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phone: 360.260.2468
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sales: 800.736.0194
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fax: 360.260.2469
email: sales@usdigital.com
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website: www.usdigital.com
11100 ne 34th circle
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vancouver, washington 98682 USA
PC2
Cable Driver for Incremental Encoders
Description:
Parameter
Min
Typ.
Max.
Units
Notes
Supply voltage (PWR)
4.5
-
5.5
Volts
Supply current (26LS31)
-
35
60
mA
Supply current (26C31)
-
1
2
mA
Output high voltage
2.5
-
-
Volts
I
OH
= 20 mA
Output low voltage
-
-
0.8
Volts
I
OL
= 20 mA
Propagation time
-
-
15
ns
Electrical Characteristics:
Pin
Name
Description
1
GND
Ground.
2
GND
Connected to pin 1.
3
I-
Differential index lines.
4
I+
5
A-
Differential A channel.
6
A+
7
+5
+5 VDC power supply.
8
+5
Connected to pin 7.
9
B-
Differential B channel.
10
B+
Pinout:
PC2
shown mounted on an E2 encoder
The TTL outputs of our incremental encoders can sink (pull down) less than 4mA and
source (pull up) less than 200uA. This is not always adequate. For long cables (6 to
1000 feet) or noisy environments, one of these tiny plug-in driver boards will provide
additional drive. They are so small, they fit between the two wire loops on either side
of the 5-pins of the encoder as shown in the drawings to the right.
The PC2 is our first generation RS-422 cable driver board designed to attach to our
incremental encoders. The PC2 is available for our customers who have designed
it into their products. However, the PC4 is highly recommended in place of the PC2.
Parameter
Min.
Max.
Units
Storage temperature
-40
100
C
Operating temperature
-40
100
C
Absolute Maximum Ratings:
Note: For implementations with long cables the supply voltage at the host should
be appropriately higher to compensate for voltage losses in the wires. Consider the
power requirement of the encoder, the PC2 module and the optional termination
resistors.
Ordering Information:
Technical Data, Rev. 08.23.00, August 2000
All Information subject to change without notice.
Price:
$13.00 / 1
$12.00 / 100
$11.00 / 500
$10.50 / 1K
PC2 -
1 = No connector.
A = 26LS31 driver instead of 26C31.
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