Section DSA-WM2-140-202
030-101674 Rev. A
R
7
0803I2RA
Figure 6. Front View of Enclosure (Door Removed)
Static Wrist-Strap Jack
J1
J3
J5
J7
J2
J4
J6
J16 RCV FROM CUST
.
CUSTOMER INTERFACE
Card
Guides
RJ48C
Jacks
50-Pin
Amphenol
Female
Connector
Ground Lug
Telco
Termination
Module
200 MECHANICS
or
Card Slots
400-Type
(Plus one
Access Hole
Card
Guides
Card
Edge
Connector
J1 - J14
in PCB
for AC
Empty
for
External
Grounding
RJ48H
Fourteen
Seven
Knock-Out
for TB1
Connections
Power Supply
Ground
Connections
J9
J11
J13
J10
J12
J14
J8
J15 XMT
T
O
CUST
.
Power Supply
Slot
Slot 15 for
MPS2555I2
r
Route this GRN/YEL wire through the square hole in the back
panel at the rear of the top, horizontal slot provided for this
plug-in module, then connect it to the chassis ground screw on
the back panel.
3.5.4
Local DC Powering Ground Connections
When local DC is used with an external power source and the
Telco Termination Module, the circuit, chassis and shield
ground connections are made to TB1 on the
Telco Termination
Module
. Figure 7 shows the TB1 ground connection locations.
Return ground connections can be made with stripped wire or
by spade lug connectors. TB1 screw poPWR" is the
battery return. TB1 screw position CKT GND" provides cir-
cuit ground as described in Paragraph 3.5.2. TB1 screw position
CHASSIS GND" termination should be made via a separate
conductor to the multi-ground neutral of the building ground.
TB1 screw position SHIELD GND" provides for a shield
ground as stated in Paragraph 3.5.5.
Under normal conditions, each terminal will draw less than 1-¾
A steady state current. CKT GND should be run to a ground
buss over a separate wire.
- CAUTION -
Power applied to TB1 must be wired through conduit. A hole
knock-out is provided on the left side of the enclosure
adjacent to the Telco Termination Module which accepts a
½-inch conduit connector.
3.5.5
Drain Wire Connections/Shield Ground
If the end user requires a shield ground for inside wiring, a
separate connection to the multi-ground neutral of the build-
ing ground is needed to ensure proper noise suppression on the
data lines. The SHIELD GND screw position on TB1 provides
an earth ground connection point to ground all cable pair
shields connected to the
Telco Termination Module
.
3.5.6
Static Wrist Strap Jack
The static wrist strap jack, located at the top front of the enclo-
sure, is also grounded to the enclosure chassis/frame. Always
