Service manual

Record Tally (Opto-isolated Reader Inputs)

Location: Rear of Recorder Interface Unit

Mating connector required: 50-way D type male

Tallies must be connected via a resistor of appropriate value to limit current to less than

10mA, e.g. if tally signal from machine is active high 5V it would be connected to the + PIN

via a 470 ohm resistor. Typical connection schemes:

1-24

25-48

PIN PIN PIN PIN

Record Tally 1 2 3 Record Tally 25 2 3

Record Tally 2 4 5 Record Tally 26 4 5

Record Tally 3 6 7 Record Tally 27 6 7

Record Tally 4 8 9 Record Tally 28 8 9

Record Tally 5 10 11 Record Tally 29 10 11

Record Tally 6 12 13 Record Tally 30 12 13

Record Tally 7 14 15 Record Tally 31 14 15

Record Tally 8 16 17 Record Tally 32 16 17

Record Tally 9 18 19 Record Tally 33 18 19

Record Tally 10 20 21 Record Tally 34 20 21

Record Tally 11 22 23 Record Tally 35 22 23

Record Tally 12 24 25 Record Tally 36 24 25

Record Tally 13 26 27 Record Tally 37 26 27

Record Tally 14 28 29 Record Tally 38 28 29

Record Tally 15 30 31 Record Tally 39 30 31

Record Tally 16 32 33 Record Tally 40 32 33

Record Tally 17 34 35 Record Tally 41 34 35

Record Tally 18 36 37 Record Tally 42 36 37

Record Tally 19 38 39 Record Tally 43 38 39

Record Tally 20 40 41 Record Tally 44 40 41

Record Tally 21 42 43 Record Tally 45 42 43

Record Tally 22 44 45 Record Tally 46 44 45

Record Tally 23 46 47 Record Tally 47 46 47

Record Tally 24 48 49 Record Tally 48 48 49

Digital Service Manual

Issue 3 Page 57

Opto-isolated inputs

Rated at 10mA

VDC

R 10mA

28 VDC

2.7K ohms

5VDC

MAGNATECH

DUBBER

MULTITRACK