Alcorn Mcbride V+ series, User Manual

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SMPTE Machine Hardware Reference 14-11
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Digital Outputs
Output Connector
In addition to discrete inputs, the SMPTE Machine provides transistor outputs
(lamp drivers) that indicate the unit’s state. These outputs are capable of sinking
up to 500 mA each.
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 13 – Parallel I/O connector Outputs
Note
When the outputs are used to drive inductive loads (relay coils, etc.), pin
17 can be connected to the powered side of the load to provide additional
snubber diode protection.