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2 FEATURES AND SPECIFICATIONS
The A8332 is designed to read a variety of industry standard analog and pulse sensor devices and communicate the data
values back to a Modbus master system using RS485. Applications include data acquisition systems reading gas/water/
electric meters or analog sensors such as temperature, humidity, pressure, and flow.
Processor Arm7, field upgradeable firmware.
LED 8 input status LEDs (red), 2 Modbus TX/RX (yellow), 1 power/alive status. (green)
Protocols Modbus/RTU
Power Supply 24VDC, 200 mA3, required (not included) The unit is to be sourced by a Class 2 power supply
with the following output: 24VDC, 200 mA minimum but not to exceed 8A
Serial Port1RS485 two wire, 19200 or 9600 baud. 8NI
Inputs18 flex I/O 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: 4-20 mA (min/max/average/instantaneous data) accuracy:
+- 0.25% of full scale at 20oC
Resistance mode: 100 ohms to 100k.
Accuracy: 100Ω– 1kΩ+/- 1% of 1kΩat 20oC
1kΩ– 10kΩ+/- 1% of 10kΩat 20oC
10kΩ– 47.5kΩ+/- 1% of 47.5kΩat 20oC
47.5kΩ– 100kΩ+/- 1% of 100kΩat 20oC
100kΩ– 10mΩaccuracy 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 5V at 5 mA sense voltage to detect contact closures.
Maximum rate: 10Hz, minimum pulse width 50ms.
Adjustable contact closure threshold: 100Ωto 5 kΩ, broken wire sense above 10kΩoptional.
Pulse count and runtime values are stored in non-volatile memory.
Outputs1: 2 optically isolated outputs
Type: opto-fet, dry contacts.
Rating: 30VDC, 150 mA max.
Isolation2: Pulse outputs are isolated to 1500VDC from main board. RS485 port is
isolated to 1500VDC from the main board.
Power input, RS232, and analog/pulse inputs and are non-isolated.
Environmental Pollution Degree 2, altitude up to 2000m.
For indoor use.
Outdoor use requires appropriate enclosure.
The A8332 must be mounted inside a NEMA rated electrical enclosure for safety and isolation
requirements.
North America: Indoor, temperature -30oC - +70oC, 0 - 95% humidity, non-condensing3
EMC FCC CFR 47 Part 15, Class A
EN 61000, EN 61326
Size 4.13 in x 3.39 in x 1.18 in (105 mm x 86 mm x 30 mm)
Mass 3.7 oz (105 g)
1Inputs are intended for low voltage Class 2 or
equivalent outputs.
2If the product is used in a manner not specified by the
manufacture, the protection provided by the equipment may be
impaired.
3Power consumption listed does not include power consumed
by attached sensor devices. The combined current draw
requirements of all 8 input sensors should not exceed 200 mA.
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Devices manufactured before Feb 1, 2010 are rated to 0 - 50oc,
and are not UL recognized.
