Obvius A89DC-08 - Manual (Page 5)

Hardware Overview
A89DC-08 Features and Specifications
Processor Arm7 embedded CPU
LED Alive (green), RS485 TX, RX (yellow)
Protocol Modbus RTU
Addressing Modbus address may be set from 1 to 247 via Modbus register.
Power Supply Power input : 24vdc at 382mA.
(power supply not included)
Inputs 2 8 DC Hall Effect Sensors, non-contact.
Maximum range +50Amps to -50Amps DC at 600vdc
The Hall Effect sensor openings are intended to be used with Insulated wire.
Cat I measurement device
4
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
Total DC current (sum of 8 channels), instantaneous and average
Average DC current (of 8 channels), instantaneous and average
Alarming Low alarm may set as 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 1 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 2 North America: Temperature 0º – 60ºc 3 , 0 – 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.
WARNING: 4 Not for use within measurement categories II, III or VI
Page 5 A89DC-08 – DC Current Monitor