL00-0AB0 used for?
It switches 24 V DC loads from an S7-400 CPU where a broken cable or a shorted output has to show up in the program.
Lifecycle and successor
Discontinued.
Before you order
What to photograph or confirm so the right unit is quoted.
Check the order number on the module: 7BL00 is the diagnostic version, 1BL00 the standard one.
Other parts in the Siemens SIMATIC S7-400 family
Listed for reference. They differ from the 6ES7422-7BL00-0AB0 in rating, supply, interface or function and are not interchangeable with it unless Siemens says so. Match the part number on your unit.
| Product | Type | Lifecycle | Qty Available | Price | Action |
|---|---|---|---|---|---|
| Siemens 6ES7421-1BL01-0AA0SM 421 digital input, 32 DI, 24 V DC | Digital input module | Discontinued | On Request | On request | View |
| Siemens 6ES7422-1BL00-0AA0SM 422 digital output, 32 DO, 24 V DC, 0.5 A | Digital output module | Discontinued | On Request | On request | View |
| Siemens 6ES7421-7BH01-0AB0SM 421 digital input, 16 DI, 24 V DC, interrupt and diagnostics | Digital input module | Discontinued | On Request | On request | View |
| Siemens 6ES7421-1EL00-0AA0SM 421 digital input, 32 DI, 120 V AC/DC | Digital input module | Discontinued | On Request | On request | View |
| Siemens 6ES7421-1FH20-0AA0SM 421 digital input, 16 DI, 120/230 V AC/DC | Digital input module | Discontinued | On Request | On request | View |
| Siemens 6ES7421-7DH00-0AB0SM 421 digital input, 16 DI, 24 to 60 V AC/DC, interrupt and diagnostics | Digital input module | Discontinued | On Request | On request | View |
| Siemens 6ES7422-1BH11-0AA0SM 422 digital output, 16 DO, 24 V DC, 2 A | Digital output module | Discontinued | On Request | On request | View |
| Siemens 6ES7422-1FH00-0AA0SM 422 digital output, 16 DO, 120/230 V AC, 2 A | Digital output module | Discontinued | On Request | On request | View |
| Siemens 6ES7422-1HH00-0AA0SM 422 relay output, 16 DO, 5 A | Digital output module | Discontinued | On Request | On request | View |
| Siemens 6ES7431-1KF00-0AB0SM 431 analog input, 8 AI, 13 bit, U/I/R | Analog input module | Discontinued | On Request | On request | View |
| Siemens 6ES7431-1KF10-0AB0SM 431 analog input, 8 AI, 14 bit, U/I/R/thermocouple/RTD | Analog input module | Discontinued | On Request | On request | View |
| Siemens 6ES7431-1KF20-0AB0SM 431 analog input, 8 AI, 14 bit, 0.42 ms for all channels | Analog input module | Discontinued | On Request | On request | View |
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