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Chapter 7 Plug-in Modules
N2263A 32-bit Digital I/O Module
4
7
N2263A Simplified Schematic
The N2263A consists of 32 bidirectional I/O channels, each of which
includes digital in and digital out circuits as shown in the simplified
schematic below. Each input has its own pull-up resistor, allowing easy
detection of external termination (grounded or open-circuited) status.
Each output driver is capable of sinking an externally-supplied current
up to 600 mA, making it possible to control relays without the need for
additional driver circuitry.
PFLG Handshake Signal
OPEN COLLECTOR/
TERMINAL
CONNECTION
BLOCK
ONE I/O LINE
PCTL or I/O
Handshake Signal
CURRENT SINK
(VMOS FET)
DRIVER OUTPUT
INPUT SENSE
REFERENCE
VOLTAGE
10K
+5V
10K
60V
+5V +5V
Resetable fuse
215
TERMINAL
CONNECTION
BLOCK
10K
+5V +5V
Resetable fuse
215
TERMINAL
CONNECTION
BLOCK
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