C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
For more information, refer to the OPTI-3 OCM Installation and Maintenance Practice (P/N 61184002L5-5) available online at
OPTI-3
WMC
CLEI: SOM1500L_ _
P/N 1184001L1
OPTI-3 Wallmount Chassis (WMC)
POWER CONNECTIONS
NOTE: Use one of the following methods when powering the unit locally:
a) Connect to a reliably grounded –48 VDC source, which is electrically
isolated from the AC source. The branch circuit overcurrent protection shall
be a fuse or circuit breaker rated minimum 60 VDC, maximum 15A. A
readily accessible disconnect device (such as a rackmount fuse and alarm
panel that is suitably approved and rated) should be incorporated in the
fixed wiring.
b) Connect to an Approved Class 2 Type (LPS) power supply rated 48 VDC,
maximum 240 VA.
To Provide Power Using a –48 VDC Source:
1. Determine which fuse pairs are to supply power to the shelf.
NOTE: The OPTI-3 WMC will function properly with a single –48 DC power source
connected to either the A or B terminals, or two separate –48 VDC sources
connected to A and B power terminals.
2. Remove the fuses from the A and B slots for the pair.
3. Cut four lengths of 16 or 18 gauge (16 recommended) conductors to reach from
the terminals on the fuse and alarm panel to the power terminals on the WMC.
WARNING: The power wire gauge should not be heavier than the ground wire.
4. Using a crimping tool, connect lugs to both ends of each wire.
5. Using a screwdriver, connect the ends of one wire between the “A” CO –48 VDC
supply to the
–48VA
terminal on the WMC backplane.
6. Connect the three remaining power wires in the same manner:
a. Connect the “A” CO –48 VDC return to
RET
A
b. Connect the “B” CO –48 VDC supply to
–48 VB
c. Connect the “B” CO –48 VDC return to
RET
B
To Provide Power Using the OPTI-3 AC to –48 VDC Power Supply:
The OPTI-3 AC to –48 VDC Power Supply Assembly (P/N 4184004L1) includes:
♦
AC to –48 VDC power supply (P/N 1175043L2)
♦
Adapter (P/N 3125069@A)
To use the Power Supply Assembly, perform the following steps:
WARNING: Do not connect the power supply to an AC power source at this point.
1. Connect the end of the adapter with the 4-pin modular connector to the end of the
power supply cord with the 4-pin modular connector.
2. Connect the end of the adapter with the three loose wires to the rear of the WMC:
a. Connect the red wire to
–48VA
.
b. Connect the black wire to the adjacent
RET
terminal.
c. Connect the green wire to the terminal labeled with the ground symbol.
3. For redundant power, repeat step 2 for the
–48VB
power terminal,
RET
, and
ground, using the wires from the redundant power supply.
NOTE: For redundant power, A and B feeds share the same ground terminals.
Figure 1. OPTI-3 WMC
DESCRIPTION
The OPTI-3 Wallmount Chassis (WMC) mounts to a wall or shelf and hosts two
redundant OPTI-3 Controller Modules (OCM). The WMC provides six BNC
connectors on the chassis backplane, corresponding to the Tx/Rx of the three DS3
interfaces.
The following features are supported on the WMC:
♦
Dimensions: 3.5 inches (2U) H × 6.25 inches W × 11.5 inches D
♦
Provides one OC-3-to-three-DS3 multiplexing capability
♦
Wire wrap pins for three external alarm inputs
♦
Primary and secondary DS1 BITS clock inputs
INSTALLATION
To install the WMC, perform the following steps:
1. Inspect the WMC for damage. If damage is found, file a claim with the carrier
then contact ADTRAN
®
Customer Support.
2. Position the mounting brackets in an orientation that positions the ears of the
brackets flush with the mounting surface. Attach the brackets to the WMC using
the provided screws and the pre-tapped holes on the sides of the WMC.
3. Using the appropriate screws for the mounting surface to which the WMC will be
attached, mount the WMC in the desired location.
4. Using 14 to 18 gauge wire (14 recommended), make the connection from the
frame ground terminal on the backplane of the WMC to an earth ground.
WARNING: Make the frame ground wire at least the same gauge as the power
wire or heavier.
5. Test the frame ground connection to ensure proper ground: Using a multimeter
set to its lowest resistance range, place one lead on the earth ground and the other
lead on the WMC frame ground terminal. The reading should be less than 0.1
ohms. Greater readings should be investigated.
61184001L1-22C
0504
*61
184001
L1-22C*
WMC
WMC
OPTI-3
ENABLE
TEST
APS
AC
O
1184
002L
1
STATUS
OPTICS
DS3-1
DS3-2
DS3-3 ACO
OPTI-3
ENABLE
TEST
APS
AC
O
1184
002L
1
STATUS
OPTICS
DS3-1
DS3-2
DS3-3 ACO
