Alarm Inputs - Sony SNT-V304 User Manual

Alarm Inputs

Four photocoupler inputs are provided for alarm
inputs. Alarm signals can be connected to any of the
inputs as follows.
To use the electrically isolated inputs, the connected
device must have 5 to 20-V DC output, connected as
follows.
Inside server← →Outside server
Approx. 4.7 kΩ
Pins 3, 5, 11 and 13 +
Pins 4, 6, 12 and 14 –
Max. 24V AC/DC
@100 mA
If an alarm device has mechanically switched or open-
collector outputs that do not need to be electrically
isolated, connect as follows.
Inside server← →Outside server
Pin 9
Approx. 4.7 kΩ
Pins 3, 5, 11 and 13
Pins 4, 6, 12 and 14
Pin 10
Mechanically switched
output device
Alarm Device
5 to 20V DC Output
Pin 15
Pin 16
Mechanically
switched output
device
Note
Insert a protective diode when connecting a conductive
load, such as a relay, to alarm out pins 15 and 16.
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