Description
The Siemens 6ES7222-1BH32-0XB0 is a SIMATIC S7-1200 Signal Module SM 1222, 8 Digital Outputs (DQ) — 24V DC transistor (sinking/sourcing capable depending on wiring), 0.5A per point. It expands the local I/O capacity of S7-1200 CPUs (CPU 1211C/1212C/1214C/1215C/1217C) by adding 8 or 16 DO channels in a compact 35mm-wide module. Related models listed — 6ES7222-1BF32-0XB0 (16 × 24V DC DQ, 0.5A) and 6ES7222-1HH32-0XB0 (8 × Relay Output, 2A/NO) — cover higher density and AC/relay switching needs.
All SM 1222 modules are auto-detected by TIA Portal, require no DIP-switch addressing, and draw power from the S7-1200 backplane (5V DC). They feature per-point status LEDs and group-level diagnostic LEDs (error/status).
Key Features
- Expansion: Plugs directly to right of S7-1200 CPU or to another SM 12xx module.
- Auto-Addressing: TIA Portal automatically assigns I/Q addresses (modifiable).
- Diagnostics: Per-channel LED + module error LED; wire-break detection on some transistor versions (with diagnostic interrupt enabled).
- Backplane Powered: 5V DC from CPU backplane (check CPU’s total 5V current budget).
- Country of Origin: Germany / Romania (Siemens Global)
Model & Specification Table
Order Number | Output Type | Channels | Voltage / Current Rating | Typical Use |
|---|---|---|---|---|
6ES7222-1BH32-0XB0 | Transistor (24V DC) | 8 DO | 24V DC, 0.5A/pt, 2A/common | Solenoid valves, indicator lamps, servo enables |
6ES7222-1BF32-0XB0 | Transistor (24V DC) | 16 DO | 24V DC, 0.5A/pt, 4A/common (2 grps) | High-density DC load switching |
6ES7222-1HH32-0XB0 | Relay (NO) | 8 DO | 5…30V DC / 5…250V AC, 2A/pt, 5A/common | AC loads, mixed AC/DC, isolation needed |
💡 Transistor vs Relay:
Technical Specifications (Representative — 6ES7222-1BH32-0XB0, 8×24V DC DQ)
Parameter | Specification |
|---|---|
Model / Order Code | 6ES7222-1BH32-0XB0 (SM 1222, 8 DQ × 24V DC) |
Outputs | 8 × Solid-State Transistor (Low-Side Switch / Sinking — typical PNP wiring) |
Rated Load Voltage | 20.4 … 28.8 V DC (nominal 24V DC) |
Max. Output Current | 0.5 A / point; 2.0 A per common (group) |
Lamp Load (Incandesc.) | Max. 5 W (at 24V DC) |
Switching Frequency | ≤ 100 Hz (resistive); ≤ 0.5 Hz (inductive with suppression) |
Cable Length (Unshielded/Shielded) | Max. 500 m / 200 m |
Backplane Current Draw (5V) | ~ 45 mA (SM 1222 8-ch); ~ 80 mA (16-ch BF32) |
Isolation | 500V AC (I/O to backplane); 500V AC (between groups — 1 group on BH32) |
Status Indicators | 8 × green LEDs (per-point ON), 1 × green PWR, 1 × red ERR |
Mounting | 35 mm DIN rail (EN 60715) — right-side expansion bus to CPU / preceding module |
Dimensions (W×H×D) | 35 mm × 100 mm × 75 mm (S7-1200 standard width) |
Weight | ~ 0.15 kg |
Standards | CE, UL 508, CSA C22.2 No. 142, FM Class I Div 2, RoHS |
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty
- Technical support for:
- S7-1200 backplane 5V current budget check (CPU 1214C e.g. supplies max ~ 1.2A 5V for all SMs)
- PNP vs NPN wiring clarification for transistor outputs
- Relay output contact protection (RC snubber / diode for inductive DC loads)
- TIA Portal addressing & forcing/test mode
- Cross-reference vs. S7-300 SM 322 (NOT compatible — different form factor & bus!)
Delivery Time
- Standard delivery: 3-5 working days (stock items)
- Express shipping available upon request
Why Choose Our Store
- Genuine Siemens SIMATIC S7-1200 components — not refurbished-clone or gray-market
- Global supply network with competitive pricing
- Expertise in S7-1200 / S7-1500 / S7-300 migration & local I/O expansion
- Comprehensive technical documentation (TIA Portal sample project, dimensional drawings, wiring diagrams)
- Responsive customer service and support
Applications
- Machine-level digital outputs (solenoid valves, indicator beacons, stack lights)
- Servo / stepper drive enable signals
- Conveyor divert / stopper control (via interposing relay if >0.5A)
- Test stands requiring fast solid-state DO (transistor version)
- S7-1200 based control panels needing local expansion beyond CPU onboard I/O
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