LNDR MIDI Line Driver
Product Information
Specifications:
- Product Name: LNDR MIDI Line Driver
- Units: Main & Secondary Pair
- Power Source: Mains Adaptor
- Cable Compatibility: CAT5, CAT5e
- Maximum Cable Length: 100 meters
Product Usage Instructions:
1. Introduction
The LNDR MIDI Line Driver comes as a pair of units with MIDI
Input and Output at both ends, allowing you to connect MIDI devices
over longer distances than standard MIDI cables permit.
2. Connecting
– Use MIDI cables up to 5 meters in length for the MIDI INs of
the LNDR.
– Connect MIDI INs directly from the signal source, not at the
end of a chain of THRUs.
– Do not connect the CAT5 or CAT5e cable from a main unit to
another main unit; only connect it to a secondary unit.
3. Powering and LED Indicators
– The LNDR system is powered by a mains adaptor, eliminating the
need for battery changes.
– Each unit has a green LED that indicates power status and
flashes when MIDI data is received.
4. CAT5 Cable Information
– For distances up to 100 meters, both stranded and solid copper
core cables are suitable.
– For distances over 100 meters, use 24 AWG solid copper core
CAT5e cable.
– Copper Clad Aluminium (CCA) cable can be used up to 100 meters
but is not recommended.
FAQs:
Q: Can I use standard MIDI cables with the LNDR?
A: The LNDR is designed for use with CAT5 or CAT5e cables for
extended distances. It is recommended to use appropriate Ethernet
cables for optimal performance.
Q: How do I know if the units are receiving power?
A: Each unit is equipped with a green LED that will be lit when
the unit is powered. The LED will flash when MIDI data is being
received.
LNDR
MIDI Line Driver – main & secondary pair
Operating manual
FCC STATEMENT FOR LNDX MIDI Line Driver:
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
· Reorient or relocate the receiving antenna. · Increase the separation between the equipment and receiver. · Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. · Consult the dealer or an experienced radio/TV technician for help.
WEEE DIRECTIVE
(applies to the European Union & other European countries with separate collection systems)
The crossed-out wheelie bin symbol affixed to this product indicates that it should not be disposed of with other household wastes at the end of its working life. To prevent possible harm to the environment or to human health from uncontrolled waste disposal, please separate this from other types of wastes and recycle it responsibly to promote the sustainable re-use of material resources.
Household users should contact either the retailer where they purchased the product, or their local government office for details of where and how they can take this item for environmentally safe recycling. Business users should contact their supplier and check the terms and conditions of the purchase contract. This product should not be mixed with other commercial wastes for disposal.
For disposal in countries outside of the European Union This symbol is only valid in the European Union (EU). If you wish to discard this product, please contact your local authorities or dealer and ask for the correct method of disposal.
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Introduction
The LNDR MIDI Line Driver is supplied as a pair of units with a MIDI Input and a MIDI Output at both ends to enable you to connect MIDI devices to each other over much greater distances than is usually possible using standard MIDI cables.
A MIDI signal applied to the MIDI IN of the main unit will appear at the MIDI out of the secondary unit. Similarly, a MIDI signal applied to the MIDI IN of the secondary unit will appear at the MIDI out of the main unit. You can send signals in both directions at the same time.
The main and secondary units are very similar, however the main unit supplies power for both units the secondary unit does not have a power input socket.
The LNDR system is powered by a mains adaptor (supplied), so it doesn’t need periodic battery changes to keep it working, enabling you to “fit and forget”.
Connecting
Ensure that the power adaptor is plugged in to the main unit, and the ACTIVE LEDs on the LNDR main & secondary units are both on. Ensure you have a CAT5 cable connecting the main unit to the secondary unit. Connect the MIDI out of your keyboard or computer to the MIDI IN of the LNDR main unit and connect the MIDI OUT of the LNDR secondary unit to the MIDI input of the device you want to control. Alternatively connect the MIDI out of your keyboard or computer to the MIDI IN of the LNDR secondary unit and connect the MIDI OUT of the LNDR main unit to the MIDI input of the device you want to control.
If possible, use MIDI cables no greater than 5 metres in length for the MIDI INs of the LNDR. The MIDI INs should ideally be driven direct from the signal source, not at the end of a daisy chain of THRUs. If necessary, use a thru box such as the THRU-5.
Please note that LNDR is not an Ethernet device. The CAT5 or CAT5e cable from an LNDR main unit should only be connected to an LNDX or LNDR secondary unit, not to another main unit, and neither the main nor secondary units should EVER be connected to any other device (except LNDR or LNDX), even if it has a similar connector. (e.g. Ethernet router, switch or hub).
LEDs
There is a green LED on each of the main and secondary units. The LED will be lit if there is power to the unit. When MIDI data is presented to each unit, its LED will flash.
CAT5 cable info
You should use good quality CAT5 cable. For distances greater than 100 metres you should use CAT5e cable. Ideally use ready-made CAT5 cables which are available in many lengths, however if you wish to make you own, it is vital that the cable pairs are connected to the correct pins. It is not sufficient that pin 1 connects to pin 1 (2-2, 3-3 etc.), it is also essential that pin 1 is paired with 2, 3 with 6, 4 with 5, and 7 with 8. You will find that the twisted pairs have complementary colours, white/orange with orange/white etc. Cables should be wired to the EIA-568B standard at both ends. Don’t use crossover cables. You can find out more about CAT5 wiring on the internet. Search for “straight through RJ45”.
For distances up to 100 metres, either stranded or solid copper core cables can be used. For distances over 100 metres, 24 AWG solid copper core CAT5e cable should be used.
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Copper Clad Aluminium (CCA) cable can be used up to 100 metres, but is not recommended.
Although we recommend wiring to the EIA-568B standard, the CAT5 cable can alternatively be wired to the EIA-568A standard. Whichever you choose, both ends must be wired to the same standard.
Troubleshooting
Check that you are using a properly wired CAT5 cable see above. Check that you are using a “straight through” cable, not a “crossover” cable. Check that the “active” LEDs are lit.
If you encounter problems at very long distances, it could be the result of volt-drop in the CAT5 cable, in which case substituting the power supply for a 12v regulated unit will help. Note that we have tested the LNDR system to over 1100 metres using the supplied 9V PSU without problems.
Specification
Power Input Power MIDI Interconnect Protocols Range
Weight Dimensions Power supply
9V to 12V DC (regulated or unregulated) 85mA, 2.1mm plug (centre positive) 1 x In, 1 x Out on each unit (standard 5 pin DIN connectors) CAT5 cable required with RJ45 connectors MIDI and RS485 full duplex 1000 metres between main & secondary units over 24AWG solid copper core CAT5e cable (500 metres for serial numbers below 2876) 110g (each unit, excluding power supply) 100 x 46 x 32 mm (each unit) supplied with a 9v regulated multi-region power supply which is suitable for use in the UK, EU, US/Canada, Japan and AUS/NZ.
Warranty
The LNDR MIDI Line Driver comes with a 12 month (from purchase date) back to base warranty, (i.e. customer must arrange and pay for carriage to and from Kenton Electronics Ltd). In the unlikely event of a problem, contact us by email through our website or by telephone.
Unit 3, Epsom Downs Metro Centre, Waterfield, Tadworth, KT20 5LR, UK
+44 (0)20 8544 9200
www.kenton.co.uk
tech@kenton.co.uk
Version 1v11
e. & o. e. © 4th April 2025
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Documents / Resources
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KENTON LNDR MIDI Line Driver [pdf] Instruction Manual LNDR-1v11, K1300038, LNDR MIDI Line Driver, LNDR, MIDI Line Driver, Line Driver |