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4.3 POWER CONNECTION
The Model 2094 offers three ways to supply external power: AC
power, DC power and interface power.
4.3.1 Using the AC Power Supply (100-240VAC)
The Model 2094 uses a 5VDC, 2A universal input 100-240VAC,
power supply (center pin is +5V). The universal input power supply is
equipped with a male IEC-320 power entry connector. This power sup-
ply connects to the Model 2094 by means of a barrel jack on the rear
panel. There are a variety of international power cords available for
the universal power supply. The Model 2094 powers up as soon as it
is plugged into an AC outlet–there is no power switch.
4.3.2 Supplying DC Power
The 36-60 VDC DC to DC adapter is supplied with the DC version
of the Model 2094. The black and red leads plug into a DC source
(nominal 48VDC) and the barrel power connector plugs into the barrel
power supply jack on the 2094.
4.3.3 Supplying Power via pin KK
You may also supply DC power directly to pin KK of the V.35 inter-
face. DC Power supplied to pin KK must be +5VDC ± 5%, 300mA
minimum.
NOTE: Model 2094 is factory configured to accept power from the
enclosed DC wall adapter (See Sections 4.3.1 and 4.3.2 above).
If you wish to supply power via pin KK on the interface, you must
change the setting of the
power supply jumper
on the printed cir-
cuit board See Appendix E. All power sources must be SELV
(Circuit, Safety Extra Low Voltage) specified. (See CENELEC
EN60950, Section 1.2.8.5)
5.0 OPERATION
Once the Model 2094 is installed and configured properly it is ready
to place into operation. This section describes the function of the LED
indicators, and the use of the loopback and pattern test modes.
5.1 LED DESCRIPTIONS
The Model 2094 is equipped with seven LED indicators that moni-
tor the status of communication. Figure 4 (below) shows the location
of the LEDs on the Model 2094 front panel.
TXD When the unit sends a one, the TXD LED is
turned on. When it sends a zero, the TXD
LED is turned off. Moreover, the TXD LED
is active only in active DS0 channels. In
inactive channels, the TXD LED is off.
RXD When the unit receives a one, the RXD LED
is turned on. When it receives a zero, the
RXD LED is turned off. Moreover, the RXD
LED is active only in active DS0 channels.
In inactive channels, the RXD LED is off.
RXD
LOS
ALM
ERR
T/L
PWR
TXD
Model 2711
Figure 4. Top of Model 2094, Showing LED Indicators
Model2094
To Power
Supply Jack
To -48VDC
Source
-Vin
+Vin
SWITCHING POWER SUPPLY
MODEL : SYD1106-0505
INPUT : 36-60V 0.2A MAX
OUTPUT : +5V 1.0A
OUTPUT POWER : 5W MAX
S/N: G01234567890
MADE IN CHINA BY SUNNY
Black lead (-V)
Red lead (+V)
Barrel power connector