Description
The Siemens SIMATIC S7-400 SM 422 (6ES7422-…) series are digital output modules designed for the S7-400 rack-based PLC system. They provide isolated or non-isolated switching of AC/DC loads such as contactors, indicator lamps, solenoid valves, and interposing relays. The listed models cover 32-point 24V DC transistor outputs (1BL00/1BH10/1BH11), 16-point 24V DC (1FH00), and 16-point 120/230V AC relay or triac outputs (1HH00), giving engineers flexibility for diverse plant-floor requirements.
Key Features
- S7-400 Rack Compatible: Plugs into central or extended rack (UR1/UR2/ER1/ER2) via backplane bus.
- Output Types:
- 1BL00 / 1BH10 / 1BH11 → 32 × DO 24V DC (0.5A), transistor (source/sink per variant), group-isolated.
- 1FH00 → 16 × DO 24V DC (2A), transistor, short-circuit proof.
- 1HH00 → 16 × DO 120/230V AC (2A), relay or triac (check sub-type), electrically isolated.
- Diagnostic LEDs: Per-channel status + module-level error/fault LED.
- Interrupt / Diagnostic Capability: Reports wire break, short circuit, overload to CPU (where supported by CPU & HW config).
- Country of Origin: Germany
Model & Specification Table
Model | Output Points | Voltage / Type | Current / Point | Isolation | Typical Use |
|---|---|---|---|---|---|
6ES7422-1BL00-0AA0 | 32 | 24 V DC, Transistor | 0.5 A | Group iso. (8 groups × 4 ch) | General DC load switching |
6ES7422-1BH10-0AA0 | 32 | 24 V DC, Transistor | 0.5 A | Group iso. (variant diff.) | Alt. to 1BL00 (check source/sink) |
6ES7422-1BH11-0AA0 | 32 | 24 V DC, Transistor | 0.5 A | Group iso. | Newer/alternate 32-ch version |
6ES7422-1FH00-0AA0 | 16 | 24 V DC, Transistor | 2.0 A | Channel/Group iso. | Higher current DC loads |
6ES7422-1HH00-0AA0 | 16 | 120/230 V AC, Relay/Triac | 2.0 A (AC) | Electrically isolated | AC solenoid / contactor / lamp loads |
⚠️ Important:
Technical Specifications (Representative – 6ES7422-1BL00-0AA0)
Parameter | Specification |
|---|---|
Module Type | SIMATIC S7-400, SM 422 Digital Output |
Output Channels | 32 × DO 24V DC |
Rated Load Voltage | 20.4 – 28.8 V DC (nominal 24V DC) |
Output Current (per ch) | 0.5 A (continuous), max. 2 A per group (8 ch/group, 4 groups) |
Lamp Load | 5 W (at 24V DC) |
Ohmic Load | 12 W (at 24V DC) |
Inductive Load (AC-15) | Refer to derating curve |
Cable Length (unshielded/shielded) | ≤ 600 m / ≤ 1000 m (depending on source) |
Response Time (ON→OFF / OFF→ON) | ≤ 0.1 ms / ≤ 0.5 ms (typ.) |
Diagnostic Functions | Wire break (with sense resistor load), short-circuit, group overload |
Backplane Current Draw | Typ. 90 mA from 5V backplane bus |
Power Dissipation | Approx. 6 – 8 W (depends on load) |
Dimensions (W×H×D) | 25 mm × 290 mm × 210 mm (S7-400 single-slot width) |
Weight | Approx. 0.75 kg |
Standards | IEC 61131-2, CE, UL, cULus, FM (selected models), RoHS |
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty
- Technical support for HW Config in STEP 7 (module substitution, address assignment)
- External fusing & cable sizing recommendations
- Troubleshooting SF/BASP LEDs & diagnostic buffer messages
Delivery Time
- Standard delivery: 3-5 working days (stock items)
- Express shipping available upon request
Why Choose Our Store
- Genuine Siemens SIMATIC S7-400 I/O modules
- Global supply network with competitive pricing
- Expertise in S7-400 system configuration, rack layout & redundant setups
- Comprehensive technical documentation (datasheets, GSD, HW config examples)
- Responsive customer service and support
Applications
- Process & discrete manufacturing automation (chemical, pharma, automotive)
- Drive & motor contactor control (via interposing relays if >2A)
- Plant-wide MCC (Motor Control Center) status & command outputs
- Signal towers, stack lights, audible alarms
- High-availability / redundant S7-400H systems (SM 422 fully supported)
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