PC/104 - USB Isolated I/O

Advanced Digital Logic, Inc.; 4411 Morena Blvd., Suite 101; San Diego, CA 92117-4345

Isolated Inputs

•

Number of inputs: 4

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Type: Non-polarized, optically isolated from each other and from

the computer (CMOS compatible)

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Voltage Range: 3 to 31 DC or AC Rms (40 to 10000 Hz)

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Isolation: 500V*(see note) channel-to-ground or channel-to chan-

nel

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Input Resistance: 1.8K ohms in series with opto coupler

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Filter Response Times: Rise Time = 4.7 mS / Fall Time = 4.7 mS

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Non-Filter Response Times: Rise Time = 10 uS / Fall Time = 30 uS

*Notes on Isolation: Opto-Isolators and connectors are rated for at

least 500V, but isolation voltage breakdowns will vary and is affected

by factors like cabling, spacing of pins, spacing between traces on the

PCB, humidity, dust and other environmental factors. This is a safety

issue so a careful approach is required. For CE certification, isolation

was specified at 40V AC and 60V DC. The design intention was to

eliminate the influence of common mode. Use proper wiring tech-

niques to minimize voltage between channels and to ground. For

example, when working with AC voltages do not connect the hot side

of the line to an input. Tolerance of higher isolation voltage can be

obtained on request by applying a conformal coating to the board.

Relay Outputs

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Number of outputs: 4 SPDT form C

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Contact Type: Single crossbar; Ag with Au clad

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Rated Load AC: 0.5 A at 125 VAC (62.5 VA max.)

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Rated Load DC: 1A at 24 VDC (30 W max.)

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Max. Switching Voltage: 125 VAC, 60 VDC

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Max. Switching Current: 1 A

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Contact Resistance: 100 mO max.

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Contact Life: mech'l: 5 million operations min.

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Operating Time: 5 milliseconds max.

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Release Time: 5 milliseconds max.

Communications Interface

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I/O Connections: There are 9 pins per port including common

grounds. All RS-232 signals are supported and present at the DB9

connectors.

- RS-422 data signals – Tx+, Tx-, Rx+, Rx-, GND

- RS-485 data signals – 2 wire: Tx/Rx+, Tx/Rx-, GND

- 4 wire: Tx+, Tx-, Rx+, Rx-, GND

- Jumper selectable termination

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Serial Data Rates: Up to 230.4K bps, asynchronous for RS-232

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Up to 921.6K bps, asynchronous for RS-422 & RS-485.

Ordering Information

Item Codes

Description

USB-IIRO4-2SM

Enclosure and multifunction module

USB-IIRO-4DB

4 isolated digital inputs and 4 relay outputs only

USB-COM-2SM

2 Port USB to RS-232/422/485 serial adapter

Accessories

ADAP25-M

DB25 connector external-mounted screw termination

board

MP104-DIN

DIN rail mounting provision

Options

-OEM

Board Only version (no enclosure)

Digital Specifications

•

Multidrop: Compatible with RS-485 specifications. Up to 32 drivers

and receivers allowed on line. Driver / Receivers used are type

SP491.

•

Character Length, Parity and Stop Interval: 5,6,7, or 8 bits; Even,

odd, or none; 1, 1.5, or 2 bits

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Receiver Sensitivity: ±200 mV differential input

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Common Mode Voltage: +12V to -7V

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Transmitter Output Drive: 60 mA with thermal shutdown

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Termination: Jumper selectable per channel for RS-485 mode

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Bias: On-board from factory on transmit lines for RS-485 & RS-422

Bus Type

USB 1.1 and 2.0 host compatible

Power Required

5V@ 120mA Quiescent, 320mA maximum

20mA for each activated relay(80 max)

0-60mA for each COM channel

+5VDC provided via USB cable up to 500mA

Environmental

Operating Temperature Range: 0°C. to +60°C.

Storage temperature Range: -50°C. to +120°C.

Humidity: 5% to 95%, non-condensing.

Size: 4 inches wide by 4 inches deep by 1.8 inches high

Extra USB connections

This board has two optional USB onboard five pin connectors. One

connector allows you the added feature of connecting to a spare USB

port on the onboard USB1.1 hub. This would provide an additional,

'daisy-chained' USB 1.1 bus to which you can attach an additional

ACCES I/O USB product or any 3rd party USB devices you may wish.

Up to 180mA is still available without requiring the added device to

have its own 5VDC power source. The second five pin connector

allows the board to have an onboard USB connection rather than the

standard type B connector that is accessible externally on the enclo-

sure. This is useful in OEM embedded or high vibration applications

where a tighter fit USB connection is required than a standard USB

plug.

Regulatory Compliance

This product is designed to be in full compliance with CE require-

ments.