Connections; Figure 3. Htu-C Edge Connector Wiring; Figure 4 Htu-C Span Powering Diagram - ADTRAN 3192 HTU-C Installation And Maintenance Manual

Step 1 Enter size of fuse for shelf (Amps) ................................................................
(Size required for over current protection (i.e., 100%, 75%, 50%) ...............
Step 2 Determine the mix of HDSL circuits in shelf.
Percentage of circuits with an HTU-R only ...................................................
Percentage of circuits with one HRE and an HTU-R ....................................
Percentage of circuits with two HREs and an HTU-R ..................................
Step 3 Determine the current draw of the HDSL circuits.
Multiply (C) by 0.2 Amps (with no HRE) .....................................................
Multiply (D) by 0.3 Amps (with one HRE) ...................................................
Multiply (E) by 0.51 Amps (with two HREs) ................................................
Step 4 Add (F) through (H) to get total current draw ...............................................
Step 5 Divide (B) by (I) to get the number of units per shelf ...................................
* If the number of units/shelf is greater than or equal to the shelf's slot availability, full shelf population is allowable.

3. CONNECTIONS

The 3192 HTU-C occupies one card slot in a CI
Wescom 3192 Office Repeater Bay. Power and alarm
signals are provided to the card through the backplane
of the shelf. DSX-1 and HDSL loop signals are
connected to the wire-wrap pins or mass termination
shelf connectors corresponding to the slot the unit
occupies. Connections to the DSX-1 pins are intended
for intra-building wiring only. See Figure 3 for
HTU-C edge connector wiring.
The HTU-C is capable of span powering the HTU-R
by applying simplex current to the local loop. From 10
to 125 mA of current is coupled onto the HDSL span
to power the HTU-R and HRE when deployed. The
span powering voltage can be configured to be either
less than -140 or -190 volts with Loop 1 providing the
negative voltage and Loop 2 the return (see Figure 4).
Alarm Connections
The following alarm signals are connected to the 3192
Alarm Module.
Pin Label
H ........... RCV LOS ............. Loss of Signal alarm
10 .......... FUSE ALARM ..... Fuse alarm of -48V supply
2
The LOS alarm will be activated if and only if sealing current has been
present on the HDSL loops.
Alarm processing is actually performed by the 3192
Alarm Module. Refer to the 3192 Alarm Module
documentation for further information.
61245004L6-5D
Table 6. Power Consumption Worksheet
Function
2
Section 61245004L6-5, Issue 4
(A) _____ Amps
(B) _____ Amps
(C) _____ %
(D) _____ %
(E) _____ %
(F) _____ Amps/unit
(G) _____ Amps/unit
(H) _____ Amps/unit
(I) _____ Amps/unit
_____ Units/shelf*
R TX DSX (In from DSX)
1
R1 RX DSX (Out to DSX)
2
3
4
GND
5
R1 HDSL Loop 2
6
7
-48V
8
R HDSL Loop 1
9
Fuse Alarm (to Alarm Module)
10
T TX DSX (In from DSX)
A
T1 RX DSX (Out to DSX)
B
C
D
E
T1 HDSL Loop 2
F
RCV LOS (to Alarm Module)
H
Frame Ground
J
T HDSL Loop 1
K
L
HDSL Loops 1 and 2 are dual duplex
loops--capable of simultaneously
transmitting and receiving data.

Figure 3. HTU-C Edge Connector Wiring

2B1Q SPAN POWER
HDSL REGULATOR

Figure 4 HTU-C Span Powering Diagram

LOOP 1
SPAN CURRENT
LOOP 2
5