®
TRANSPORT
1051-1 Chassis Configuration Guide
Installation
The TxPORT 1051- 1 chassis is designed to hold from one to
twelve TxPORT Model 2000, 2048, and/or 2100 CSU modules. The 1051-1 accommodates these modules with twelve
card slots open to the front of the chassis. Each module card
set interfaces a backplane board on the chassis rear through
two connectors. Through these card connectors, each module
receives a -48 VDC power source and exchanges control and
T1 input/output signals with the rear panel chassis connectors.
The chassis contains no active components.
Rack mounting ears are reversible for standard 19" or 23"
racks. To install, simply insert two screws through both the left
and the right mounting brackets.
Part Number 45-00049
Rev 1.00
Model 1051-1 Chassis, Front View
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
Unit 10
Unit 11
Unit 12
The rear panel chassis connections are described on the
reverse side of this sheet.
Specifications
Input Voltage: 115 VAC (± 20 V)
Output Voltage: 48 VDC (± 2 V)
Output Current: 2 A maximum, 50 mA minimum
Power Input: 113 W maximum
Heat Generation: 390 BTU
Efficiency: 80%
Mechanical: 17.2" W, 7" H, 10.5" D, 9.5 pounds
Line Chassis
Ordering Numbers
Shelf without power supply: 9-1040-000--110
Shelf with one power supply: 9-1040-000--111
Shelf with two power suppl ie s : 9-1040-000--112
Spare 48 V power supply: 9-1000-48V--1
Rack and19" or 23" Multiple
Mounting Hardware
TxPORT
127 Jetplex Circle
Madison, Alabama 35758
Customer Service
800-926-0085, ext. 227
Product Technical Support
8 a.m. to 5 p.m. Central
205-772-3770, ext. 256
800-285-2755, ext. 256
Emergency After Hours
205-603-2193
Manager: 205-603-2194
Connectors
Below is a description of the rear panel chassis connectors.
Refer to the reference manual of the particular module used
(2000, 2048, and/or 2100) for detailed information. Some
modules do not use all the connectors provided.
Equipment
referred to as a DSX interface. The e quipment physical interface is a standard RJ48H 50-pin connector.
Network
network interface. The network physical interface is a standard RJ48H 50-pin connector.
NMS:
nect the modules in the chassis to the EM8000 element manager. Within the chassis, each modul e is ph ysically co nnected
to the other un its in a d ais y cha i n fashi on. Two 6 -pin mo dul ar
connectors are provided for each of the ‘A’ and ‘B’ sides.
When a network manager is not used, both NMS ports must
be connected to each other with the supplied NMS cable.
Each module in the NMS chai n must use the same NMS bit
rate and have a unique address. Unit addresses do not correspond to chassis slot numbers.
: The module’s equipment side interface is
: The module’s network side is referred to as the
The ‘NMS IN’ and ‘NMS OUT’ ports are used to con-
switch setting. All CSU modules in a commo n chassis must
use the same alarm relay mode. Make connections to the
alarm contacts using 20-ga uge stranded wire (or similar).
: Power is received from an external supply (such as
Power
the TxPORT 1040 Power Shelf) and distributed to each card
slot. All units are powered by - 48 VDC sources which are
connected to the 6 -pin terminal strip. The chassi s is designed
with two power buses. The ‘A’ bus feeds the odd slots (1, 3, 5,
7, 9, and 11). The ‘B’ bus feeds the even slots (2, 4, 6, 8, 10,
and 12).
Connect a ground lead (18 to 20-gauge) to the terminal
marked ‘ ’ on the lower left corner. Connect the other end
of this lead to an appropriate facility ground.
Warning: Connect the ground lead be fore applying power to
the unit.
The chassis is shipped with a redundant power board installed
on the power connector. This board allows the chassis connection of two independent -48 VDC supplies operated in a
redundant mode. All slo ts in the chassis are p owered from the
combined input of the A and B power supplies. If either supply fails, the other will power the entire chassis.
To operate in the redundant power mode, connect the A bus
terminals to the corresponding terminals of power supply A.
Connect the B bus terminals to the corresponding terminals of
power supply B.
When using a single power source, simply connect the A bus
terminals on the redu ndant power board to the corresp onding
terminals of power supply A. This is the same as the redundant configuration with supply B not operational.
When using a dual indep endent power supply, one - 48 VDC
source feeds the A bus while another - 48 VDC source feeds
the B bus. First, r emove the redundant power board. Conn ect
the A bus terminals to the corresponding terminals of power
supply A (to power the odd numbered slots). Connect the B
bus terminals to the corresponding terminals of power supply
B (to power the even numbered slots).
Each module requires a cert ain amoun t o f cu rrent. Ens ure that
the proper fuse size is us ed. If using the 1040 Power Supp ly
Shelf, refer to the accompanying configuration guide.
The ‘NMS OUT’ port is an output only connection used for
connecting multiple units together in a daisy chain in/ out bus
arrangement. The network manag er connects to the ‘IN/OUT’
port of the first unit in the chain. The ‘OUT’ port is used for
connection to the ‘IN/OUT’ port of the next unit. The last unit
in the chain connects its ‘OUT’ port to the ‘IN’ port of the
network manager.
The communications bus is automatically tied into each module, allowing single point interfacing to the chassis. Cards
may be inserted and removed from the chassis without rewiring the communications bus. Communications are restored via
the shorting contacts on the backplane when a slot is vacant.
External Clock
: External contacts are provided (with a 5-pin
terminal strip) to permit connection to a remote clocking
source
Alarm Out
: Alarm relay contacts are provided for connection to a remote indicating device. The two contacts labeled
‘Alarm Out’ are configured to operate either in a ‘normally
open’ or ‘normally closed’ mode, depending on the module’s
(not used)
Alarm
External
Clock
Out
(B)
NMS
IN
(B)
NMS
OUT
Power Board
ASSY 2000- 053
REV
S / N
-48 VDC
Chassis Ground
-48 V Return
Redundant
Signal Ground
(A)
(B)
BUS
BUS
Model 1051-1 Chassis, Rear View
EQUIPMENT
25 1
2650
125
-48 VDC
-48 V Return
J1
NETWORK
50 26
J2
1051 Chassis
Minor Alarm
Major Alarm
Controller
Alarms
(not used)
(A)
NMS
IN
(A)
NMS
OUT
1
Controller
Ports
(not used)
2
3
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