PCI-IDIO-16
Isolated Digital Input/Output Card
FEATURES
-
Call
for PCI-X, 3.3V Compatibility
- Sixteen
optically-isolated, non-polarized digital inputs
- 60
V isolation
- Sixteen
fully protected FET outputs
- Can
detect input state change and assert interrupt
- No
switches or jumpers to set, all options software selectable
Functional Description
The PCI-IDIO-16 is a low-cost, 6.8" card that provides isolated
input and output for PCI-bus computers. The card has sixteen
optically-isolated digital inputs for AC or DC control signals
and sixteen isolated FET outputs. For safety reasons in working
with AC voltages, insulating shields are provided with each
card.
Inputs
The isolated inputs can be driven by either AC or DC signals
and are not polarity sensitive. Input signals are rectified
by a diode bridge and applied to a transistor circuit that
provides constant current drive to the opto-isolator independent
of the amplitude on the input. Input voltages of 2.5-50VDC
or AC voltages of 2V- 36Vrms can be accepted. Inputs have
a 0.2V hysteresis.
Each input circuit contains a software switchable slow/fast
filter that has a 5 millisecond time constant. The filter
must be selected for AC inputs in order to eliminate response
to zero crossings. 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 globally switched on or off in one group of 16
inputs.
Interrupts
Interrupts are enabled/disabled by software. When the change-of-state
detection circuit is enabled, the card asserts an interrupt
whenever any of the sixteen inputs change state. Once an interrupt
has been generated and serviced, it must be cleared by system
software. This feature greatly frees up system resources by
eliminating the need for constant polling to see when an input
has changed state.
Outputs
The FET outputs are comprised of two groups of four completely
isolated outputs and four outputs that share a common return.
The outputs are all off at power-on. Data to the outputs is
latched. Capable of 1A carry current at up to 50VDC. FETs
are fully protected against short circuit, over-temperature,
ESD damage, and have active clamping above 50VDC.
Connections
The I/O is accessed via a 78 pin DBF connector on the
mounting bracket of the card. A molded breakout cable (model
CAB78-37/2) is optionally available that divides the 78
pins into two DB37F connectors. Also available is a kit
(model STB-37/2 Kit) which includes the cable and two STB-37
Screw Terminal Cards that mount into an included one-foot
length of Snap-Trak.
SPECIFICATIONS
Digital
Inputs
- Number
of inputs: 16.
- Type:
Non-polarized, optically isolated from each other
and from the computer.
- Input
voltage range: 2.5 to 50V DC or 2-36VrmsAC (50 to
10000 Hz) with 0.2V hysteresis.
- Isolation:
60V.
- Input
Resistance: The opto-isolator diode current is constant
at 4 mA typically regardless of input voltage.
- Interrupts:
When enabled by software, interrupts are generated
when digital inputs change state.
- Response
Time: 5 mSec w/ filter.
Protected
FET Outputs
- Number
of outputs: Sixteen. In two groups of 8 channels each.
In each group 4 channels are totally isolated and
4 channels have a common ground.
- Output
Type: High Side Power MOS FET Switch. Protected against
short circuit, over temperature, ESD, capable of driving
inductive loads.
- Compliance
Voltage: 5-50DC Volts (customer supplied).
- Current:
1A.
- Turn-on
time: Rise time: 50usec. Turn-on delay: 50usec.
- Turn-off
time: Fall time: 50usec. Turn-off delay: 50usec.
- Interrupts:
When enabled by software, interrupts are generated
when any digital input changes state (High to Low
or Low to High, and from signal to no signal or no
signal to signal with AC inputs).
- Power
Required: +5VDC at 0.250A.
Environmental
- Operating
Temperature: 0° to 70° C.
- Storage
Temperature: -40° to +85° C.
- Humidity:
5 to 95%, non-condensing.
- Weight:
Approx. 12 oz. (340 grams).
- Size:
6.8" long (173 mm).
Regulatory
Compliance 
Declaration of Conformity, and Test Reports are on file. Users
must use appropriate shielded cables.
| Part
Number |
Price(USD)
|
| PCI-IDIO-16 |
309.00
|
| CAB78-37/2 |
70.00
|
| STB-37/2
Kit |
159.00
|
View / Download Manual
(in .PDF format)
