The EdgeAccess Universal Chassis System
2361 Modem Users Manual
2-5
Operation:
Note: When connecting the alarm output to an external source, use twisted pairs and terminate
the cable shield at the user side.
2.4 Providing Power to the 2361 DC Modem
The -48 volt base unit is intended for use with an external -48VDC power supply. A two piece
terminal block connector is provided. It is clearly marked as to which screw lug is to be attached
to the positive (+) and negative (-) 48 volts DC terminals.
Note: Check signal ground (GND) of the source supply and orient it to the Modem GND, or
chassis ground. Verify with a ohmmeter that (+) and (-) are not shorted prior to applying power.
Figure 16. DC Power Entry Close-up
Warning! Turn off the -48VDC power supply to be completely sure that there is no more
power. Use a voltmeter to measure the voltage across the negative (-) and
positive (+) source DC leads. Set the voltmeter to a range that makes it
capable of measuring up to 75VDC. The measurement across the positive and
negative leads should be zero (0) volts
.
To provide power to the 2361 standalone modem DC version, do the following:
1.
Remove the power terminal block from the rear panel of the unit.
Summary of Contents for EdgeAccess Universal Chassis System 2361 T1
Page 1: ...2361 T1 Modem User Manual...
