User guide

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69
Pin Function In/Out
1 VCC (5V) -
2 SERVO A (Shaft posn channel A) I Analogue
3 SERVO B (Shaft posn channel B) I Analogue
4 TRIM A (Max posn set - channel A) I Analogue
5 TRIM B (Max posn set - channel B) I Analogue
6 Not Used (connect to ground) I Analogue
7 MAX SPEED (Max speed set - A & B) I Analogue
8 FERR (Following error set - A & B) I Analogue
9 STALL SPEED (Stall speed set - A & B) I Analogue
10 TRAP (Trapezium point set - A & B) I Analogue
11 VCC (5V) -
12 GND -
13 Osc1 (16MHz crystal) I
14 Osc2 (16MHz crystal) I
15 DIR A (Direction / Brake - channel A) O
16 PWM A (Speed - channel A) O
17 PWM B (Speed - channel B) O
18 DIR B (Direction / Brake - channel B) O
19 SERVO (set as, Servo=Lo, Speed=Hi) I
20 Good Rx (Lo= good DMX512 data) O
21 BAS0 (DMX base offset) I
22 BAS1 (DMX base offset) I
23 !DIR A (Direction / Brake - channel A) O
24 !DIR B (Direction / Brake - channel B) O
25 Not Used (connect to ground) I Analogue
26 DMX (TTL DMX receive) I
27 BCD Hundred 1 I
28 BCD Hundred 2 I
29 BCD Hundred 4 I
30 BCD Hundred 8 I
31 GND -
32 VCC (5V) -
33 BCD Unit 1 I
34 BCD Unit 2 I
35 BCD Unit 4 I
36 BCD Unit 8 (msb) I
37 BCD Ten 1 I
38 BCD Ten 2 I
39 BCD Ten 4 I
40 BCD Ten 8 (msb) I
Pin
Functions
Circuit
Operation
The AL4100 uses two consecutive channels of DMX data to position
two DC servo motors.
The DMX512 base address is set by the BCD thumbwheel switches.
Additional offset inputs BAS0, BAS1 allow up to four AL4100
processors to connect to the same thumbwheels with contiguous