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PCM-UIO48A-G Datasheet Preview

PCM-UIO48A-G Datasheet

Universal 48-Point I/O

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PC/104 MODULE
PCM-UIO48A-G
Universal 48-Point I/O
with Interruptible Event Sense
FEATURES
Supports 48 digital I/O lines
Each line is capable of:
• Bidirectional operation
• Input, Output or Output with Read back
• 12mA Sink Current
Generates an interrupt on signal change-of-state:
• Supports 24 event sense lines
• Software selectable edge polarity for each line
• Software enabled interrupt for each line
• Change-of-state latched for each line
Write-protection mask register for each 8-bit port
Compatible with industry standard I/O racks
Fused +5V logic supply for I/O modules
8- or 16-bit PC/104 interface
+5 volt only operation
RoHS compliant product
Extended temperature range: -40oC to +85oC
The PCM-UIO48A-G is a highly-versatile PC/104 input/
output module providing 48 lines of digital I/O. The major
feature of this card is its ability to monitor 24 lines for both
rising and falling digital edge transitions, latch them and
then interrupt the host processor notifying that a change-
of-input status has occurred. This is an efficient way of sig-
naling the CPU of real-time events without the burden of
polling the digital I/O points.
This PC/104 module is also compatible with industry
standard isolated I/O signal conditioning modules from
Opto-22, Gordos, and others. This module is RoHS-
compliant.
FUNCTIONAL CAPABILITY
PC/104 Interface - The PCM-UIO48A-G is a PC/104
compatible stackthrough card which is I/O port mapped on
any even 16-byte boundary.
Parallel I/O Controller - WinSystems has designed
a WS16C48 Universal I/O controller ASIC to support
the various input/output and interrupt configurations. The
WS16C48 supports 48 digital I/O lines addressed through
six contiguous registers. A six-bit Write Mask register
allows the user to disable Writes on a byte basis to config-
ure the group as a “Read Only” port.
Each I/O line is individually programmable for input, out-
put, or output with Read back operation. The input lines are
connected so the current status of its output port can be
read from the corresponding input port (Read back).
Pictured: PCM-UIO48A-G-16
If the port is used as input only, then the corresponding
output port bit must be cleared. Each output channel is
latched and has an open collector driver (with a pull-up
resistor) capable of sinking 12mA of current. This allows
direct control of up to 48 opto-isolated signal conditioning
modules to a single card for high density I/O support.
Event Sense Operation - Each WS16C48 ASIC supports
24 event sense lines to generate an interrupt when an event
occurs. This means that 24 lines of the PCM-UIO48A-G
can sense a positive or negative transition on the input.
Transition polarity is programmable and enabled on a bit-
by-bit basis. Each lines’ transition is latched by the event
so that even short duration pulses will be recognized. An
interrupt ID register is maintained for each line for writing
more efficient Interrupt Service Routines.
Interrupts - The PCM-UIO48A-G can generate a system
interrupt request which can be routed via jumper to IRQ
channels 2 - 7 on the 8-bit or the additional five interrupt
channel inputs on the 16-bit version.
I/O Connectors - The signals from the WS16C48
are wired to two 50-pin connectors, J1 and J2. Each
connector supports 24 data lines which are alternated
with 24 ground lines for reduced noise and crosstalk.
Also, each connector has a 1A fuse on the +5 volt source
to supply logic power for I/O module rack.




WinSystems

PCM-UIO48A-G Datasheet Preview

PCM-UIO48A-G Datasheet

Universal 48-Point I/O

No Preview Available !

The PCM-UIO48A-G’s pinout is compatible with the
industry standard 4 to 24 position I/O module mounting
racks (Opto-22, Crydom, Gordos, etc.). The racks accept
AC and DC modules which optically isolate the computer
from electrical transients and excessive voltages from the
field devices.
Four foot, 50 conductor ribbon cables such as the
WinSystems’ CBL-115-4 and CBL-129-4 connects
the PCM-UIO48A-G to one I/O rack. Two cables are
required to fully utilize this card, one for each rack. The
cable will interface directly to a 4, 8, 16 or 24 module rack.
RoHS Compliant - This product is designed to meet the
Directive on the Restriction of the use of certain Hazardous
Substances in electrical and electronic equipment (RoHS)
European Union directive 2002/95/EC.
SPECIFICATIONS
Electrical
PC/104 Bus: 8- or 16-bit stackthrough
Parallel Interface:48 I/O lines, TTL compatible
PCM-UIO48A-G BLOCK DIAGRAM
Pin Description
1 IO23
3 IO22
5 IO21
7 IO20
9 IO19
11 IO18
13 IO17
15 IO16
17 IO15
19 IO14
21 IO13
23 IO12
25 IO11
27 IO10
29 IO9
31 IO8
33 IO7
35 IO6
37 IO5
39 IO4
41 IO3
43 IO2
45 IO1
47 IO0
49 +5V
Pin Description
2 Ground
4 Ground
6 Ground
8 Ground
10 Ground
12 Ground
14 Ground
16 Ground
18 Ground
20 Ground
22 Ground
24 Ground
26 Ground
28 Ground
30 Ground
32 Ground
34 Ground
36 Ground
38 Ground
40 Ground
42 Ground
44 Ground
46 Ground
48 Ground
50 Ground
J1 and J2 - Rack I/O Connector Pin-Out
Power Requirements
Vcc = +5V ±5% at 12mA (excluding rack power
with no loads on the outputs)
Mechanical
Dimensions:
3.6” x 3.8” (90mm x 96mm)
Connectors
Digital I/O:
Jumpers:
J1 - J2, 50-pin dual 0.100” grid
0.025” square posts
Environmental
Operating Temperature: -40oC to +85oC
ORDERING INFORMATION
PCM-UIO48A-G-8
PCM-UIO48A-G-16
CBL-115-4
CBL-129-4
48 channel Universal I/O module
with 8-bit PC/104 interface
16-bit PC/104 interface version
4-ft. ribbon to Opto module rack,
50-pin socket on one end and edge
termination on the other,
non-RoHS compliant product
4-ft. ribbon cable, 50-pin. Both ends
have a socket termination,
non-RoHS compliant product
WinSystems reserves the right to make changes to products
and/or documentation without further notification.
Product names of other companies may be trademarks of their
respective companies.
715 Stadium Drive • Arlington, Texas 76011 • (817) 274-7553 • http://www.WinSystems.com


Part Number PCM-UIO48A-G
Description Universal 48-Point I/O
Maker WinSystems
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