FEATURES
Universal PCI, PCI-X, 3.3V and 5V compatible
Eight or sixteen optically isolated, non-polarized digital inputs
Eight or sixteen electro-mechanical relay outputs
Opto-isolated channel to channel and channel to ground
Can detect input state change and assert interrupt
Automatically detected under Windows 9x/NT/2000
FUNCTIONAL
DESCRIPTION
The PCI-IIRO-8 and PCI-IIRO-16
are low-cost, half-size cards that provide isolated input and
output for PCI-Bus computers. The cards have eight or sixteen optically-isolated
digital inputs for AC or DC control signals and eight or sixteen electro-mechanical
relay outputs. PCI-IIRO-8 occupies four consecutive eight-bit
registers in I/O space. PCI-IIRO-16 occupies eight consecutive eight-bit
registers in I/O space.
Inputs
The isolated
inputs can be driven by either AC or DC and are not polarity sensitive.
Input signals are rectified by a diode bridge and applied to the
inputs of opto-isolators. A 470 ohm resistor in series provides current
limiting. Standard 12/24 AC control transmitter outputs can be
accepted as well as DC voltages. The input voltage range is 5V
to 24V (rms). To extend the input voltage range, you may connect
external resistors in series.
Each input
circuit contains a switchable slow/fast filter that has a 10
millisecond (PCI-IIRO-8) or 5 millisecond (PCI-IIRO-16) time constant.
(Without filtering, the response is 20 microseconds.) 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. For the PCI-IIRO-16 the filters are globally
controlled by software. For the PCI-IIRO-8 the filters can also be individually
selected by switches on the card.
Interrupts
Interrupts
are enabled/disabled by software. When the change-of-state detection
circuit is enabled, the card asserts an interrupt whenever one
or more of the interrupts changes 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 electro-mechanical
relay outputs of the PCI-IIRO-8 are comprised of five form C SPDT outputs and three
Form A SPST (normally-open) type. The outputs of the PCI-IIRO-16 are divided into
two groups of eight, each group being similar to the PCI-IIRO-8. The relays are all
de-energized at power-on. Data to the relays is latched.
Connections
For the PCI-IIRO-8, I/O is
accessed via a 37 pin DBF connector on the mounting bracket of the card.
For the PCI-IIRO-16, 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.
Digital
Inputs
- Number
of inputs: 8 (PCI-IIRO-8) or 16 (PCI-IIRO-16)
- Type:
Non-polarized, optically isolated from each other and
from the computer. (not TTL/CMOS compatible)
- Voltage
Range: 5 to 24V DC or AC (50 to 1000 Hz)
- Isolation:
500V*(see manual) channel to channel and channel to ground
- Input
Resistance: 470 ohms in series with two diodes and an
LED
- Response
Time: 10 mSec w/filter, 20 uSec w/o filter
Relay
Outputs
- Number
of outputs: 8 (PCI-IIRO-8) or 16 (PCI-IIRO-16)
- Contact
Rating: 2A carry current, bifurcated, gold clad, silver
palladium
- Contact
Arrangement: Channels 0-4 are SPDT Form C and channels
5-7 are SPST Form A. For PCI-IIRO-16, channels 8-12 are SPDT Form C and channels
13-15 are SPST Form A
- Contact
Rating: Initial 100 milliohms maximum
- Contact
Life: mech'l: 5 million operations minimum; elect'l: 5
million operations minimum at full load
- Operating
Time: 2 milliseconds maximum
- Release
Time: 1 milliseconds maximum
- Regulatory
Approvals: UL and CSA
Interrupts
When
enabled by software, interrupts are generated when digital
inputs change state.
Power
Required
+5VDC
@ 0.675 A (all relays ON) for PCI-IIRO-8, or @ 0.750 A (all relays ON) for PCI-IIRO-16
Environmental
- Ambient
Temperature: Operating: 0 to +70° C
- Storage:
-20 to +70o C
- Humidity:
0 to 90 percent (non-condensing)
- Weight:
Approx. 8 oz. (227 grams) for PCI-IIRO-8, approx. 12 oz. (340 grams) for PCI-IIRO-16
- Size:
PCI-IIRO-8 is 6.15" (156 mm) long, PCI-IIRO-16 is 6.8" (173mm) long
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