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Compliance
Table 1
shows the compliance codes for the NIU3 PM.
The NIU3 PM is NRTL listed to the applicable UL
standards.
Table 1. Compliance Codes
Code
Power Code (PC)
Telecommunication Code (TC)
Installation Code (IC)
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation.
Changes or modifications not expressly approved by
ADTRAN could void the user's authority to operate this
equipment.
This product is intended for installation in a DC-C
(common) bonding and grounding system only. It is not
intended or designed for installation in a DC-I (isolated)
bonding and grounding system.
2. INSTALLATION
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
After unpacking the NIU3 PM inspect it for damage. If
damage is noted, file a claim with the carrier, then
contact ADTRAN. For more information, refer to the
Warranty and Customer Service
This product is intended for use in a restricted access
area in a type "B" or "E" enclosure only.
Location
The NIU3 PM installs at any convenient location
adjacent to the customer. The NIU3 PM can pass both
network and customer signals up to 900 feet. If total
transmission distance exceeds 900 feet, DS3 data may
cease during NIU3 bypass operations. The DS3 NIU is
not intended for use as a repeater. See
2 for maximum recommended transmission distances.
61213075L2-5E
Input
Output
F
C
–
–
A
–
section.
Figure 2
on page
Issue 5, February 2011
The NIU3 PM inserts into the host circuit board of the
standalone housing or the backplane edge connector on
either of the shelf units. Card guides direct the unit for
correct insertion and prevent perpendicular movement.
The unit is secured with two front panel thumbscrews.
Jack Connections
The three housings each have four rear panel BNC
connectors for each NIU3 PM:
• Two for Customer Receive/Transmit
• Two for Network Receive/Transmit
Two additional mid-size jacks on the NIU3 PM front
panel provide a nonintrusive monitoring point for the
transmit network and customer signals. The front panel
DB-9 provides an RS-232 craft interface. The
standalone housing or shelf security panel must be
opened to access the monitoring jacks and the RS-232
craft interface.
Housing Ground Option
CAUTION
Terminate grounds to an approved ground
location. Check metal-to-metal contact on all
ground connections, and verify ground circuit
continuity.
Optionally, frame ground is provided by ground posts
on the standalone chassis. The ground posts and
electrically connected. A ground wire portal on the rear
panel of the housing provides access for grounding via
. The ground posts are installed on the standalone
TB1
housing, the 3-slot shelf, and the 12-slot shelf rear
panels. A 6 AWG (maximum) ground lug is included
with each chassis for connecting the ground wire to the
ground posts.
Shelf Power
The NIU3 PM operates on local ±24 VDC or –48 VDC.
The standalone housing, 3-slot, and 12-slot shelf
backplanes have a dual power terminal (
terminal connections for
wiring (18 AWG minimum) plus a common
RET B
Frame Ground (18 AWG minimum) connection (see
Figure 3
on page 4). The standalone housing has a
power wire portal on the rear panel for termination on
the host circuit board at
TB1
TB1
) with
TB1
,
and
PWR A
RET A
PWR B
.
are
,
3
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