Manual USB-IIRO-16 Family
6
Functional Description
FEATURES:
•
High-Speed USB 2.0 device, USB 1.1 compatible
•
16 optically isolated inputs
•
16 Form C electromechanical 1A relays
•
Internal, removable screw terminal board for easy wiring
•
Small (4" x 4"x 1.25") rugged industrial enclosure
•
Custom high-speed function driver
•
PC/104 module size and mounting compatibility
INPUTS
The board provides sixteen optically-isolated inputs. These inputs can accept either AC or DC signals and
are not polarity sensitive. Input signals are rectified by photocoupler diodes while unused power gets
dissipated through a 1.8k-ohm resistor in series. The inputs may be driven by either DC sources of 3 to 31
volts (rms) or AC sources at frequencies of 40 Hz to 10 KHz. Standard 12/24 AC control transformer outputs
can be accepted as well. External resistors connected in series may be used to extend the input voltage
range, however this will raise the input threshold range. Consult factory for available modified input ranges.
Each input circuit contains a switchable filter that has a 4.7 millisecond time constant. (Without filtering, the
response is less then 40 microseconds) The filter must be selected for AC inputs in order to eliminate the
on/off response to AC. The filter is also valuable for use with slow DC input signals in a noisy environment.
The filter may be switched out for DC inputs in order to obtain faster response. Filters are individually jumper
selected. Filters are switched into the circuit when jumpers are installed in position FLT0 to FLT15.
OUTPUTS
The board’s outputs are comprised of sixteen FORM C SPDT electro mechanical relays. These relays are all
de-energized at power-on.
Please note that once your hardware is properly installed in your system
you will likely want to run one of our sample programs to exercise the I/O. When doing so, as soon
as the sample program is run it will turn on all the relays and leave them in that state until you turn
them all off within the sample.
SCREW TERMINAL ACCESSORY BOARD
A Screw Terminal Accessory board is included with the unit, except for the Economy (E) and OEM versions.
The board provides access to all 80 I/O signals via removable screw terminals. Each removable screw
terminal carries 8 I/O signals, signal names are clearly marked on the accessory board's silk screen. The
screw terminal board plugs directly onto the I/O board while fitting inside the rugged industrial enclosure.
USB CONNECTORS
The primary USB connector is a Type B connector and mates with the cable provided. The USB port
provides communication signals along with +5 VDC power. The board can be powered from the USB port or,
if needed for higher current applications, an external power supply can be used. Selection of power source
is accomplished via a hardware jumper setting. A secondary USB connector (P4) is available to use instead
of the Type B which is an embedded mini 5-pin connector that is in parallel with and next to the primary
connector.
