Description
Siemens SIMATIC S7‑300 6ES7322-1BH01-0AA0 – SM 322 Digital Output Module, 16×24 VDC/0.5 A
The 6ES7322-1BH01-0AA0 is a SIMATIC S7‑300 SM 322 digital output module, typically used to drive 24 VDC field devices—solenoid valves, indicator lamps, interposing relays—directly from the PLC rack. From my experience, it’s a dependable 16‑channel DO card with clear status LEDs and the familiar 20‑pin front connector, so maintenance swaps are quick and field wiring stays undisturbed. You might notice the two output groups make it easy to segregate supplies or isolate sections during commissioning.
Company’s Order Placement Process and Guarantees
- Warranty period: 365 days
- Delivery time: 1 week for in‑stock; no more than one month at the latest
- Payment method: 50% advance payment, full payment for delivery
- Express delivery methods: FedEx, UPS, DHL
- Process: Confirm model and quantity → Proforma Invoice → Advance payment → Functional testing and packing → Final payment → Express shipment with tracking
Key Features
- 16 digital outputs, 24 VDC – Rated up to 0.5 A per channel, suitable for coils, relays, and beacons.
- Two output groups – Typically arranged as 2×8 channels with separate L+ and M, handy for isolating sections or differing fusing.
- Transistor output design – Fast switching with good longevity; works well with proper flyback suppression on inductive loads.
- Front status LEDs – Channel indicators speed up loop checks and fault finding.
- Plug‑and‑play in S7‑300 racks – Uses the 20‑pin front connector so existing field terminations can remain in place.
Technical Specifications
| Brand / Model | Siemens SIMATIC S7‑300 – 6ES7322-1BH01-0AA0 (SM 322 DO 16×24 VDC/0.5 A) |
| HS Code | 853710 (Programmable controller modules) |
| Power Requirements | Module electronics via S7‑300 backplane; output load supply 24 VDC (L+/M) per group |
| Dimensions & Weight | Approx. 125 × 40 × 120 mm; ~0.25 kg class (standard S7‑300 footprint) |
| Operating Temperature | Typically 0…60 °C cabinet ambient for S7‑300 modules |
| Signal Output Types | 16× digital outputs, 24 VDC, up to 0.5 A/channel; transistor (sourcing) outputs with electronic protection in many cases |
| Communication Interfaces | SIMATIC S7‑300 backplane bus; no user Ethernet/serial on module |
| Installation Method | DIN‑rail mounting in S7‑300 rack; 20‑pin front connector to field wiring |
Application Fields
Ideal wherever clean 24 VDC actuation is needed from an S7‑300:
- Discrete automation: solenoids, stack lights, contactor coils via interposing relays
- Process skids: valve actuators, blowdown valves, dosing pumps
- Infrastructure: MCC run/stop, damper drives, utility signals
- Brownfield S7‑300 maintenance or expansion where like‑for‑like replacement is preferred
Advantages & Value
- Reliability: Stable switching and clear diagnostics—typically fewer nuisance faults when coils are suppressed properly.
- Compatibility: Native S7‑300 addressing and mechanics; existing 20‑pin connectors can be reused.
- Density & cost: 16 outputs per card helps keep cabinet space and per‑loop costs down.
- Support: We can function‑test channels (load switching and LED status) and share a brief report before shipment.
“Replaced two DO cards with 6ES7322‑1BH01‑0AA0 during a weekend shutdown. Field connectors stayed put, outputs checked out fast, and start‑up was smoother than last time.” — Maintenance lead, packaging line
Installation & Maintenance
- Cabinet setup: Mount on the S7‑300 rail with adequate ventilation; follow rack slotting rules.
- Wiring practices: Provide clean 24 VDC L+ per group; segregate DO wiring from VFD/motor cables; use ferrules.
- Inductive loads: Fit flyback diodes or RC snubbers to protect outputs and reduce noise.
- Handling & safety: Power down before insertion/removal; observe ESD precautions.
- Routine care: Periodic dust removal, terminal torque checks, and proof tests on critical outputs.
Quality & Certifications
- Certifications: CE; UL/cUL for control panels (typical for SIMATIC S7‑300 modules); RoHS by series.
- Manufacturer quality: Produced under ISO 9001 quality systems.
- Warranty: 365‑day warranty from shipment date.
Share your rack layout, field load types (coil currents and suppression), and how you group L+ supplies, and we’ll confirm the 6ES7322-1BH01-0AA0 fit and prepare a quick functional test record before dispatch.
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