
Product Description
Quick Procurement Facts
- Part Number: 6ES7332-7ND00-0AB0
- Description: 4 AO, 4–20 mA, 13-bit, HART Protocol, Isolated
- Condition: Factory New Sealed in Original Siemens Packaging
- Warranty: 24 months (with full HART calibration & loop test report)
- Dispatch: 24-hour global shipping from EU/US stock
- Channels: 4 fully isolated 4–20 mA outputs with integrated HART modem (point-to-point & multidrop)
Why 6ES7332-7ND00-0AB0 Is Still the HART Standard in 2025
- Native HART 7 communication – direct digital access to smart valves, positioners and transmitters
- 4-channel galvanic isolation – perfect for mixed Ex/non-Ex loops in refineries and chemical plants
- No external HART multiplexer needed – saves cabinet space and wiring cost
- Still the most installed HART AO module in S7-300 systems worldwide
Typical Failure Symptoms Driving Immediate Orders
- HART communication lost on channel 2 (no device response)
- OB82 alarm: “Open circuit channel 1” or “HART modem fault”
- Valve positioner stuck at last value despite correct 4–20 mA signal
- Annual proof-test failure on safety-instrumented loops
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Siemens SIMATIC S7-300 |
| Order Number | 6ES7332-7ND00-0AB0 |
| Analog Outputs | 4 × 4–20 mA (active, loop-powered option) |
| Resolution | 13 bit (0.3 % FS) |
| HART Protocol | HART 7, point-to-point & multidrop |
| Accuracy | ±0.1 % at 25 °C |
| Isolation | 500 V DC channel-to-channel & backplane |
| Load Capability | ≤ 750 Ω (active mode) |
| Update Time | 30 ms per channel + HART cycle |
| Diagnostics | Wire-break, short-circuit, HART status |
| Power Loss | 4.5 W typical |
| Front Connector | 20-pin (6ES7392-1AJ00-0AA0 required) |
| Dimensions (W×H×D) | 40 × 125 × 120 mm |
| Weight | 0.26 kg |
| Operating Temp | 0 to +60 °C |
Compatibility & Alternatives
- Direct replacement for: 6ES7332-7ND02-0AB0 (same pin-out)
- S7-1500 HART successor: 6ES7532-5ND00-0AB0
- Cross: Emerson DeltaV CHARM AO HART, Yokogawa AAI543-H