12
4.7.2 Analog Alarms
The NetGuardian's two analog inputs measure ranges of voltage or current inputs and can be used to measure
battery voltage, charging current, temperature, or other continuously variable conditions. The measurement range
of the analog channels is –90 to +90 VDC or 4 to 20 mA.
Note
: Default configuration is voltage.
Connect analog inputs 1-2 to the 4-pin connector labeled "Analogs."
4.7.2.1
Jumper Options
Fig. 4.12
Adjustable jumpers on the NetGuardian 216 circuit board
You can change the settings for analog alarm inputs by resetting the jumpers on the NetGuardian's circuit board.
To open the unit and expose the circuit board, remove the screws on the bottom and the screws on the sides of the
NetGuardian. Then slide the top cover off. Figure 4.12 shows the circuit board and the location of the adjustable
jumpers.
Fig. 4.13
Jumper settings for analog alarms inputs
By default, all the adjustable jumpers are open. For analog alarm input jumpers, the open position corresponds to
voltage input, and the closed position corresponds to current input — see Figure 4.13.