In 48 V systems and UPS battery strings, the DC current tells you whether an overload is building or the battery is discharging. The 100A DC Current probe 1W-UNI measures up to 100 A in both directions with 2 % accuracy and reports via the 1-Wire UNI bus to Poseidon2 or Ares.
Benefits
- Direction aware: charging reads positive, discharging negative.
- Wide range: 0-100 A DC with 0.1 A resolution.
- Low loss: 0.6 mOhm shunt, 60 mV drop at 100 A.
- Isolated: the 1-Wire UNI bus is electrically isolated from the measured circuit.
- Bus powered: 5 V via RJ11 at 3 mA, no power supply needed.
Technical data
| Measured value | DC current, bidirectional |
|---|
| Measuring range | 0-100 A DC |
|---|
| Accuracy | 2 % |
|---|
| Resolution | 0.1 A |
|---|
| Shunt | 0.6 mOhm, 60 mV at 100 A |
|---|
| Circuit voltage | max. 60 V |
|---|
| Shunt to converter cable | 1 m, fixed length |
|---|
| Calibration points | 8 |
|---|
| Interface | 1-Wire UNI, 2x RJ11 for daisy-chaining |
|---|
| Sensors per active port | max. 2 |
|---|
| Galvanic isolation | Yes |
|---|
| Power supply | 5 V via RJ11 (1-Wire bus) |
|---|
| Consumption | 3 mA |
|---|
| Operating conditions | 0 to +40 °C, 0 to 80 % RH |
|---|
| Storage conditions | -10 to +60 °C, 0 to 80 % RH |
|---|
| Converter dimensions (W x H x D) | 79 x 68 x 30 mm |
|---|
| Protection | IP23 |
|---|
| Mounting | DIN rail, desktop, indoor use only |
|---|
| Warranty | 24 months |
|---|
| Manufacturer part number | 600678 |
|---|
Applications
- Battery strings of large UPS systems in data centers
- 48 V DC power in telecom equipment
- 12 V or 24 V DC systems, for example in railway technology
- Early warning of overload and current direction changes
Scope of delivery
- DC current sensor 0-100 A, consisting of shunt and matched 1-Wire UNI converter
- Shunt and converter are calibrated as a pair and cannot be swapped
Compatibility
- Connects to 1-Wire UNI RJ11 ports on Poseidon2 and Ares
- For currents up to 30 A, choose the 30A DC Current probe 1W-UNI (600677)