6 Channel AC Current Acquisition Alarm Controller with Modbus
Product No.: ZH-40068
Current range:100mA,500mA,1A,5A AC(Customized)
Voltage range:100V,250V,300V,400V(Customized)
Wide auxiliary power input: 10–30V DC (optional extended range)
Compact DIN-rail mountable design
DIN Rail 2500V Isolated 6-Channel AC Current Acquisition Alarm Controller with Relay Output & Modbus RTU/TCP
Product Overview
This product is a real-time measurement and acquisition module for 6-channel single-phase parameters such as current, power, and energy, featuring relay threshold alarm output. It uses high-precision instrument transformers to achieve signal isolation and sensing for each channel. Signal measurement employs a dedicated high-accuracy true RMS measurement chip, capable of accurately measuring RMS values of current, voltage, power, and other parameters across various waveforms. Corresponding threshold alarm parameters can be configured to enable unattended automatic alarm output. Communication interfaces include RS485 and Ethernet. It is widely used in equipment over-limit power alarms, production automation detection, equipment room monitoring, enterprise energy consumption monitoring, and big data analysis.
Product Features
1.6-channel single-phase AC power measurement; only 1 common voltage input and 6 load current inputs are required, making deployment convenient.
2.Can be used as a 7-channel AC signal alarm; customizable as a 7-channel AC current acquisition alarm device.
3.Features 7 relay outputs, with each relay corresponding to independently configurable alarm parameters.
4.4 alarm modes: supports upper limit, lower limit, upper-and-lower limit window, and zone alarm functions per channel.
5.Optional manual alarm control relay output function.
6.When Ethernet communication is selected, simultaneous dual-port output via RS485 (Modbus-RTU protocol) and Ethernet (Modbus-TCP protocol) is available.
7.Excellent stability: measurement accuracy is not affected by ambient temperature changes
Model Selection
ZH-40068-14N2/300V*#A:6-Channel Single-Phase Power Acquisition Alarm Module, 9V–30V DC Power Supply, RS485 Communication
ZH-40068-34N2/300V*#A:6-Channel Single-Phase Power Acquisition Alarm Module, 9V–30V DC Power Supply, RS485 + Ethernet Communication
ZH-40076-14N2/#A:7-Channel AC Current Acquisition Alarm Module, 9V–30V DC Power Supply, RS485 Communication
ZH-40076-34N2/#A:7-Channel AC Current Acquisition Alarm Module, 9V–30V DC Power Supply, RS485 + Ethernet Communication
Note: AC 220V power supply is optional. When equipped with 220V supply, the model suffix should be "-19N2" (the digit "9" in the model number denotes 220V power supply).
Technical Specification
260 grams
Applications
Parameter
Specification
Accuracy Class
Voltage, Current: 0.2%
Current Range
100mA, 500mA, 1A, 5A AC (default) and other customizable ranges (external miniature precision CT option available)
Voltage Range
100V, 250V, 300V (default), 400V AC
Operating Temperature
-40°C to +70°C
Data Update Interval
250 ms
Isolation Withstand Voltage
>2500V DC
Auxiliary Power Supply
+24V DC (9V–30V) or 220V AC optional
Rated Power Consumption
<3W
Output Interface
RS485 (Modbus-RTU) or Ethernet (Modbus-TCP; when Ethernet is selected, RS485 output is simultaneously available)
Output Data
Total voltage, frequency, and per-channel current, active power, reactive power, power factor, energy, etc
Communication Baud Rate
4800, 9600, 19200, 38400, 57600, 115200 bps
Data Format
8 data bits,odd/even/none parity,1 or 2 stop bits selectable
Relay Output
7-channel relay normally open (NO) contact output
Contact Rating
5A / 250V AC
Alarm Functions
4 modes configurable — undervoltage / overvoltage / upper-and-lower limit / zone alarm; manual command control also supported
Alarm Hysteresis (Deadband)
Configurable from 0.2% to 6% of range; factory default: 1%
Mounting Type
35mm DIN-rail mounting; Dimensions: 145 × 90 × 40 mm
Weight
1.Industrial Automation & Safety Interlocks:
Automated production line protection where abnormal current triggers immediate hardware relay shutdown or warning signals.
2.Power Distribution & Sub-stations:
Real-time multi-circuit AC load monitoring and unattended grid anomaly notification.
3.Equipment Aging & Burn-in Racks:
Overload protection and fault threshold tracking during electronic component stress testing.
Why choose us
1.Integrated Acquisition & Relay Protection:
Combines high-precision 7-channel current measurement with direct hardware relay trip outputs, removing the need for intermediate PLC logic for basic safety cutoffs.
2.Flexible Multi-Mode Alarm Logic:
Offers 4 distinct threshold configurations (Upper, Lower, Upper-Lower, and Zone monitoring) with adjustable hysteresis to prevent false alarms.
3.True Industrial Isolation:
Strong insulation protects monitoring hardware against severe electrical noise and ground loops in harsh factory environments.
4.Dual Communication Flexibility:
Standard RS485 (Modbus-RTU) and optional Ethernet (Modbus-TCP) interfaces provide seamless integration into modern IoT and SCADA architectures.
FAQ
Q1: Do these modules feature internal data logging storage?
A1: No. These are real-time acquisition and transmission modules designed to stream parameters instantly to a PLC, SCADA, or upper computer via Modbus. They do not contain internal flash storage for historical data logging.
Q2: Can the relay outputs be controlled manually?
A2: Yes, the controller supports manual command-driven relay output controls alongside automatic threshold alarm triggers.
Q3: What communication options are available?
A3: The unit features standard RS485 (Modbus-RTU) with optional Ethernet (Modbus-TCP) dual-port output capabilities.
Q4: What power supply options can I choose from?
A4: You can select either+24DC(9V-30V) or 220V AC auxiliary power depending on your cabinet requirements.
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