Power and Grounding
150-204-111-01, Revision 01
10
April 7, 2000
HRE-204 List 1A and List 2A
48 V
OLT
P
OWER
O
PTIONS
When using the HRE-204 to locally power HRU plugs or HLU-432 line unit, the 48 V power can be provided in
either isolated or non-isolated mode. Power is provided to terminal blocks TB3 and TB4, the pin assignments for
which are shown in
.
The isolated mode requires two separate external power supplies, which are connected to TB3 for Slots 1 and 2,
and to TB4 for Slots 3 and 4. This isolated mode prevents the loss of all circuits if one power supply fails.
The non-isolated mode only uses one power supply, but has no fail-safe feature. All circuits are lost if the power
supply fails. To connect a single power supply for non-isolated mode:
1
Connect the power supply to either TB3 or TB4.
2
Connect the equivalent pins of the unused terminal block to the active terminal block. This connects the power
source to all slots.
Figure 8.
TB3 and TB4 Pin Assignments
Third party wall mount power supplies can be used to provide -48 V power for various plug applications, as shown
in
Table 2.
Power Requirements for Various Plug Applications
HiGain Unit
Maximum
power per unit
Number
of units
Current
Required (mA)
Power supply
Input Power
AWG Wire Size
(a)
(Two Inputs) (One Input)
(a) Minimum input power lead wire size current capacity is based on 1000 circular mils per ampere.
HRU-402, List 4
3.5 Watts
1
73
Westell 6048-01 (100 ma)
26 AWG
26 AWG
1, 2, or 3 210
Teltrend 2005 (250 ma)
26 AWG
26 AWG
4
300
Troncom WPS-4806 (520 ma)
26 AWG
26 AWG
H2TU-R-402, List 4
6 Watts
1
125
Teltrend 2005
26 AWG
26 AWG
2
250
Troncom WPS-4806
26 AWG
26 AWG
HLU-432
(no doublers)
14 Watts
1
2
300
600
Troncom WPS-4806
Troncom WPS-4810
26AWG
26 AWG
26 AWG
22 AWG
HLU-432
(with doublers)
24 Watts
1
2
500
1000
Troncom WPS-4806
Troncom WPS-4810
26 AWG
22 AWG
22 AWG
20 AWG
