ED705 Skiff-friendly Powered Busboard

Horizontal and Vertical Module Connector Options

Horizontal 3D Vertical 3D

The ED705 is a passive busboard incorporating a dual linear regulator power supply providing +12V @ 1.5A and -12V @ 1.0A and 12 module power outlets.

The ED705 has the same dimensions as its predecessor, the ED126, allowing it to neatly fit in to a 3U 42HP section of your system.

The ED705H uses right-angle IDC connectors which not only makes it ideal for shallow skiffs, but they also make insertion of cables easier. And the ED705 is equally at home in deeper systems with the option of the ED705V which has vertical IDC connectors.

The ED705 has +/-12V power connections at both ends allowing multiple ED704 boards to be daisy-chained to support any sized system. A different approach to the design of the distribution rails within the ED705 offers improved performance in multi-board systems with minimal signal loss across the length of the run and enhanced noise immunity. The enhanced design eliminates the need for bulky heatsinks, further enhancing the low-profile design of the board.

The ED705 requires an external 15VDC supply with a nominal rating of 2.4A. "loop-in-loop-out' 15V terminals allow multiple ED705 to be installed in systems requiring large power capacity.

When installing multiple ED705's in a system to increase the overall system loading capacity, the user should be aware that each ED705 must still be limited to within its maximum loading. So, for example, if you have 2x ED705 to give you as +12V 2.5A capacity, you must spread your modules between the ED705's so that neither of them is loaded beyond its 1.5A capacity. This will usually require you to study the power loading figures for each module and totalise the loadings for the modules connected to an ED705.


The ED705 has 3 sets of power in/out terminals, the ones at each end of the PCB are for connecting to passive busboards such as our ED704. Either set can be used to feed power in to the ED704. The other set can then be used to conenct to an additional ED704 if needed.

The 3rd set of terminals at the centre of the PCB are for connection to an external 15VDC supply. either pair of terminals can be used for power in to the ED705. The other pair then being available to feed power to a 2nd ED705 if needed. .

Two 5V terminals, one at each end of the PCB allow an external 5V power source to be connected. The 2nd 5V terminal can then be used to feed to another busboard. If using our EURO5V with [BusBoardENabled] then 5V will be present on these two terminals in which case you must NOT connect an external 5V supply. We also recommend NOT using the 5V terminal to connect to another busboard whilst using the EURO-5V.

Wiring Diagram


205mm x 101mm
Plan View
Drilling Details

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Copyright 2000. All rights reserved.     Revised: October 1, 2019