Appendix A- Technical Specifications
150-419-100-03>
50
September 25, 1998
HRU-419 List 1
Figure 22.
HRU-419 Block Diagram
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
gen5, +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).
T
he 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.
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.
HDSL 1
XCVR
HDSL 2
XCVR
6
8
48V*
Circuit GND
5
E, H, C, D, L, 3, 4
F
T1
FRAMER
B8ZS
AMI
ERR
BPV
ESF
SF
OK
OK
HDSL 2
ES
MAR
ES
JP1
LB
R
Not used
T
HDSL 1
S1
( - )
-
+
J
FRAME
GROUND
MAR
POWER SUPPLY
MICROPROCESSOR
LOGIC LOOPBACK
CLOC,TLOS
BPV
ERR
LOS
REM
LOC
RLEV
0
-15
TLOS-LB
DIS
EN
DEMUX
MUX
9
K
R
T
HDSL 2
( +)
SEALING
CURRENT
OPTION
RS-
232
METALLIC
LOOPBACK
SMJK
NREM
B
2
1
A
R1
DS1/RCV
DS1/TX
T1
( + )
I-CPE
T
R
( - )
0
60
1
+
-
60 mA MON
-48 V power supply is required for local power applications
