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Chapter 2 Installing the Encoder
Figure 2–6
shows the DC power supply for the Electra 9200D.
40V - 60V
15A Max.
+Vin
GND
-Vin
PSU 1
Figure 2–6: DC Power Supply for Electra 9200D
Getting Started
Before you begin wiring the –48 VDC power supply, make sure you provide the necessary
overcurrent protection, wires, and power connector.
Power Source Specifications
The DC power source feeding the encoder must meet the following requirements:
Electrically isolated from any AC power source.
n
Positive ground. The Positive bus of the DC power source must be reliably connected to
n
the Ground bus.
Each feed-pair must provide a continuous supply of power that meets the specifications
shown in
Table
Table 2–1: DC Power Source Requirements
Voltage
Max operating current
Max input surge current
Overcurrent Protection
To provide overcurrent protection:
Provide overcurrent protection devices as part of each rack housing encoders.
n
Locate a readily accessible disconnect device between the DC power source and the
n
encoder.
Use a 20-amp double-pole fast trip, DC-rated disconnect device for each DC power
n
connector.
NOTE: Overcurrent protection devices must meet applicable national and local electrical safety codes
and be approved for the intended application.
Wiring Requirements
The encoder is connected to the DC power source using three wires:
–Vin
n
GND
n
© 2015 Harmonic Inc. All rights reserved.
PSU 2
-Vin
GND
+Vin
(RN-25)
2–1.
Parameter
40 to 60 VDC
1 5 amps
n
n
Specification
20 amps--Electra-9200
30 amps--Electra-9200D
17
Connecting the Power
Electra 9200, Rev O
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