Obvius A89DC-08 DC Current Monitor

Model: A89DC-08

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Obvius A89DC-08 DC Current Monitor

Model: A89DC-08

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Designed for monitoring the performance of photovoltaic arrays, the A89DC-08 offers 8 individual current inputs via built-in Hall-effect CTs. Includes MODBUS-RTU communications

Discontinued!

This product has been discontinued and is no longer available. There are no replacement options.

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Obvius A89DC-08 Offers

The Obvius A89DC-08 Multi Circuit DC Monitor (Solar Current Monitor) provides users of photovoltaic solar arrays with direct real time access to the generation capacity of their renewable applications. The SCM is an 8 channel Modbus RTU based direct current monitor specifically designed for solar installations.

By providing users with real time average generation capacities of each active channel, the module can generate alarms based upon user selectable thresholds. For example, if one cell on an array were to be generating less than the current average of the overall installation by a user selectable predetermined percentage, an alarm would be activated notifying the user. By using this now readily available data, users are able to circumvent days, sometimes weeks of losses in their solar arrays generation capabilities through proactive maintenance and monitoring.

The A89DC-08 DC current monitor system is designed to allow measurement and alarming of DC current applications
including solar pv arrays, battery monitoring and DC power supplies for telecom switch gear.

The A89DC-08 uses 8 non-contact DC Hall Effect sensors to measure DC current on each of the 8 channels. DC current can be measured in both directions, showing positive and negative numbers in the resulting measurement values. Data values are made available via RS485 serial using the standard Modbus RTU protocol.

In addition to reporting the current values of each channel, the A89DC-08 also provides alarm functions to monitor imbalances between channels. This feature is instrumental in detecting failed equipment in applications such as Solar PV
arrays.
ApplicationsThe A89DC-08 DC Current Monitor has several applications. These include:

DC Load Monitoring
Solar PV Power Generation
Battery Charge and Discharge monitoring

Key BenefitsInstallation is fast and easy

Hall Effect sensors monitor currents accurately without dangerous connections
Modbus output provides open protocol for flexibility in communications
ModHopper transceivers eliminate costly wiring runs
Setup and configuration is simple, saving time and money
MCDM is designed to be installed in either new construction or existing installations

Monitor key performance parameters and detect problems quickly

MCDM provides user-selectable options for detecting failed devices or panels
Find and fix problems in a timely manner before penalties are incurred

Obvius lets you integrate all the essential information into an easy to use system:

Wireless ModHopper transceivers from Obvius eliminate the need for costly wiring
Up to 247 MCDMs can be networked for wireless communications with ModHoppers
Obvius weather stations provide wireless Modbus data on critical conditions, including temperature, humidity, wind speed, wind direction and irradiance
AcquiSuite data acquisition server from Obvius provides plug and play ease for lowest installed cost with options for phone, LAN or cellular communications
Buildingmanageronline.com (BMO) web hosting service provides remote access to reports for multiple locations

A89DC-08 is a breakthrough DC current monitor that simple and cost effective to install
Specifically engineered to monitor DC current production in solar/PV applications
Eight seperate hall effect sensors monitor multiple lines and provide measurements per channel as well as totals
Alarm options provide notification when one channel deviates from the system average. This can provide alerts for failed solar panels or strings of panels.
RS485 Modbus output supports up to 32 devices per wire segment, and may be expanded with additional hardware
Use Plug and play connectivity for supported devices to the Obvius AcquiSuite data acquisition server

Obvius A89DC-08 Specifications

Processor	Arm7 embedded CPU
LED	Alive (green), RS485 TX, RX (yellow)
Protocol	Modbus RTU
Addressing	Modbuss address may be set from 1 to 247 via Modbus register.
Power Supply	Power input 24vdc at 382mA (power supply not included)
Inputs	8 DC Hall Effect Sensors, non-contact. Maximum range +50Amps to -50Amps DC at 600V DC The Hall Effect sensor openings are intended to be used with Insulated wire. Cat I measurement device4 0.49 inch by 0.35 inch opening for load wire.
Accuracy	±1% of full scale (±0.5A)
Measurements	DC current per channel, instantaneous and average Average DC current (of 8 channels), instantaneous and average
Alarming	Low alarm may set a percent of DC average of other channels. Alarms may be disabled below a minimum average current level. Minimum time for alarm may be set to prevent alarms on brief events. Unused channels may be disabled to exclude them from total and average calculations.
Communications	RS-485 (+, -, S), 9600 baud, N, 8, 1, two wire. Supports up to 32 external devices (expandable)
Isolation	The RS485 terminals electrically isolated to 1500V from the remainder of the A89DC-08 board.
Environmental	North America: Temperature 0 to 60°C, 0 to 95% humidity, non-condensing. Pollution Degree 2, Altitude up to 2000M. For indoor and outdoor use when used in an appropriate enclosure. The A89DC-08 must be mounted inside a NEMA rated electrical enclosure for safety and isolation requirements.
Safety	UL61010 Recognized File: E320540 (Model A89DC-08)
EMC	FCC CFR 47 Part 15, Class A
Size	10.25" x 2.5" x 1.75" (260mm x 64mm x 45mm)
Mass	0.83 lbs (0.375 kg)

¹ Outputs are intended for low voltage class 2 inputs.
² If the product is used in a manner not specified by the manufacture, the protection provided by the equipment may be impaired.
³ May be dependent on forced air cooling. See chapter on temperature in this manual for details.
⁴ WARNING: Not for use within measurement categories II, III or VIPage.

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Obvius A89DC-08 DC Current Monitor

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Description ➕➖

Obvius A89DC-08 Offers

DC Load Monitoring
Solar PV Power Generation
Battery Charge and Discharge monitoring

Key BenefitsInstallation is fast and easy

Hall Effect sensors monitor currents accurately without dangerous connections
Modbus output provides open protocol for flexibility in communications
ModHopper transceivers eliminate costly wiring runs
Setup and configuration is simple, saving time and money
MCDM is designed to be installed in either new construction or existing installations

Monitor key performance parameters and detect problems quickly

MCDM provides user-selectable options for detecting failed devices or panels
Find and fix problems in a timely manner before penalties are incurred

Obvius lets you integrate all the essential information into an easy to use system:

Wireless ModHopper transceivers from Obvius eliminate the need for costly wiring
Up to 247 MCDMs can be networked for wireless communications with ModHoppers
Obvius weather stations provide wireless Modbus data on critical conditions, including temperature, humidity, wind speed, wind direction and irradiance
AcquiSuite data acquisition server from Obvius provides plug and play ease for lowest installed cost with options for phone, LAN or cellular communications
Buildingmanageronline.com (BMO) web hosting service provides remote access to reports for multiple locations

Features ➕➖

A89DC-08 is a breakthrough DC current monitor that simple and cost effective to install
Specifically engineered to monitor DC current production in solar/PV applications
Eight seperate hall effect sensors monitor multiple lines and provide measurements per channel as well as totals
Alarm options provide notification when one channel deviates from the system average. This can provide alerts for failed solar panels or strings of panels.
RS485 Modbus output supports up to 32 devices per wire segment, and may be expanded with additional hardware
Use Plug and play connectivity for supported devices to the Obvius AcquiSuite data acquisition server

Specifications ➕➖

Obvius A89DC-08 Specifications

Processor	Arm7 embedded CPU
LED	Alive (green), RS485 TX, RX (yellow)
Protocol	Modbus RTU
Addressing	Modbuss address may be set from 1 to 247 via Modbus register.
Power Supply	Power input 24vdc at 382mA (power supply not included)
Inputs	8 DC Hall Effect Sensors, non-contact. Maximum range +50Amps to -50Amps DC at 600V DC The Hall Effect sensor openings are intended to be used with Insulated wire. Cat I measurement device4 0.49 inch by 0.35 inch opening for load wire.
Accuracy	±1% of full scale (±0.5A)
Measurements	DC current per channel, instantaneous and average Average DC current (of 8 channels), instantaneous and average
Alarming	Low alarm may set a percent of DC average of other channels. Alarms may be disabled below a minimum average current level. Minimum time for alarm may be set to prevent alarms on brief events. Unused channels may be disabled to exclude them from total and average calculations.
Communications	RS-485 (+, -, S), 9600 baud, N, 8, 1, two wire. Supports up to 32 external devices (expandable)
Isolation	The RS485 terminals electrically isolated to 1500V from the remainder of the A89DC-08 board.
Environmental	North America: Temperature 0 to 60°C, 0 to 95% humidity, non-condensing. Pollution Degree 2, Altitude up to 2000M. For indoor and outdoor use when used in an appropriate enclosure. The A89DC-08 must be mounted inside a NEMA rated electrical enclosure for safety and isolation requirements.
Safety	UL61010 Recognized File: E320540 (Model A89DC-08)
EMC	FCC CFR 47 Part 15, Class A
Size	10.25" x 2.5" x 1.75" (260mm x 64mm x 45mm)
Mass	0.83 lbs (0.375 kg)