Spi-Rf Installation; Fig. 2-6, Spi-Rf Hardware Stack Up; Fig. 2-7, Pole And Ground Mount Enclosure Installation (Spi-Rf) - EnerSys alpha SPI-20 Manual De Instalación

2.0 Installation
2.2

SPI-RF Installation

Tools Required
• Channel lock pliers
• 1" torque wrench set to 130 in-lb
Procedure
1. Locate opening for SPI-RF installation
(see Fig. 2-1). A knockout is reserved for
installation of a secondary SPI (if required).
2. Remove lid from enclosure.
3. Hold the SPI-RF in place using channel lock
pliers while tightening the nut. Torque to
130 in-lb.
4. Verify the bypass switch is in the ALT.
position.
5. Connect SPI-RF to the power supply's Output
1 connector. (For wiring instructions, refer
to the corresponding power supply technical
manual which can be downloaded at
www.alpha.com.)
6. Connect the SPI-RF to the power supply
transponder via the RF In / Out port with a
coaxial RF cable.
7. Connect the coupler cable to the coaxial
cable termination port on the back of the SPI-
RF and secure in place via the seizure screw.
Torque to 25 in-lb.
NOTICE:
When installing a SPI-RF, use of
a directional coupler is required to
allow both RF & AC to pass from the
plant to the SPI-RF.
8. Turn on AC breaker (located on enclosure)
and verify correct (per unit's nameplate
voltage) utility voltage at outlet; if correct,
plug in line cord to the utility outlet.
9. Turn the power supply battery breaker ON.
10. Toggle bypass switch to ON.
745-997-C0-001 Rev. B (02/2021)

Fig. 2-6, SPI-RF Hardware Stack Up

Enclosure
SPI-RF
RF
DOCSIS Transponder

Fig. 2-7, Pole and Ground Mount Enclosure Installation (SPI-RF)

Enclosure Wall
Directional
Coupler
Original cable carries AC
and NMS signals
AC
Power Supply
Nut
Plug
9