DPS Telecom D-PK-C16V2, Руководство пользователя

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Analog Alarms 5.8
The NetGuardian's analog alarm inputs measure continuous ranges of voltage or current. Analog alarms are typically
used to monitor battery voltage, charging current, temperature, humidity, wind speed, or other continuously
changing conditions. The measurement range of the analog channels is -90 to +90 VDC or 4 to 20 mA. To configure
the analogs for current sensing (4 - 20mA) please review the next section for jumper position.
You can use analogs 1 through 4 to monitor whatever you like. Analogs 5 and 6 are pre-configured to monitor
Battery A and B. Read the following table to see where to connect the analogs.
Analog # Connection
ANA 1 User-definable; connects to the 50-pin amphenol.
ANA 2 User-definable; connects to the 50-pin amphenol.
ANA 3 User-definable; connects to the 50-pin amphenol.
ANA 4 User-definable; connects to the 50-pin amphenol.
ANA 5 Pre-configured to monitor Battery A.
ANA 6 Pre-configured to monitor Battery B.
By default, the analog inputs are configured to measure voltage. You can switch the analog inputs to measure
current by resetting jumpers on the NetGuardian circuit board.
5.8.1 Switching Analog Alarms to Current Operation
Adjustable jumpers on the NetGuardian circuit board
By default, the analog inputs are configured to measure voltage. You can switch the analog inputs to
measure current by resetting jumpers on the NetGuardian's circuit board.
To test the analog alarm voltage/current jumpers, follow these steps:
1.
Make sure the NetGuardian is depowered and disconnected from all network connections.
2.
Remove the screws from the sides of the NetGuardian case.
3.
Slide the top cover of the case off to expose the circuit board.
4.
The adjustable jumpers are shown in. All alarm inputs can be individually configured for current or voltage
operation. Remember that the default jumper position is OPEN for measuring voltage.
Note: Each jumper
inserts a 250-ohm shunt resistor across the input. This must be taken into account when defining the
analog input reference scale.