Pioneer Industrial DVD Player DVD-V7400 - Manual (Page 10)

Computer Control
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2.3.2 External Switch Control (see Chapter 9)
Control the player with the External Option Switches (SW#).
Please check the condition of the Key Lock. If the Key Lock is set
(active), the player ignores the control. Please refer to the Key Lock
command description.
2.3.3 External Power Control
Control the player’s power with the Power Pin within the Interface
Connector.
If the player detects a high signal throughput (100m/sec or more)
during the Standby mode, the player powers ON. If the player
detects the same signal during the Power ON mode, the player
powers OFF and switches to the Standby mode.
The specifications for the Power pin are as follows:
Maximum Input Voltage Less Than m 12V
High Level Signal More Than 4.5V
Low Level Signal Less Than 0.5V
Standby mode
more than
100 msec
Power ON
Power ON mode
more than
100 msec
Power OFF
Check the Key Lock condition. If the Key Lock mode is active, the
player ignores the control (refer to the Key Lock command
description).