JSH-44123A 12-Channel DC Current + 1 Bus Voltage Monitor for Burn-in Testing
Product No.: JSH-44123A
Current inputs: 12 through-hole DC current channels
Voltage input: 1 total DC voltage channel
Nominal current range options: 5 A, 10 A, 20 A, 30 A, 40 A, 50 A, 60 A
Voltage range options: 5 V, 30 V, 60 V, 100 V, 300 V, 400 V, 600 V
JSH-44123A 12-Channel DC Current + 1 Bus Voltage Monitor for Burn-in Testing
Product Overview
Monitor 12 DC Circuits and One Bus Voltage in One Module
The JSH-44123A is designed for test systems that need to monitor multiple DC current paths together with a shared supply voltage. It combines 12 through-hole current inputs and one isolated voltage input, allowing a PLC or industrial computer to collect circuit-level current readings and bus voltage through a single module.
Each current channel uses a closed-loop current sensor and an independent A/D converter. Synchronous sampling helps compare circuit behavior during the same acquisition cycle, while selectable update intervals allow the module to suit different test sequences.
The 8.5 mm sensor apertures accept conductors passed directly through the sensing holes. This avoids inserting an external measurement shunt into each monitored current path. Selectable nominal current ranges extend from 5 A to 60 A, with voltage ranges available up to 600 V.
RS485 models support Modbus RTU. Ethernet-equipped models add network communication with Modbus TCP support for integration into industrial monitoring systems.
Key Features
- 12 DC current inputs plus one voltage input:** Monitor multiple branches and their shared DC bus.
- Synchronous acquisition:** Independent A/D conversion for each current channel, with updates as fast as 10 ms.
- Closed-loop current sensing:** Integrated sensors eliminate the need for separate external current transducers within the selected range.
- Through-hole conductor routing:** 8.5 mm apertures simplify current sensing without external shunts.
- 0.2% FS accuracy:** Suitable for quantitative current monitoring in production and test equipment.
- Bidirectional DC measurement:** Signed registers support positive and negative current readings.
- Flexible communication:** RS485 Modbus RTU or RS485 plus Ethernet, depending on the model.
- Industrial installation:** 35 mm DIN-rail mounting and a 10–30 VDC auxiliary supply.
Model Selection
*A and *V identify the ordered current and voltage ranges. Confirm the complete configuration before ordering.
Model
Measurement Inputs
Communication
JSH-44123A-14P3/*A#*V
12 DC current inputs + 1 DC voltage input
RS485, Modbus RTU
JSH-44123A-34P3/*A#*V
12 DC current inputs + 1 DC voltage input
RS485 + Ethernet, Modbus RTU/TCP
JSH-41123A-14P3/*A#*V
12 AC/DC current inputs + 1 voltage input
RS485, Modbus RTU
JSH-41123A-34P3/*A#*V
12 AC/DC current inputs + 1 voltage input
RS485 + Ethernet, Modbus RTU/TCP
Technical Specifications
|
Parameter |
Specification |
|
Main model |
JSH-44123A |
|
Current inputs |
12 through-hole DC current channels |
|
Voltage input |
1 total DC voltage channel |
|
Current sensing |
Integrated closed-loop current sensors |
|
Accuracy |
0.2% FS |
|
Linearity |
0.1% |
|
Resolution |
1/10,000 of full scale |
|
Nominal current range options |
5 A, 10 A, 20 A, 30 A, 40 A, 50 A, 60 A |
|
Voltage range options |
5 V, 30 V, 60 V, 100 V, 300 V, 400 V, 600 V |
|
Sensor aperture |
8.5 mm |
|
Acquisition update intervals |
10, 20, 40, 60, 80, 100, 400 or 1000 ms |
|
Default update interval |
100 ms |
|
A/D conversion |
Independent current-channel A/D converters; 24-bit sampling |
|
Measurement modes |
Absolute-value and bipolar measurement |
|
Data formats |
Scaled 16-bit values and 32-bit IEEE 754 floating-point values |
|
Communication |
RS485; Ethernet available on selected models |
|
Protocols |
Modbus RTU / Modbus TCP, according to interface and configuration |
|
RS485 baud rates |
2400, 4800, 9600, 19200, 38400, 57600, 115200 bps |
|
Isolation withstand |
>2500 VDC between power, communication and measured voltage input |
|
Auxiliary supply |
10–30 VDC |
|
Rated power consumption |
<6 W |
|
Operating temperature |
−40°C to +70°C |
|
Mounting |
35 mm DIN rail or screw mounting |
|
Dimensions |
175 × 87 × 50 mm |
|
Weight |
Approximately 286 g |
The acquisition update interval describes the module’s internal measurement refresh. Actual host readout speed also depends on baud rate, polling sequence and network conditions.
Applications
1. Multi-Position Burn-in Test Racks
Monitor the DC output current of up to 12 test positions while measuring one shared supply voltage. A host system can compare readings against the expected current window for each product and identify positions that require inspection.
This arrangement is useful for DC-powered electronic products, power supply output testing and LED product burn-in equipment. Test limits, alarms and historical records are implemented in the connected PLC or computer.
2. DC Load Banks and Parallel Load Testing
Measure individual branch currents in a multi-branch DC load system. Synchronous acquisition helps engineers compare current distribution during load changes and investigate uneven loading between branches.
The single voltage input can monitor the common DC bus. Applications requiring a separate voltage measurement for every branch need additional voltage inputs.
3. Battery Charge and Discharge Test Equipment
Use bipolar DC current readings to distinguish charging and discharging current in compatible test circuits. Multiple channels allow one controller to collect current measurements from several test positions.
Select the current range, voltage range and insulation arrangement to match the test system. This module measures current and one total voltage; individual cell voltage monitoring requires a separate solution.
4. Automated Production Test Stations
Integrate current measurements into a PLC-controlled test sequence to check operating current at startup, standby or defined load conditions. Programmable update intervals allow acquisition to match the test process.
The controller can use these readings for pass/fail decisions, test reports and abnormal-current identification.
5. Multi-Branch DC Distribution Monitoring
Monitor outgoing DC feeder currents together with a common bus voltage in industrial equipment. Centralized readings help maintenance teams compare branch loading and investigate unexpected changes in current demand.
Why Choose JSH Electronic?
Shenzhen JSH Electronic Co., Ltd. supplies multi-channel measurement modules for industrial monitoring and automated test systems.
The JSH-44123A combines current sensing, signal conversion and Modbus communication in one module. Its 12-channel architecture helps consolidate measurement hardware, while the separate DC-average and AC/DC RMS versions allow selection according to the required measurement result.
For model selection, provide your current range, maximum voltage, conductor diameter, communication interface and required update interval.
FAQ
1. Can one module monitor 12 DC circuits simultaneously?
Yes. The JSH-44123A provides 12 current inputs with synchronous sampling and independent A/D conversion. It also includes one total voltage input.
2. Does the module require external shunts or current transformers?
The current sensors are integrated into the module. Pass each conductor through its corresponding 8.5 mm sensing aperture. External shunts or separate current sensors are not required within the ordered measurement range.
3. Can I install it around an existing cable without disconnecting the cable?
The sensors are through-hole types, not split-core clamps. The conductor must be threaded through the aperture. Check that the conductor and any attached connector can pass through the 8.5 mm opening before installation.
4. What is the difference between JSH-44123A and JSH-41123A?
JSH-44123A is the DC measurement version for DC average values. JSH-41123A is the AC/DC true RMS version. If a DC signal contains ripple, choose the version according to whether the required reading should exclude or include that AC component.
5. Can the module measure current in both directions?
Yes. The module supports bipolar DC measurement and provides signed registers for positive and negative readings. Follow a consistent conductor direction through the sensor apertures.
6. Is the 10 ms update interval the same as a 10 ms PLC polling cycle?
No. The 10 ms setting is the internal acquisition update interval. The time needed to transfer readings to a PLC or computer depends on communication settings and polling design.
7. Does it measure 12 separate voltages, power or energy?
It measures 12 currents and one total voltage input. It does not provide 12 independent voltage inputs, and the documented register map does not list power or energy outputs. Any additional calculations must be implemented in the host system using an appropriate measurement arrangement.
