MX3 Chassis
P/N: 1189001G3
CLEI: M3M2C00A_ _
MX3 CHASSIS
4. Connect the frame ground from the frame ground lug on the rear panel of the MX3 Chassis to the
equipment rack grounding screw using appropriately sized wire that is at least the same gauge as
the power wiring.
5. Test the frame ground connection to ensure proper ground. Using a multimeter set to its lowest
resistance range, place one lead on the rack’s ground strap and the other on the MX3 Chassis frame
ground terminal. The reading should be less than 0.1 ohm. Greater readings should be investigated.
6. Make power connections to the MX3 Chassis.
NOTE: A readily accessible disconnect device, such as a rackmount fuse and alarm panel that is
suitably approved and rated should be incorporated into the fixed wiring.
Connect to a reliably grounded –48 VDC or ±24 VDC source which is electrically isolated
from the AC source.
The branch circuit overcurrent protection should be a fuse or circuit breaker rated –48 VDC,
1.5 amp slow-blow or ±24 VDC, 3 amp slow-blow.
6a. Determine which fuse pairs are to supply power to the chassis.
6b. Remove the fuses from the A and B slots for the pair.
6c. Connect the ends of one wire between the “A” CO VDC supply and the
PWR A terminal on the
MX3 rear panel.
6d. Connect the three remaining wires in the same manner. Connect the “A” CO VDC return with
RET
A; “B” CO VDC supply with PWR B; and “B” CO VDC return with RET B.
7. Apply power and check voltages.
WARNING: Installing fuses in the fuse and alarm panel at this stage will provide power to the
chassis. There will be power to pins and connectors on the rear panel and inside the
chassis. Exercise caution to avoid electrical shock.
7a. Install appropriate fuses (1.5 amp slow-blow, –48 VDC or 3 amp slow-blow, ±24 VDC) in the
slots in the fuse and alarm panel that services the MX3 Chassis.
7b. Using a voltmeter, place the common (normally black) lead on the
RET A post of the DC power
terminal block and the DC volts (normally red) lead on the
PWR A post of the DC power
terminal block. For a –48 VDC supply the reading should be in the operating range of
–42 VDC to –60 VDC. For a ±24 VDC supply the reading should be in the range of ±22 VDC
to ±27 VDC.
7c. Repeat the above step for the RET/PWR B connections.
7d. Remove the fuses from the fuse and alarm panel servicing the MX3 Chassis.
7e. Install the protective cover over the power terminal block.
DESCRIPTION
The ADTRAN
®
MX3 Chassis is the foundation for a family of data backhaul products. Supporting up
to four DS3s, 28 DSX-1 drops, and two optional modules capable of processing up to six additional
DS1s, the MX3 platform is well suited to a variety of applications. The MX3 Chassis houses two hot-
swappable controller modules that provide 1:1 redundancy for the DS1 and DS3 interfaces. The
optional modules support a variety of non-redundant services.
WARNING: For configurations utilizing a single controller module, the empty controller module
slot must be occupied by a Controller Blank Plug (P/N 1189005G3). Likewise, empty
module slots must be occupied by a Module Blank Plug (P/N 1189006G3).
Features of the MX3 Chassis include the following:
♦ 1:1 Controller card redundancy
♦ Hot-swappable controller and module cards
♦ Optional fan module
♦ NEBS Level 3 compliant
REAR PANEL
The MX3 Chassis rear panel (see illustration on reverse page) is equipped with an Ethernet port, an
alarm output terminal block, auxiliary input terminals, four sets of DS3 in/out jacks, two amphenol
connectors, and DC power connections.
INSTALLATION AND TURNUP
1. After unpacking the unit, inspect it for damage. If damage is found, file a claim with the carrier and
then contact ADTRAN Customer Service. Refer to the Warranty information at the bottom of the
reverse page.
2. Attach the mounting brackets to the MX3 Chassis using the two screws provided for each bracket.
For 19-inch rack applications, attach the brackets with the long flange to the side of the chassis. For
23-inch rack applications, attach the brackets with the short flange to the side of the chassis.
3. Use the appropriate rack type screws to mount the MX3 Chassis into the rack.
WARNING: Care should be taken to not upset the stability of the equipment rack after installation
is complete.
NOTE: The unit must be installed in accordance with the requirements of NEC NFPA 70.
When mounting the MX3 Chassis in a rack, multiple chassis can be mounted in adjacent rack
slots. To allow for proper heat dissipation, certain controller and module combinations may
require an optional Fan module (P/N 1189007G3) obtainable from ADTRAN. Refer to specific
controller card documentation for requirements.
61189001G3-22A
0711
B
A
ETHERNET
MX3RMM
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
