Obvius A8812 - Hardware Overview; A8812 Features and Specifications

Hardware Overview
A8812 Features and Specifications
Processor Arm9 embedded CPU, Arm7 io coprocessor
Operating System Linux 2.6
Memory 32 MB ram, 16 MB flash
LED 8x input, 4 modem activity, Modbus TX/RX, power, system, io status
Console 2 x 16 character LCD, two pushbuttons
LAN RJ45 10/100 Ethernet, full half duplex, auto polarity
Modem V.34 bis, 33,600 bps (A8812-1 only)
GSM/GPRS Cellular (A8812-GSM only)
Protocols Modbus/RTU, Modbus/TCP, TCP/IP, PPP, HTTP/HTML, FTP, NTP, XML, SNMP-Trap
Power Supply 24VDC, 1A, class 2 wall brick transformer.
North America: 110-120VAC, 60hz, primary. (standard, included)
CE/Europe: 100-240VAC, 50-60hz, primary, with interchangeable plug adapters. (optional)
Interval Recording User selectable 1-60 minutes. Default 15 minute interval
Serial Port
1
RS-485 Modbus, supports up to 32 external devices (expandable)
Inputs
1
8 flex-io inputs with multiple modes: voltage, current, resistance, pulse and status.
Voltage mode: 0-10vdc (min/max/average/instantaneous data)
accuracy: +- 0.25% of full scale at 20ºc
Current mode: 4-20mA (min/max/average/instantaneous data)
accuracy: +- 0.25% of full scale at 20ºc
Resistance mode: 100 ohms to 100k.
accuracy: 100Ω-1kΩ +- 1% of 1kΩ at 20ºc
1kΩ – 10kΩ +- 1% of 10kΩ at 20ºc
10kΩ – 47.5kΩ +- 1% of 47.5kΩ at 20ºc
47.5kΩ – 100kΩ +- 1% of 100kΩ at 20ºc
100kΩ − 10MΩ accuracy unrated.
Pulse mode: intended for use with dry contact outputs. (consumption/rate/runtime/status)
Standard and KYZ modes for form A and C relay outputs
Input terminal supplies 3V ~ 5V at 5mA sense voltage to detect contact closures.
Maximum rate: 10hz, minimum pulse width 50ms.
Adjustable contact closure threshold: 100Ω to 5kΩ, broken wire sense above 10kΩ optional.
Pulse count and runtime values are stored in non-volatile memory.
Outputs
1
: 2 optically isolated outputs type: opto-fet, dry contacts. rating: 30vdc, 150mA max.
Isolation
2
: The RJ45 ethernet, RJ11 Modem, pulse outputs, and the primary side of the power adapter are
electrically isolated from the AcquiSuite main PCB board and inputs.
Environmental North America: Indoor, temperature 0º - 50ºc, 0 - 95% humidity, non-condensing.
CE/Europe: Indoor, temperature 5º - 40ºc, 0 - 90% humidity, non-condensing.
EMC FCC CFR 47 Part 15, Class A
EN 61000, EN 61326
Size 8” x 9.25” x 2.5” (203mm x 235mm x 64mm)
Mass 5lbs (2.3kg)
1
inputs are intended for low voltage class 2 outputs.
2
if the product is used in a manner not specified by the
manufacture, the protection provided by the equipment
may be impaired.
Page 6 A8812 AcquiSuite – Data Acquisition Server
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