StarDot Express Video Server, Руководство пользователя

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Express Video Servers Page 37
good for 100,000 cycles at maximum load, 100 million when unloaded.
The relay is rated for 0.5A @ 125VAC; however it should never be
used to directly control AC voltages from the wall outlet. It will wear
out rapidly and may result in sparking with risk of fire. Switching
mechanisms designed for controlling wall outlet power, which can be
triggered from a low DC voltage, are available.
Express 4/8
1 Relay 1-A
2 Relay 1-B
3 Trigger Input 1 (+5V pull-up)
4 Trigger Input 2 (+5V pull-up)
5 Trigger Input 3 (+/- 64V OK)
6, 7 Future Use
8 Ground (“Common” for Trigger Inputs)
The Express 4 and 8 I/O connector contains three non-isolated
trigger inputs and one relay connection.
Pins 3 and 4 are trigger inputs 1 and 2, both of which have a 5v
pull-up. Trigger input 1 and 2’s pull- ups can be shorted to the ground
pin (also present on the connector) to provide a second state. A normal
operation might be a magnetic switch on a window or door which is
normally closed, and which is broken when the door is opened, giving
the trigger signal.
Pin 5 is a diode-clamped trigger which can -64V as its input,
with negative voltages generating an internal “0” condition, and anything
over +3V generating a “1” condition.
Pins 1 and 2 are the relay, which can handle 2A @ 28VDC. It is
good for 100,000 cycles at maximum load, 100 million when unloaded.
The relay is rated for 0.5A @ 125VAC; however it should never be
used to directly control AC voltages from the wall outlet. It will wear
out rapidly and may result in sparking with risk of fire. Switching
mechanisms designed for controlling wall outlet power, which can be
triggered from a low DC voltage, are available.