100A DC Current Probe 1W-UNI – DC current sensor for 100 A or 30 A
€315.70
The DC current sensor for 100 A or 30 A with shunt and 1-Wire-UNI converter
The HW group 100A DC Current probe 1W-UNI is a set consisting of a shunt and a converter that directly measures DC current up to either 100 A or 30 A (depending on the selected option). The shunt is inserted directly into the circuit to be measured (the conductor is interrupted for this purpose). The DC current is measured in both directions and differentiated by the sign.
The 1-Wire-UNI output can be connected to Poseidon2 or Ares devices. Together with one of these devices, the sensor can serve as an early warning system for overload or a change in current direction (charging/discharging). The sensor is suitable for monitoring the input power of 12 V, 24 V or −48 V DC systems, for example for monitoring battery charging or energy consumption in telecommunications applications.
Direct DC current measurement in both directions
The sensor provides a measured value of 0–100 A or 0–30 A DC (depending on the selected option), with the sign indicating the current direction.
Current range 0–100 A or 0–30 A DC
Measurement accuracy 2 %, resolution 0.1 A. The shunt has a resistance of 0.6 mΩ (100 A) or 2 mΩ (30 A) and produces a voltage drop of 60 mV at maximum current.
Measurement in both directions
When current flows from the positive to the negative terminal of the converter, a positive value is displayed; in the opposite direction a negative value is shown (battery charging “+”, discharging “−”).
Galvanic isolation
The 1-Wire-UNI bus is electrically isolated from the measured circuit; the maximum measured voltage is 60 V.
2× RJ11 (1-Wire UNI)
Two RJ11 connectors on the converter allow further 1-Wire sensors to be daisy-chained on the same bus.
Bus-powered
Supplied with 5 V (approx. 3 mA) directly via the 1-Wire-UNI bus; maximum of 2 sensors per active port.
8 calibration points
The sensor can be calibrated at 8 points using the 1Wire HWg-UniCalibrator calibration software.
Individually selectable: 100 A or 30 A
The sensor is available in two current ranges. Both variants are supplied as a set consisting of a shunt and a 1-Wire-UNI converter and are connected via the RJ11 connector (1W-UNI).
Please note: The options listed below must be selected above the add-to-cart button before placing the sensor in the shopping cart. Shunt and converter are matched to each other and must not be interchanged between variants.
0 to 100 A DC
0–100 A DC Current probe sensor. Connection via RJ11 1W-UNI. Shunt with 0.6 mΩ / 60 mV voltage drop at 100 A.
0 to 30 A DC
0–30 A DC Current probe sensor. Connection via RJ11 1W-UNI. Shunt with 2 mΩ / 60 mV voltage drop at 30 A.
What is included in the box
Depending on the selected option (100 A or 30 A), the sensor is supplied as a complete set with the matching shunt.
- Measuring shunt
- 1-Wire-UNI converter
- Printed manual
How the 100A DC Current probe 1W-UNI is constructed
The converter measures approximately 79 × 68 × 30 mm (W×H×D) and weighs about 66 g, with protection class IP23. It is intended for indoor use (industrial environments) and can be mounted on a wall or on a DIN rail. Operating conditions: 0 °C to 40 °C at 0–80 % RH (storage: −10 °C to 60 °C, 0–80 % RH).
Measuring shunt
The shunt is inserted directly into the path of the monitored current, regardless of polarity – either on the positive or negative pole of the circuit.
Two-wire connecting cable (1 m)
A 1 m two-conductor cable connects the shunt to the converter. This length is fixed and must not be altered.
1-Wire-UNI converter with 2× RJ11
The converter evaluates the voltage across the shunt and provides the measured value on the 1-Wire-UNI bus. Two RJ11 sockets connect it to a Poseidon2, Ares, Poseidon 4002 or Poseidon 2250 device and allow daisy-chaining of additional sensors.
Terminal polarity
The “+” terminal on the converter corresponds to the more positive voltage (e.g. the power-source side). The converter displays a positive value when current flows from the positive to the negative terminal.
Matched pair
For highest accuracy, the shunt and 1-Wire-UNI converter are matched to each other and must not be interchanged.
Technical data
- Current range: 0–100 A DC or 0–30 A DC (depending on option)
- Accuracy: 2 %, resolution: 0.1 A (technology: resistor/shunt)
- Shunt resistance / voltage drop at maximum current: 0.6 mΩ / 60 mV (100 A) or 2 mΩ / 60 mV (30 A)
- Maximum measured voltage: 60 V
- Cable length shunt – converter: 1 m (fixed)
- Galvanic isolation: yes (bus from measuring circuit)
- Number of values supplied: 1
- Unit converter: not available
Connection to Poseidon2, Ares and other HW group devices
The sensor is connected via the 1-Wire-UNI bus to compatible HW group devices, where it is detected and configured.
- All Poseidon2 and Ares models
- Poseidon 4002 and Poseidon 2250
- Up to 2 sensors per active RJ11 port
- Daisy-chaining of additional 1-Wire sensors via the second RJ11 port
Commissioning in a few steps
The sensor is detected and configured directly via the connected HW group device.
- Insert the shunt into the path of the DC current to be monitored (on the positive or negative pole, polarity-independent)
- Connect the shunt to the converter using the fixed 1 m two-conductor cable; assign the “+” terminal of the converter to the more positive voltage (source side)
- Connect the converter via RJ11 cable to a compatible Poseidon2, Ares, Poseidon 4002 or Poseidon 2250 device
- Allow the sensor to be detected automatically on the connected device and configure it via its web interface
- Set thresholds for overload as well as alarms for a change in current direction (charging/discharging)
Why the 100A DC Current probe 1W-UNI is the right choice
Two current ranges
Optionally 0–100 A or 0–30 A DC with 2 % accuracy.
Direction detection
Distinguishes charging and discharging via the sign.
Galvanically isolated
The 1-Wire bus is isolated from the measuring circuit.
For 12 V, 24 V and −48 V
Suitable for common DC supply systems in telecom applications.
Complete set
Shunt, converter and manual included in the scope of delivery.
24-month warranty
According to the manufacturer with a 24-month warranty from the date of purchase.
Practical application examples
- Monitoring the input power of telecom cabinets and BTS stations
- Monitoring battery charging
- Large UPS systems
- Telecommunications equipment
- Railway applications
Practical example: In a large UPS system the shunt is inserted into the cable between the battery and the UPS. The 100A DC Current probe 1W-UNI reports via a Poseidon2 or Ares device whether the battery is currently being charged (positive value) or discharged (negative value). In the event of overload or an unexpected change in current direction, the device immediately sends an alarm.
Frequently asked questions
What is the HW group 100A DC Current probe 1W-UNI and what is it used for?
The 100A DC Current probe 1W-UNI is a set consisting of a shunt and a 1-Wire-UNI converter for the direct measurement of DC current up to 100 A or 30 A (depending on the selected option). It is used to monitor overload, battery charging or a change in current direction in 12 V, 24 V and −48 V DC systems (e.g. telecom cabinets, UPS, railway applications).
What options are available?
The sensor is available in two current ranges: 0 to 100 A DC and 0 to 30 A DC. The desired option must be selected above the add-to-cart button. Each variant is supplied as a complete set consisting of shunt, converter and printed manual.
How is the shunt connected?
The shunt is inserted directly into the path of the monitored current, regardless of polarity, either on the positive or the negative pole of the circuit. It is connected to the converter via a fixed 1 m two-conductor cable.
Can I interchange the shunt and converter or extend the cable?
No. The length of the 1 m cable between shunt and converter is fixed. In addition, the shunt and converter are matched for highest accuracy and must not be interchanged.
How is the current direction indicated?
The converter displays a positive value when current flows from the positive to the negative terminal. The opposite direction is indicated by a negative value – for a battery, “+” corresponds to charging and “−” to discharging.
Which devices is the sensor compatible with?
The sensor can be connected to all Poseidon2 and Ares models as well as to Poseidon 4002 and Poseidon 2250. A maximum of 2 of these sensors can be operated per active RJ11 port.
How is the sensor powered?
The converter is powered directly via the 1-Wire-UNI bus (RJ11) with 5 V (approx. 3 mA) and does not require a separate power supply.
Questions about the 100A DC Current probe 1W-UNI?
Our support team in Germany provides free advice on selection, sensing technology and configuration.
HW-group 100A (30A) DC Current probe 1W-UNI
General Data
- DC current measuring probe for measuring direct currents up to 100 A or 30 A
- Measurement via a shunt that is directly integrated into the circuit to be measured
- Consists of measuring shunt and 1-Wire-UNI converter
- Suitable for monitoring power supplies in Telco cabinets and BTS stations
- Suitable for monitoring battery charging processes
- Can be used together with Poseidon2 or HWg-Ares as an early warning system for overcurrent or change in current direction (charging/discharging)
- Suitable for 12-V, 24-V, and 48-V DC systems
- Suitable for indoor applications
Measurement Data
- Measuring range 100-A version: 0–100 A DC
- Measuring range 30-A version: 0–30 A DC
- Measurement accuracy: 2%
- Resolution: 0.1 A
- Maximum measurable voltage: 60 V
Shunt
- 100-A version:
- Shunt resistance: 0.6 mΩ
- Voltage drop at maximum current: 60 mV
- 30-A version:
- Shunt resistance: 2 mΩ
- Voltage drop at maximum current: 60 mV
- The shunt is directly integrated into the measured circuit
Electrical Isolation
- The 1-Wire-UNI bus is electrically isolated from the measured circuit
Connection & Communication
- Interface: 1-Wire UNI
- 2 × 1W-UNI for daisy-chain connections
- Power supply: via the 1-Wire-UNI bus
- Maximum 2 sensors per active port
- Compatible with Poseidon2 and Ares devices
Wiring
- Cable length between shunt and converter: 1 m
Application Areas
- Monitoring of power supplies in Telco cabinets
- Monitoring of BTS stations
- Monitoring of battery charging processes
- Overcurrent detection
- Monitoring of current direction during charging and discharging
- Monitoring of high-performance UPS systems
- Monitoring of telecommunications equipment
- Monitoring in railway applications
Compatibility
- Poseidon2
- HWg-Ares
- Poseidon 4002
- Poseidon 2250
Scope of Delivery
- Measuring shunt
- 1-Wire-UNI converter
- Printed manual
Manufacturer information:
HW group s. r. o.
Rumunská 26
Prague, 120 00
Czech Republic
Phone: +420 222 511 918
Email: sales@hwg.cz
Responsible person:
Didactum® Security GmbH
Im Mühlenfeld 4
48163 Münster
Deutschland
Fon:
(+49) 250 19 71 63 54 / (+49) 171 33 11 577
Email: info@didactum-security.de
