IDI-xx
Isolated Digital Input Card
FEATURES
|
| The
IDI-48AC fully-loaded with all options |
- Individually-isolated
digital inputs for up to three 16-bit groups
- Polarity-protected
input voltage amplitudes to 28V and 60V
- 60Vrms
Isolation, Channel-to-Channel and Channel-to-Host PC
- On-card
shields prevent accidental contact with user voltages
- Some
models can generate interrupts when input bits change
state.
- Output
connectors via on-card ribbon-cable headers
- Lower
cost per point than externally-racked solid-state relay
modules
FUNCTIONAL
DESCRIPTION
IDI-xx
Series cards provide individual-input optical isolation and
accept as many as 48 parallel, differential digital inputs
at voltages up to 60 VDC. Protection circuits are included
in case of accidental polarity reversal of input connections.
These cards provide a much lower cost per point than externally-mounted,
optically-isolated, solid-state modules or PLC's. Input connections
are via ribbon-cable headers on the cards and a tie-down bar
is included to provide strain relief for those cables. IDI-Series
cards are especially useful in applications where high common
mode external voltages are present as found in factory automation,
energy management, security systems, and process monitoring
applications. In addition to protecting your computer from
accidental contact with high external voltages, this isolation
eliminates troublesome ground loops.
If
your installation will be in an electrically noisy area, then
you may want to consider using a protective jacket on the
ribbon cables. We optionally offer "Zippertubing"
shielded protective jackets. (These are referred to as ZTR-xx
on our price list.) The jacket uses 10-mil. high temperature
PVC material laminated to a 1-mil. shield of aluminum foil/polyester
and groundable through a tinned copper braid.
48-Bit,
32-Bit, and 16-Bit versions are available. The latter two models
are de-populated versions of the 48-bit card. Further, letters
are appended to the model numbers to signify options included
in the card. (See table)
| Model |
Number of Bits |
Maximum Input Voltage |
Change of State Interrupt
Capability |
| IDI-16A |
16 |
28 V |
No |
| IDI-16AC |
16 |
28 V |
Yes |
| IDI-16B |
16 |
60 V |
No |
| IDI-16BC |
16 |
60 V |
Yes |
| IDI-32A |
32 |
28 V |
No |
| IDI-32AC |
32 |
28 V |
Yes |
| IDI-32B |
32 |
60 V |
No |
| IDI-32BC |
32 |
60 V |
Yes |
| IDI-48A |
48 |
28 V |
No |
| IDI-48AC |
48 |
28 V |
Yes |
| IDI-48B |
48 |
60 V |
No |
| IDI-48BC |
48 |
60 V |
Yes |
Optional
change-of-state detection capability provides means to automatically
interrupt the host computer in real time. When activated,
latched interrupt requests can be generated when one or more
bits change state. That interrupt, in turn, can be used by
your application program to poll the inputs, then signal an
alarm, and/or initiate scan of other I/O points that have
not been previously activated. This can greatly simplify your
application program and eliminate need for the application
program to continuously poll inputs. Interrupts IRQ 2 through
7, 10-12, and 14-15 can be selected by jumper installation
on the card. An on-board microcontroller on "C"-version
cards provides capability for a variety of modes of operation
as follows:
- Channels
0-15 active only.
- Channels
16-31 active.
- Channels
32-47 active.
- Change-of-state
interrupt active on channels 0-15.
- Change-of-state
interrupt active on channels 16-31.
- Change-of-state
interrupt active on channels 32-47.
- Periodic
scan of all active input channels.
That
last operation mode can occur concurrently with Change-of-State
operations. It makes use of an on-board crystal oscillator
and a microcontroller and provides means to verify proper
system operation, on a timed basis. This is useful in situations
where there has not been any bit state changes for an extended
period of time and you wish to confirm that the system is
still operating properly.
SPECIFICATIONS
Digital
Inputs
- Logic
0: Open or 1.5VDC maximum
- Logic
1: 28V Models: 3.5V min. at 0.6 mA, 28V max. at 13 mA
60V Models: 2.4V min. at 2.0 mA, 60V max. at 2.3 mA.
- Frequency
Response:
- 28V Models: Up to 5 KHz
- 60V Models: Up to 10 KHz
- Isolation:
60 Vrms channel-to-channel and channel-to-computer.
(Note: Alternate wires in the ribbon cables are not
connected at the card, thus providing bit- to-bit isolation
higher than that normally provided by ribbon cables.)
Environmental
- Operating
Temperature: 0 to +60 degree C.
- Storage
Temperature: -20 to +100 degree C.
- Humidity:
0% to 90% non-condensing.
- Size:
13.310 inches. Install in a full-size slot.
Power
Requirements
- +5
VDC at 300 mA typical for fully populated 48 bit card
Regulatory
Compliance 
Declaration of Conformity, and Test Reports are on file. Users
must use appropriate shielded cables.
| Part
Number |
Price(USD)
|
| IDI-16A |
149.00
|
| IDI-16AC |
189.00
|
| IDI-16B |
174.00
|
| IDI-16BC |
214.00
|
| IDI-32A |
249.00
|
| IDI-32AC |
299.00
|
| IDI-32B |
299.00
|
| IDI-32BC |
349.00
|
| IDI-48A |
349.00
|
| IDI-48AC |
419.00
|
| IDI-48B |
424.00
|
| IDI-48BC |
494.00
|
View / Download Manual (in .PDF
format)
