PC/104 - USB Isolated I/O
Digital Specifications
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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
Receiver Sensitivity: ±200 mV differential input
Common Mode Voltage: +12V to -7V
Transmitter Output Drive: 60 mA with thermal shutdown
Termination: Jumper selectable per channel for RS-485 mode
Bias: On-board from factory on transmit lines for RS-485 & RS-422
Isolated Inputs
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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)
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
Filter Response Times: Rise Time = 4.7 mS / Fall Time = 4.7 mS
Non-Filter Response Times: Rise Time = 10 uS / Fall Time = 30 uS
Bus Type
USB 1.1 and 2.0 host compatible
*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.
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
Relay Outputs
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Number of outputs: 4 SPDT form C
Contact Type: Single crossbar; Ag with Au clad
Rated Load AC: 0.5 A at 125 VAC (62.5 VA max.)
Rated Load DC: 1A at 24 VDC (30 W max.)
Max. Switching Voltage: 125 VAC, 60 VDC
Max. Switching Current: 1 A
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.
Contact Resistance: 100 mO max.
Contact Life: mech'l: 5 million operations min.
Operating Time: 5 milliseconds max.
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
Regulatory Compliance
This product is designed to be in full compliance with CE require-
ments.
- Jumper selectable termination
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Serial Data Rates: Up to 230.4K bps, asynchronous for RS-232
Up to 921.6K bps, asynchronous for RS-422 & RS-485.
Ordering Information
Item Codes
Description
USB-IIRO4-2SM
USB-IIRO-4DB
USB-COM-2SM
Accessories
ADAP25-M
Enclosure and multifunction module
4 isolated digital inputs and 4 relay outputs only
2 Port USB to RS-232/422/485 serial adapter
DB25 connector external-mounted screw termination
board
MP104-DIN
Options
-OEM
DIN rail mounting provision
Board Only version (no enclosure)
Advanced Digital Logic, Inc.; 4411 Morena Blvd., Suite 101; San Diego, CA 92117-4345
Ph. 858 490-0597 F. 858 490-0599; e-mail: sales@adl-usa.com; web: www.adl-usa.com
ADL [ ADVANCED DIGITAL LOGIC, INC. ]
