bmcm LAN-AD16f, Manual

LAN-AD16f 

2.4

Digital channels and counter 

The LAN-AD16f features 16 digital inputs and outputs each (

low

: 0V..0.7V; 

high

: 3.0V..5V). The digital 

lines are hard-wired. A 19-bit counter (quadrature decoder) is additionally integrated allowing the connection 
of an incremental encoder. The counter or incremental encoder and the external counter reset, if required, are 
attached to the first digital input lines.  

All lines are led to the 37-pin D-Sub female connector at the device front. The pin assignment is as follows: 

Pin 

LAN-AD16f   

Pin 

LAN-AD16f  Counter 

1 DOut 

1 

11 

DIn 1 

Signal A 

20 DOut 

2 

30 DIn 

2 Signal 

B 

2 DOut 

3 

12 DIn 

3  Reset 

21 DOut 

4 

31 DIn 

4 

3 DOut 

5 

13 DIn 

5 

22 DOut 

6 

32 DIn 

6 

4 DOut 

7 

14 DIn 

7 

23 DOut 

8 

33 DIn 

8 

5 DOut 

9 

15 DIn 

9 

24 DOut 

10 

34 DIn 

10   

6 DOut 

11 

16 DIn 

11   

25 DOut 

12 

35 DIn 

12   

7 DOut 

13 

17 DIn 

13   

26 DOut 

14 

36 DIn 

14   

8 DOut 

15 

18 DIn 

15   

27 DOut 

16 

37 DIn 

16   

9, 28  5V, max. 50mA 

10, 19, 29 

DGND 

The digital inputs and outputs are protected by serial resistors. Input voltages beyond the permitted 
voltage range of 0V..5V can damage the device. 

The counter of the LAN-AD16f counts the num-
ber of incoming pulses (max. 8MHz) sampled at 
the connection of signal A. If the maximum 
counting range is reached, the counter will be re-
set to the minimum value of the counting range.  

If the external counter reset is connected, the 
counter can be reset at any time. 

In comparison to a counter, the quadrature de-
coder considers the counting direction by decoding a second phase-shifted signal. 

To activate the counting function, the respective digital lines of the LAN-AD16f must be programmed to 
counter operation via software. 

Function 

Description  Max. pulse frequ. 

Connection 

Dig. pins used  Counting range 

Counter count 

Ç

 8MHz 

Signal 

A 

1 

0..2

19

-1 

Up/Down counter 

count 

ÇÈ

8MHz 

Signal A, Signal B 

2 

2

18

 .. 2

18

-1 

Incremental encoder 

count 

ÇÈ

2MHz 

Signal A, Signal B 

2 

2

18

 .. 2

18

-1 

Please see the manufacturer's documentation for details about connecting your incremental encoder. 

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