REDUNDANT & HIGH POWER CONNECTIVITY
Page 14 of 25
The 56VDC power from the NV-PS56-250W is delivered to the
NV-ER1816i Hub via terminal blocks on the rear of both units.
Augmented Power
Under normal conditions, the load is shared
equally between the Internal and the Auxiliary power supplies. The
available power for remote devices is the sum of that of the Hub’s
internal power supply plus that of the Auxiliary Power Supply, less
the power needed to operate the Hub. [250W + 250W - 30W =
470W] When calculating total network power, one must also include
3 watts for each remote transmitter, as well as power dissipated in
the wire.
Redundant Power
The same Auxiliary Power Supply may be used
in the same topology for redundant power operation.
Each power supply is expected to be able deliver all power needed
to operate the Hub and its remote devices. The available power for
remote devices is that of the power supply less the power needed to
operate the Hub. [250W - 30W = 220W]. Again, when calculating
total network power, one must also include 3 watts for each
remote transmitter, as well as power dissipated in the wire.
The NV-PS56-250W Auxiliary power supply is available in single,
double, and triple configurations within one 1U enclosure. These are:
NV-PS56-250W
Single
250W
NV-PS56-250W-2
Dual
250W
NV-PS56-250W-3
Triple
250W
Each power supply within a multi-output unit is equipped with its
own mains inlet, power-cord, 56VDC wiring harness, and rack-
mount ears.
Each power supply within a multi-output unit is intended to support
one and only one TBus Hub.
WARNING
: For safety, never use more than one Auxiliary
Power Supply with each NV-ER1816i Receiver Hub.
DUAL POWER DETAILS
MULTI-OUTPUT POWER SUPPLIES
Figure 15 - Single NV-1816i
Figure 16 - Dual NV-1816i
Figure 17 - Triple NV-1816i
NV-ER1816i
NV-PS56-250W
NV-ER1816i
NV-PS56-250W-2
NV-ER1816i
NV-ER1816i
NV-ER1816i
NV-ER1816i
NV-PS56-250W-3
ALARM OUTPUTS
The NV-ER1816i has optional terminal block connections for alarm
output contact closures. Solid-state relay contacts are closed when
56VDC is present. Terminals 5 & 6 report the power supply status of
the Internal power supply, while terminals 7 & 8 report the power
supply status of the Auxiliary power supply. Maximum 60V, 100mA,
16 , 1,000V isolation.
Although Auxiliary power supplies also have these connections, it is
recommended that monitoring take place only at the Hub.
Figure 18 - Interconnections
OFF
ON
INPUT 250 WATTS FUSE RATED 250V 6.3A T
INPUT 100 ~ 240 VAC 50/60Hz 5 AMPS
Remote Power Supply
INPUT 56VDC 4.5 AMPS CLASS 2
USE ONL
Y
WITH
A 25
0V
FUS
E
!
OFF
ON
INPUT 250 WATTS FUSE RATED 250V 6.3A T
INPUT 100 ~ 240 VAC 50/60Hz 5 AMPS
Remote Power Supply
INPUT 56VDC 4.5 AMPS CLASS 2
USE ONL
Y
WI
TH
A 25
0V
FUS
E
!
NV-ER1816
i
Ethernet Receiver Hub
NV-PS56-250W
Auxiliary Power Supply
Pin 1
+
56
V
DC
0
V
DC
0
V
DC
+
56
V
DC
Pin 1
16 AWG
85°C
18 AWG
To Alarm
System
+
56
V
DC
Inter
nal
Co
ntac
t C
losure
+
56
V O
K
=
C
on
tac
t
C
lo
se
d
Auxiliary Cont
act
Cl
osure
+
56
V O
K
=
C
on
tac
t
C
lo
se
d
0
V
DC
0
V
DC
+
56
V
DC
Disconnect AC mains power
on both units before connecting
wiring harness.
Torque all connector screws
to 2 in-lbs (0.2 Nm)
