Figure 22. Hru-419 Block Diagram - ADC HRU-419 HiGain User Manual

Appendix A- Technical Specifications
E, H, C, D, L, 3, 4 Not used
R
6
HDSL 1
( - )
T
F
-
8
POWER SUPPLY
48V*
+
5
Circuit GND
FRAME
GROUND
J
R
9
HDSL 2
( +)
T
K
TLOS-LB
The HRU-419 power supply converts the 90 to 130 Vdc power feed that is
received on the simplex pairs (or the -48V input when locally powered) to
voltages and currents required by the HRU-419 circuitry. The power supply
generates +5, +3.3 and 30 Vdc outputs. The 30V output is converted to a
60 mA current feed used to simplex power the Network Interface Device
(NID).
Caution should be used when the HRU is used to power
Channel Service Units (CSUs). Some CSUs require more
output voltage than the 30 Vdc provided by the HRU. The HRU
cannot power both an NID and a CSU at the same time.
The HRU-419 typically dissipates 4.5 W of power with the I-CPE jumper
switch set to 0, and 6.3 W with the I-CPE jumper switch set to 60.
50
ERR
BPV
HDSL 1
XCVR
ES
MAR
OK
SEALING
JP1 CURRENT
OPTION
HDSL 2
ES
OK
MAR
HDSL 2
RS-
XCVR
232
MICROPROCESSOR
DIS
EN
-48 V power supply is required for local power applications

Figure 22. HRU-419 Block Diagram

September 25, 1998
RLEV
T1
FRAMER
MUX
LOGIC LOOPBACK
CLOC,TLOS
DEMUX
ERR
SF
LB
ESF
BPV
AMI
S1
B8ZS
REM
LOS
LOC
150-419-100-03>
0
-15
( + )
METALLIC
I-CPE
LOOPBACK
+
SMJK
1
NREM
60 mA MON
-
( - )
HRU-419 List 1
T1
B
DS1/RCV
R1
2
0
60
T
A
DS1/TX
R
1