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E-WERK 
Bike-mobile hub dynamo powered supply unit for electronic devices

Instruction manual. Please study carefully before using E-WERK!

Capable of powering small electronic devices – e.g. mobile phone, MP3 player, GPS (also 12 V models for 
cars) – or of charging batteries – NiCd, NiMh, Li and Pb. Translates energy created created by the hub 
dynamo.

CAUTION:

 Busch & Mueller vouches solely for a faultless functioning of the E-WERK. Exempt from liability is 

any damage to connected devices of all kinds. It cannot be guaranteed that the E-WERK is able to power all 
connectable devices. For example, some mobile devices only use their internal battery during operation and 
cannot be charged at the same time, also not by the E-WERK. Please contact the device’s manufacturer for 
information! However, the E-WERK is able to charge an external battery, e.g. our buffer battery 461A (not 
included). With it, such devices can be recharged after the trip. Other rare exceptions are devices whose 
technical properties prevent them from being charged while riding the bike because of voltage fluctuations. 
They, too, can be powered by the E-WERK using an adequate buffer battery. Further information can be found 
on our website 

www.bumm.de

Contents

E-WERK, splash and rain water proof (1)
3 plastic pens for control dials (2)
3 rubber bands (3)
4 cable straps (4)
1 connection cable for dynamo (80 cm) (5)
1 extension cable (100 cm) (6)
1 cable with USB socket (19.5 cm) (7)
1 cable with Mini-USB plug (19.5 cm) (8)
1 cable with Micro-USB plug (19.5 cm) (9)
2 free cables for connecting custom plugs (10)
2 caps for plug connections (11)
1 plug (casing and inner part) for Shimano hub dynamo (12)
2 flat connectors for SON hub dynamo (13)
2 heat shrink tubes for SON flat connectors (14)

Mounting on a bike

The E-WERK can be fastened to a large variety of frame tubes in any suitable place by using rubber bands (3) or 
cable straps (4). The E-WERK is splash and rain water proof!

Mounting with cable straps: Pull one cable strap each through the opposed slots in the fixing bracket, guide them 
around the frame tube and tighten.

Without mounting: The E-WERK can be carried in any bag that allows a cable connected to the hub dynamo to 
exit. In this case, the fixing bracket can be removed.

Connection to a dynamo/power source

The E-WERK works with all hub and tire driven dynamos without electronic voltage limitation. Connected to 
dynamos with integrated limitation, the E-WERK can give off a maximum of 7 V.

Connect E-WERK to the dynamo with the bared ends of the connection cable (5) (see the following connection 
options). Connect the other end to the input (IN) of E-WERK (remove cap from plug connection first). By 
tightening the screw caps, those connections can be made splash and rain water proof!

Connection options

 

1

Summary of Contents for E-werk

Page 1: ...for control dials 2 3 rubber bands 3 4 cable straps 4 1 connection cable for dynamo 80 cm 5 1 extension cable 100 cm 6 1 cable with USB socket 19 5 cm 7 1 cable with Mini USB plug 19 5 cm 8 1 cable with Micro USB plug 19 5 cm 9 2 free cables for connecting custom plugs 10 2 caps for plug connections 11 1 plug casing and inner part for Shimano hub dynamo 12 2 flat connectors for SON hub dynamo 13 2...

Page 2: ...rity of the headlight the E WERK has no set polarity Picture 4 Other dynamos also side runners Connect the cable of the dynamo together with the headlight cable parallel connection Other power sources e g E Bike car The E WERK input can also take continuous current up to 50 V Therefore you can also use E Bike batteries or car cigarette lighters 12 V as power sources Connecting electronic devices a...

Page 3: ...polarity of the output voltage when using self tailored cables When powering a device the output voltage of the E WERK is always to be set to the value that is noted on the input socket of the device on the power supply unit or in the instruction manual of the device This value is usually stated in connection with one of the following terms secondary SEC output OUT or similar If this voltage value...

Page 4: ... 6 V With these values overcharging is not possible Caution These values only apply to batteries without a charging electronic Too high voltage can lead to the destruction of the connected battery If more than one cell are connected serially during charging all cells must have the same build capacity and charge state The output current of the E WERK should not be set higher than the value stated o...

Page 5: ... after dark Technical details Ref no 361 IN 0 to 40 V AC voltage 0 to 100 kHz Soft limitation at 50 V peak voltage 0 to 50 V DC voltage no polarity has to be considered OUT voltage and current limiting short circuit proof reverse polarity proof Output max 16 W Idle output 0 03 W at 30 km h Charge time non binding at approx 15 km h comparable to charging with standard mains connected chargers Versi...

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