User's Manual
Planning and PreparationPlanning and PreparationIntroduction
MCPS2135 System Operation 9
2001 Spectrian Corporation. All rights reserved.
1.1.32.2.3 Cable Connections
DC Power Supply
The MCPS2135 requires customer-supplied connections to the site +27 VDC
power supply. The MCPS2135 is normally connected to the power supply with a
separate connection for each RF module; a single connection to each shelf is also
possible using the optional shelf power bus. Table 2 shows the required current
and recommended power service for MCPS2135 systems with the indicated
number of active amplifier modules installed in a system shelf.
# RF
Modules
RF Output
Power
I
(Max)
,
27 VDC
Recommended Service
1 135W 55 Amps 2 wires (2/module), #6AWG, #10 lugs
1 ea. 60A Circuit Breaker
2 250W 110 Amps 4 wires (2/module), #6AWG, #10 lugs
2 ea. 60A Circuit Breaker
3 370W 165 Amps 6 wires (2/module), #6AWG, #10 lugs
3 ea. 60A Circuit Breaker
4 500W 220 Amps 8 wires (2/module), #6AWG, #10 lugs
4 ea. 60A Circuit Breaker
Table 3: Individual Power Connections to each RF Module
Single Bussed Connection
When using the bussed connection option, the service should be sized for a fully
equipped shelf. This will provide adequate service with capacity for future
expansion.
Recommended Service: 2 Wires, #2AWG, ¼”narrow tongue lug (T&B 55116 or
equivalent); 1 ea. 240A Circuit Breaker.
Chassis Ground Wire
The MCPS2135 shelf requires a customer-supplied chassis ground connection using
#8AWG with a ¼” ring lug .
RF Input and Output Cables
The MCPS2135 requires a single customer-supplied SMA male RF input cable
and a single customer-supplied male type-N RF output cable. The RF output cable
must be rated to properly handle the MCPS2135 output power. The female
connectors are on the rear of the MCPS2135 shelf. Spectrian offers optional RF
cables for use in connecting the MCPS2135 amplifier.
Alarm Interface Cables
The MCPS2135 requires customer-supplied interface cables to the system alarm
interfaces. The standard system has screw terminal connections to form C-relay
alarm contacts; optional RS 422 serial connections are also available. The alarm
connection options for the MCPS2135 are listed in Appendix A3.