Alcorn Mcbride V+ series, User Manual

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SMPTE Machine Hardware Reference 14-7
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Digital Inputs
The SMPTE Machine includes 3 front panel buttons and 8 Opto-isolated inputs
that control the unit’s behavior. The buttons start, pause and reset the SMPTE
timecode. The Opto-isolated inputs are activated by electrically activating the
input through the Parallel I/O connector located on the rear panel.
The connections for the Parallel I/O connector are as follows:
Pin Connection Pin Connection
1
“Start” Voltage Input
20
“Start” Voltage Input Return
2
“Pause” Voltage Input
21
“Pause” Voltage Input Return
3
“Reset” Voltage Input
22
“Reset” Voltage Input Return
4 Not Used 23 Not Used
5
“Idle” Voltage Input
24
“Idle” Voltage Input 12 Return
6 Not Used 25 Not Used
7 Not Used 26 Not Used
8 Not Used 27 Not Used
9
“Running” Output
28
“Start” Contact Closure Input
10
“Fault” Output
29
“Pause” Contact Closure Input
11
“Ready” Output
30
“Reset” Contact Closure Input
12 Not Used 31 Not Used
13 Not Used 32
“Idle” Contact Closure Input
14 Not Used 33 Not Used
15 Not Used 34 Not Used
16 Not Used 35 Not Used
17 Clamping Diodes
36 GND
18 N/C 37 GND
19 GND
Table 10 – Parallel I/O connector Inputs.
Two forms of input signal can be applied to the Parallel I/O connector: Voltage
Inputs, and contact closures. Voltage Inputs and contact closure inputs, while
activating the same input, are available on separate pins of the Parallel I/O
connector. We do not recommend using both types of input simultaneously.