INSTRUCTION MANUAL
NPPA-TT-PT
PATCH PANEL “Easy Patch” | 96 Bantam (TT) Jacks,Push Terminals

NEUTRIK AGNEUTRIK Zürich AG
Liechtenstein
Switzerland
Tel.: +423/237 24 24 Tel.: +41 44/736 5010
Fax: +423/232 53 93 Fax: +41 44/736 5011
www.neutrik.com
Draft. Nr.:
Update:NEUTRIK (UK) Ltd.
NEUTRIK USA INC.
Great Britain
USA
Tel.: +44 1983/811 441 Tel.: +1 732/901 9488
Fax: +44 1983/811 439 Fax: +1 732/901 9608

BDA80-2/ 3102M0801
03.08.2009

Data subject to change without prior notice. ©2007 NEUTRIK . ALL RIGHTS RESERVED.

NEUTRIK Tokyo Ltd.
Japan
Tel.: +81 3/3663 4733
Fax: +81 3/3663 4796

NEUTRIK France
NEUTRIK Vertriebs GmbHFranceGermany/Netherlands/Austria
Tel.: +33 1/4131 6750 Tel.: +49 8131/28 08 90
Fax: +33 1/4131 0511 Fax: +49 8131/28 08-30

NPPA-TT-PT Instruction ManualIndex
1. Electrical configuration.................................................................................................3
2. Replacement of Jack Pairs ..........................................................................................4
3. Reconfiguration by hand..............................................................................................54. Grounding variations ...................................................................................................6
5. Wiring ..........................................................................................................................86. Cable retention to the unit............................................................................................97. Channel identification ..................................................................................................98. Technical data ...........................................................................................................119. Wiring Diagram..........................................................................................................1210. Ordering Information................................................................................................13

Dimensional Drawings “Easy Patch” NPPA-TT
123456

Half Normalled Bottom

7891011Half Normalled Top1213141516Full Normalled

S
R
T

S
RT

1718192025Parallel

26272848

IsolatedS
RTGrounding

S
R
TS
RT

Common Signal Ground
Upper Row
Chassis Ground

S

S

S

S

S

R
T

R
T

R
T

R
T

R
T

S

S

S

TN

TN

S
T
R

Module Arrangement
Top View

T
R
RN

TN

Soldering Pads
to connect
Individual Grounds to Common Ground

Common Signal Ground
Bottom Row

RN
TN

T
R
RN

T
R
RN

Key

Front panel
Cable retention bar
Top coverPage 2 of 13

NPPA-TT-S

NPPA-TT-PT Instruction Manual

1. Electrical configuration
The Neutrik ”Easy Patch” Patch Panel is fitted with high quality, long life NJ3TTA gold plated
double contact jacks (2 x 48). This Patch Panel is an innovative and compact patching system(just 1 U high) for 19” rack mounting. Robustly housed in black coated steel shell and featuring
precision aluminum fittings it is built to last. The Neutrik "Easy Patch” is suitable for analog anddigital audio signals.
The ”Easy Patch” is available in five normalling configurations (fully loaded).
•••••half normalled bottom row
half normalled top row
full normalled
parallelisolated

Configuration Chart

Furthermore individual jack pairs can be changed to combine various normallings within one
panel quickly and without fuss. This is even possible while the panel is "on air". For this we offer
pre-configured jack pairs (NJ3TTA-4-*).
In case of emergency the normalling for individual jack pairs can be changed by the use ofnormalling bars. Normalling bars to change the normalling of 4 channels are included.

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2. Replacement of Jack Pairs
Each individual jack pair can be exchanged quickly and without fuss even while the panel is "onair". For replacement simply remove the easy accessible jack pairs.

Module consisting of 2 Jack Pairs

Remove Front Panel by unscrewing the 3 black cross-recessedscrews (M3x8 Taptite), remove the two side-stops.

Push out the channel identification strips.

Pull one module out of the casing using the supplied
disassembling pliers

Alternatively the jack pairs may be pulled out by the use of two
Bantam plugs (diagonally plugged in).

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The two jack pairs have to be re-assembled in the right way sothat the thicker body marked “left” is put on the left side withthe mark outside and readable.

To complete, push the new jack pairs into the casing again with the mark on the left side (Ifmore than one module are removed always assemble from the center to the right or left sideand be careful that the keys on the left side of the jack pairs find their guiding slots. If all jackpairs are removed start at the casing support in the center and assemble to the right and leftside). Slide in again the channel identification strips (best from the outside inwards) and fix thefront panel with the black cross-recessed screws. Don’t forget to insert the side-stops before
fixing the screws (see page 10).

3. Reconfiguration by hand
Please note, in case of emergency the normalling can by changed by hand by the use ofnormalling bars. For easy and safe modification work we recommend our preconfigured jackpairs (NJ3TTA-4-*).

The two jack pairs are separated by spreading apart the rearparts to unlock the fixing mechanism till it is possible...

...to slide the jack pairs against each other in axial direction.

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NPPA-TT-PT Instruction Manual

Then remove the cover with a tiny grip at the side and carefully

Pull out the configuration bars you need to exchange(preferably using a small screw-driver).

Insert new bars carefully by pressing them in parallel at bothends.
Attention: To ensure best contact conditions never reuse theconfiguration bars once being put in place! Always take new
ones! Keep the contacts and switches in place with the thumbwhile manipulating the normalling contacts.

Finally snap on the cover (Insert it first at one side and thensnap slightly into the opposite groove with a light pressure on
the nose).

4. Grounding variations
The flexible grounding system provides the following versions:Individual:Group:

Central:Chassis-Common:

Each channel is individually grounded by its corresponding cable shield(default configuration).
Selected channel grounds are connected via the ground bus on thePCB using solder bridges and track cuts to form a group that isconnected to one common cable shield.
All channel grounds (individual top and bottom row) are connected viathe ground bus on the PCB using solder bridges and wired with only
one cable shield.
The same as central grounding but with the addition of the common
ground bus (top and / or bottom rows) connected to the patch panel
chassis by means of jumpers.

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Grounding Variations (PT version)Common Signal Ground
Top Row
Chassis Ground

Soldering Pads
to connect
Individual Grounds to Common Ground

Common Signal Ground
Bottom Row

Jumper Setting for Group, Central & Chassis Common

Common Signal Grounds ofTop and Bottom Row separated

Common Signal Ground Bottom Row
connected to Chassis Ground

Arrangement

Common Signal Ground Top Row
connected to Chassis Ground

Push Terminals

Common Signal Ground Top and Bottom Row
connected to Chassis Groundedge of PCB

Common Signal Ground of Top and Bottom Row
connected together and separated from Chassis Ground... Needed Jumper Position for certain Grounding... Position has no Influence to the Grounding

Position of Pin-Header on PCB

Grounding Variations

Pin Header

NOTE: In standard configuration there is no ground connection between top and bottom row
unless it is provided by an inserted patch cable. If this is required, as in the case ofphantom powered microphone lines, either make an internal connection by individuallywiring the corresponding upper and lower ‘S’ terminals, or if the latter is critical withrespect to possible ground loops make the connection via patch cable instead of using
the normalling feature.

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5. Wiring
For access to the terminals remove the top- and bottom-cover with three cross-recessed screws(M2.5x8) each fixed in a triangle.

Rear front for wiring

Spring loaded push-terminals with gas tight connection enable fast and easy wiring. NOsoldering or fixing with screws is necessary.
Simply insert the stripped wire (6 mm) after pressing down the white key with a screwdriver.
Color coding of terminals:

OrangeBlack
White

–––

Tip (signal +)Ring (signal -)Sleeve (shield)

The terminal will handle solid and stranded wire up to 20AWG (0.5 mm2). Solid wires up to18AWG (0.75mm2) are possible.
Wiring with spring loaded push terminals (PT)

TipRing

Page 8 of 13Sleeve

NPPA-TT-PT Instruction Manual

6. Cable retention to the unit
The built in cable retention bar is at the back of the casing. Simply attach the cables with cableties to the bar as shown in the photo.
For large and heavy bundles there is an additional strain relief bar NPPA-S available. It is
attached to the casing with four screws.

Cable Retention Bar

7. Channel identification
The front panel is equipped with channel identification strips located in the center of thechannels and marked with the channel numbers 1-24 and 25-48 respectively.

Channel identification strips

Labeling strips

For the perfect management of the system and for individual identification according tocustomer’s needs there are two large and separate labeling strips, one for the bottom and one
for the top row.
To write on the paper you have to unscrew one of the outer fixing screws of the front panel.
Then pull out the side-stop, the transparent foil and the paper strip itself.
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After marking is done assemble the parts in reversed sequence.

Remove labeling strip

Side Stop

NOTE: For easy and perfect marking you can use our designation software “PatchLabel”
which is available on our web site www.neutrik.com free of charge.

Print-Out software “Patch Label”

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NPPA-TT-PT Instruction Manual

8. Technical data
8.1 ElectricalFrequency range:
Digital suitability:
Channel separation:
Insulation resistance:
Connector contact resistance:
Switch contact resistance:
Dielectric strength:

DC to > 50 MHz
Digital audio acc. to AES/EBU> 100 dB @ 10 kHz, 600 Ω terminated> 40 dB @ 6 MHz , 110 Ω terminated> 109 Ω @ 500 V dc
< 20 mΩ< 25 mΩ1000 V dc

7.2 Mechanical
Lifetime:
Insertion / Withdrawal force:
Cable retention force:
Dimensions (rack mount):
Depth:
Weight:Temperature range:> 5.000 Insertion / withdrawal cycles< 10 N / > 8 N
70 N max per cable retention bar
482 mm (W) × 44 mm (H) (19” × 1 U)
178 mm (7”)
2.9 kg-30°C to +80°C

7.3 Materials
Jack housing:Jack contacts:
Casing:Front Panel:

PA 66 blend
CuSn6 – TRIBOR® plated (0.2 µm AuCo over 2 µm NiP)
Steel and aluminum, black coated
AlMgSi 0.5 F22

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9. Wiring Diagram

Wiring diagram

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10. Ordering Information
Patch Panels
Part Number
Description
NPPA-TT-PT
2 x 48 jacks
NPPA-TT-PT-FN 2 x 48 jacks
NPPA-TT-PT-HNT 2 x 48 jacks
NPPA-TT-PT-I
2 x 48 jacks
NPPA-TT-PT-P
2 x 48 jacks* fully loaded jack pairs only

Configuration*
half normalled bottom
full normalled
half normalled top row
isolated
parallelPre-configured Jack-Pairs
Part Number
Description
NJ3TTA-4-HNB blocks of 2 channels
NJ3TTA-4-HNT blocks of 2 channels
NJ3TTA-4-FN
blocks of 2 channels
NJ3TTA-4-P
blocks of 2 channels
NJ3TTA-4-I
blocks of 2 channels
Accessories
NPPA-S
NKTT*
NPPA-NB

Wiring288 push terminals
288 push terminals
288 push terminals
288 push terminals
288 push terminals

Configuration*
half normalled bottom row
half normalled top row
full normalled
parallelisolated

Groundingindividual
individual
individual
individual
individual

cover ident color: clear
cover ident color: yellow
cover ident color: green
cover ident color: redcover ident color: orange

Strain Relief bar
Patch cords with NP3TT-1 plugs. Available in black, blue, green, red andyellow. Lenght: 30, 40, 60, 90, 120 cm
Normalling bars for changing the normalling of all 48 channels

Standard supply
The compact Neutrik "Easy Patch” NPPA-TT-PT consists of:••
•
•
•
•

•
•

Black coated steel casing with aluminum fittings
2 x 48 highly integrated Neutrik NJ3TTA jacks with gold plated double contacts and speciallydesigned normalling mechanism (standard: half normalled bottom row)
Integrated internal pre-wiring with selectable flexible grounding system
Spring loaded push terminal blocks2 Built–in cable retention bars
Spare normalling configuration bars
4 Normal 1 : “short”, bridges 5 contacts
8 Normal 2 : “medium”, bridges 6 contacts
4 Normal 3 : “long” , bridges 7 contacts
1 Disassembling pliers
1 Instruction Manual

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