ADTRAN Total Access 1500 Chassis 1180001L1 Installation And Maintenance Practice page 11

NOTE
Each three-pin alarm header is wired the same
way for the specified alarm.
The following steps are instructions for connecting
alarm outputs to the Total Access 1500.
1. Determine whether the external alarm reporting
device uses a normally open or normally closed
circuit for alarm relay.
2. Using standard telco cross-connect wire, determine
and cut the length required to reach from the alarm
headers to the alarm-reporting device.
3. Using wire strippers, strip 1 to 1-1/2 inches from
both ends of the wire.
4. Using a wire-wrap gun, wire wrap one strand to the
center pin (common) from the Total Access alarm
relay header, and the other strand to either the
"NO" (normally open) or "NC" (normally closed)
pin on the relay header.
5. Connect, using wire wrap or lugs, as appropriate,
the two wires to the appropriate terminals on the
external alarm relay device being used.
Connecting Miscellaneous Alarm Inputs
There are four external alarm inputs that can be reported
to the SCU on the Total Access 1500 shelf: AUX1,
AUX2, AUX3, and AUX4. Terminal B supplies a
–48 VDC source. Terminal A expects –48 VDC if an
alarm condition exists on the alarmed equipment.
The following steps should be used to connect an
external alarm input to the shelf:
1. Using a #1 phillips-head screwdriver, remove the
long, thin guard if it is not already off.
2. Choose an alarm header set from block, P13 or
P18, on the top of the Total Access 1500
backplane.
3. Using standard telco cross-connect wire, determine
and cut the length required to reach from the
alarmed piece of equipment to the chosen header.
Allow length for 1 to 1-1/2 inches of stripped wire
for wire wrap, and neat routing out from the Total
Access 1500 shelf.
4. Using wire strippers, strip 1 to 1-1/2 inches from
both ends of the wire.
61180001L1#S-5D
Omit step 5
has its own source of –48 VDC and does not
need the –48 VDC feed from the Total Access
1500 shelf. The Total Access 1500 shelf
expects to see –48 VDC on pin A of the alarm
pair when an alarm condition exists.
5. Using a wire-wrap gun, wire wrap one wire to the
B pin of the Total Access 1500 alarm input header
( or
P13 P18
alarm terminal marked "B."
6. Wire wrap one end of the second wire to the A pin
of the Total Access 1500 alarm header (
) and the other end to the appropriate
P18
equipment alarm terminal.
7. Using a #1 phillips-head screwdriver, replace the
long, thin guard using the screws provided.
Check with the equipment manufacturer for
exact alarm markings.
Network Management Connections
The Total Access 1500 shelf integrates onto the
backplane several different management ports to allow
for remote management of the shelf. The management
interface is on the System Controller Unit (SCU)
discussed in detail in the System Description section of
the Total Access 1500 System Manual.
Up to 32 shelves can be linked together on the RS-485
bus for management of those shelves from a single
management interface.
, located in the upper center of the Total Access
SW2
1500, is used to enable/disable RS-485. There is also a
3-position wire-wrap header,
interface.
Connecting the RS-485 Bus Between Shelves
Up to 32 shelves can be linked together for management
from a single shelf designated as host (the other shelves
will be configured as clients). This feature allows
conservation of valuable external management ports
within the CO, and provides local or remote
management for up to 32 shelves from the craft
interface on front of the host SCU, or from the remote
management port connections described in this section.
Issue 4, February 2009
NOTE
if the alarmed piece of equipment
), and the other end to the alarmed unit
NOTE
, for the RS-485
P12
or
P13
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