Shimano Di2 distributor Junction A | SM-EW90 intern | external
This distribution takes on the leads of Shifters and bundles them in a battery for outgoing cable.
There are two versions:
- SM-EW90A has 3 ports and connects the shift lever to the distributor Junction B.
- SM-EW90B or SM-EW90F has 5 ports and connecting lever, Junction B wired and
Cycling Computer SC-R770 via radio
The three inputs are used to connect the manifold STIs with the Junction B. Since the brake / shift lever can be connected each have 3 separate entrances so in addition to the total STIs 4 more gear knobs. For example, are positioned a switch button on the top link and lower link.
SM EW90B / SM EW90F
With a total of 5 inputs all 8 or 4 per side switching components of the Di2 groups can be connected:
- Brake / shift lever (STI)
- Lower link switch button
- Top link switch button
- Time Trial shifter or time trial brake / shift lever
Simultaneously, the Junction A unit can not be connected to the computer Shimano SC-R770 with the cycling computer via ANT + radio. This then provides a Üersicht of important information such as battery status, engaged gear and can be coupled with other ANT + devices.
To use the SM-EW90B / SM EW90F units but the cycling computer is not required. Likewise, the full configuration with 8 switching component is optional!
Compatibility: Dura Ace Di2 9070 | Ultegra Di2 6770 | XTR Di2 M9050
Weight: 12 g
Delivery: 1x Distributor + fastening strap / clip
Note: The designation SM-EW90B is conducted in many technical documents of Shimano as SM EW90F. The product was, however, revised and will therefore now run as SM EW90B! Both devices are fully to each other and to the components of the Dura Ace Di2 9070 group compatible!