Power Line Carrier ____________________________________________________________________
RF-MCGARDPRO
Hubbell Power Systems, Inc.
–
RFL™
Products
July 1, 2022
©2022 Hubbell Incorporated
5-70
5.6.9 Motherboard
The HPS/RFL 9508 Motherboard is mounted on the rear right side of the 9508 chassis as viewed
from the front. It provides interconnections for the five RF modules that plug into it from the
front of the chassis. The illustration below shows the rear view of the motherboard. Connectors
J6 and J7 are TNC connectors which provide connections to the line coupling equipment. J4, J5,
J8 and J9 are BNC connectors, J10 is a two-pin plug-in connector, and TB1 is an eight position
terminal block.
RX OUT
4W RX
4W TX
OR 2W I/O
EXT AMP
FAIL IN
EXT AMP IN
TX IN
EXT AMP
OUT
EXT
AMP
FAIL
INT
AMP
FAIL
C
C
NC
NC
NO
NO
Dotted lines indicate boards that plug into the Motherboard from the front of the
9508 chassis
Attenuator
Board
RX Filter
Line Board
TX Filter
Balance
Board
J8
J6
J7
J10
TB1
J5
J1
J3
Figure 5-47. 9508 Mother Board, Rear View
Table 5-27 Motherboard Rear Panel Connector Assignments
Board Label
Reference
Designation
Connector type
Application
TX IN
J1
BNC
Tx In from the HPS/RFL GARD Pro system PLC
EXT AMP IN
J5
BNC
Input signal from external amp
EXT AMP OUT
J3
BNC
Output signal to external amp
4W RX
J6
TNC
4W Input from line coupling equipment
4WTX OR
2WI/O
J7
TNC
4W Output to line coupling equipment or 2W
Input/Output
RX OUT
J8
BNC
Rx Out to the HPS/RFL GARD Pro system PLC
EXT AMP FAIL
IN
J10
Two-pin plug-in
type
External Amp Fail input
INT AMP FAIL
EXT AMP FAIL
TB1
8-position terminal
block
Power Amplifier Fail, Relay Contacts
(See the following table for terminal assignments)