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Page 3 of 13 

NPPA-TT-SD25 Instruction Manual

1. Electrical configuration 

 
The Neutrik ”Easy Patch” is fitted with high quality, long life NJ3TTA double contact jacks (2 x 
48) with drastically improved contact integrity. The NJ3TTA double contact jacks are gold plated 
and prewired. The Neutrik ”Easy Patch” is an innovative and compact patching system (just 1 U 
high) for 19” rack mounting. Robustly housed in black coated steel casing and featuring 
precision aluminum fittings it is built to last. The Neutrik ”Easy Patch” is suitable for analog and 
digital audio signals. 

The new generation of the Neutrik ”Easy Patch” is easily programmable for any out of five 
electrical configurations: 

  half normalled bottom row 

  half normalled top row 

 full 

normalled 

 parallel 

 isolated 

 

The programming feature allows to set all possible switching configurations inside the jack pair 
with a specially designed mechanism and individually for each channel. 

 

 

Configuration Chart 

 

The standard configuration on ”Easy Patch” NPPA-TT-SD25 is half normalled bottom row. 
Modules NJ3TTA-4-.x. consisting of two “Plug-in Units” (or four jacks NJ3TTA) with 
prefabricated normalling are also available. 

Summary of Contents for NPPA-TT-SD25

Page 1: ...983 811 441 Tel 1 732 901 9488 Tel 81 3 3663 4733 Tel 33 1 4131 6750 Tel 49 8131 28 08 90 Fax 423 232 53 93 Fax 41 44 736 5011 Fax 44 1983 811 439 Fax 1 732 901 9608 Fax 81 3 3663 4796 Fax 33 1 4131 0511 Fax 49 8131 28 08 30 www neutrik com Draft Nr BDA206 Update 17 01 2008 Data subject to change without prior notice 2007 NEUTRIK ALL RIGHTS RESERVED INSTRUCTION MANUAL NPPA TT SD25 PATCH PANEL Easy...

Page 2: ...cement of Jack Pairs 4 3 Reconfiguration by hand 5 4 Grounding variations 7 5 Wiring 8 6 Cable retention to the unit 9 7 Channel identification 10 8 Technical data 11 9 Wiring Diagram 12 10 Ordering Information 13 Dimensional Drawing NPPA TT SD25 Front panel Cable retention bar Top cover ...

Page 3: ...uilt to last The Neutrik Easy Patch is suitable for analog and digital audio signals The new generation of the Neutrik Easy Patch is easily programmable for any out of five electrical configurations half normalled bottom row half normalled top row full normalled parallel isolated The programming feature allows to set all possible switching configurations inside the jack pair with a specially desig...

Page 4: ...on air For replacement or re configuration just remove the easy accessible module consisting of two Plug in Units Module consisting of 2 Jack Pairs Remove Front Panel by unscrewing the 3 black cross recessed screws 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 ...

Page 5: ... the left side of the jack pairs find their guiding slots If all jack pairs are removed start at the casing support in the center and assemble to the right and left side Slide in again the channel identification strips best from the outside inwards and fix the front panel with the black cross recessed screws Don t forget to insert the side stops before fixing the screws see page 10 3 Reconfigurati...

Page 6: ... small screw driver Insert new bars carefully by pressing them in parallel at both ends Attention To ensure best contact conditions never reuse the configuration bars once being put in place Always take new ones Keep the contacts and switches in place with the thumb while manipulating the normalling contacts Finally snap on the cover Insert it first at one side and then snap slightly into the oppo...

Page 7: ...nel offers individual grounding floating channel For grounding grouping options solder pads are offered Jack pairs have to be removed Each Sub D group is configured by its own jumper block The flexible grounding system provides the following alternatives to choose from Chassis Common All channel grounds top bottom row are connected via PCB and jumpers to the patch panel chassis Sub D Group Central...

Page 8: ... In the case it is required to patch phantom powered microphones all of the shields SLEEVE contacts from this device must be tied together This can be accomplished by grouping the grounds of these channels via the PCB bus using solder bridges This group is then connected onto the general technical ground Because of the missing SLEEVE normalling contact it is necessary to wire internally the ground...

Page 9: ...pinout is equivalent to Tascam DA 88 Analog I O printout Rear front for wiring 6 Cable retention to the unit The built in cable retention bar is at the back of the casing Simply attach the cables with cable ties to the bar 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 ...

Page 10: ... system and for individual identification according to customer 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 After marking is done assemble the parts in reversed sequence Remove...

Page 11: ...40 dB 6 MHz 110 Ω terminated Insulation resistance 10 GΩ 500 V dc Connector contact resistance 20 mΩ Switch contact resistance 25 mΩ Dielectric strength 1000 V dc 8 2 Mechanical Lifetime 5 000 Insertion withdrawal cycles Insertion Withdrawal force 10 N 8 N Cable retention force 70 N max per cable retention bar Dimensions rack mount 482 mm W 44 mm H 19 1 U Depth 178 mm 7 Weight 2 2 kg Temperature r...

Page 12: ...Page 12 of 13 NPPA TT SD25 Instruction Manual 9 Wiring Diagram Example channel 1 to 8 the other channels are identical ...

Page 13: ...t bridges 5 contacts 96 Normal 2 medium bridges 6 contacts 48 Normal 3 long bridges 7 contacts 1 Disassembling pliers 1 Instruction Manual 10 2 Options and Accessories Order Information for Pre configured jack pairs and Accessories NJ3TTA 4 HNB blocks of 2 channels half normalled bottom row cover identification color clear NJ3TTA 4 HNT blocks of 2 channels half normalled top row cover identificati...

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