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maxon EC motor
Operating Instructions
Order Number: 350795, 350776, 350796, 350778, 350794, 349694, 370413, 370412, 350834, 350804,
350835, 350805, 350806, 349731, 370416, 370415
The EC 20 flat motor with integrated electronics is a brushless, speed-controlled 1-quadrant drive. The EC 20 flat
can be supplied in a 2 watt or 5 watt version.
Functions:
•
Commutation with Hall sensors
•
Digital speed control
•
Speed range: 200 rpm - 7000 rpm (depends on version)
•
Current restriction fixed
•
Overvoltage and undervoltage switch-off
•
Overvoltage protection
•
Blockage protection, temperature monitoring
•
Inverse polarity protection
2-wire version
•
Speed proportional to input voltage
5-wire version
•
Set value speed target through analog signal 0 ... 10 V
•
2-wire operation possible
•
Versions:
- «Enable» TTL level compatible
- Direction pre-selection «cw/ccw» TTL level compatible
•
Speed monitor supplies frequency signal proportional to speed
Table of contents
1
Safety instructions ....................................................................................................................................... 2
2
Technical data .............................................................................................................................................. 3
3
Minimum external wiring .............................................................................................................................. 7
4
Description function of inputs and outputs 5-wire version ......................................................................... 10
5
Description function of 2-wire version ........................................................................................................ 13
6
Protective functions.................................................................................................................................... 14
7
Installation instructions .............................................................................................................................. 15
8
EMC-compliant installation ........................................................................................................................ 15
9
Trouble shooting ......................................................................................................................................... 16
10
Dimensions ................................................................................................................................................ 17
11
Glossary..................................................................................................................................................... 18
These instructions are available on the Internet as a PDF file at www.maxonmotor.com, under "Service & Down-
loads". Doc. no. 903155_PDF_E.
maxon motor
EC 20 flat with integrated electronics
Doc. no. 903155
Edition September 2010
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Summary of Contents for maxon motor EC 20
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Page 1: Table Of Contents
Order Number: 350795, 350776, 350796, 350778, 350794, 349694, 370413, 370412, 350834, 350804, 350835, 350805, 350806, 349731, 370416, 370415 The EC 20 flat motor with integrated electronics is a brushless, speed-controlled 1-quadrant drive. The EC 20 flat can be supplied in a 2 watt or 5 watt version. -
Page 2: Safety Instructions
Skilled personnel Only skilled, experienced personnel should install and start the equipment. Statutory regulations The user must ensure that the EC 20 flat with integrated electronics and the components belonging to it are assembled and connected according to local statutory regulations. -
Page 3: Technical Data
Operating Instructions EC 20 flat with integrated electronics 2 Technical data 2.1 Order number 350795 (IP40), 350776 (IP00) 2-wire version, nominal speed 3000 rpm, 2 Watt 350796 (IP40), 350778 (IP00) 2-wire version, nominal speed 6000 rpm, 2 Watt... - Page 4 EC 20 flat with integrated electronics Operating Instructions n [min 7000 set value = 10V 6000 5000 4000 set value = 5V 3000 2000 1000 set value = 1V M [mNm] Picture 3: Operating range n = f (M) 5-wire version, order number 350794 and 349694, 370413, 370412 If the supply voltage is reduced, the torque and/or speed may change.
- Page 5 Operating Instructions EC 20 flat with integrated electronics n [min 8000 Vcc = 28V 7000 Vcc = 24V 6000 5000 Vcc = 18V 4000 Vcc = 12V 3000 Vcc = 10V 2000 1000 M [mNm] Picture 5: Operating range n = f (M)
- Page 6 EC 20 flat with integrated electronics Operating Instructions 2.6 Mechanical data (preloaded ball bearings) Version 2 Watt 5 Watt Rotor inertia Axial play at axial load < 2 N > 2 N 0.14 0.14 Radial play preloaded preloaded Max.
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Page 7: Minimum External Wiring
Operating Instructions EC 20 flat with integrated electronics 3 Minimum external wiring 3.1 5-wire version Supply voltage 10 ... 28 VDC Supply voltage Set value «Enable» or «cw» 10 ... 28 VDC Speed 2.4 ... 28 VDC Supply voltage 0 ... - Page 8 0.0 ... 0.8 VDC maxon motor 10k / 0.1 W 14k / 0.1 W EC 20 flat with integrated electronics Operating Instructions Values for 24 VDC operating voltage Supply voltage 10 ... 28 VDC «Enable» or «cw» if closed «Disable» or «ccw» if open 14k / 0.1 W...
- Page 9 «ccw» 0.0 ... 0.8 VDC maxon motor Operating Instructions EC 20 flat with integrated electronics Version direction «cw/ccw»: the direction of rotation can be selected at the grey wire. Supply voltage 10 ... 28 VDC Supply voltage 10 ... 28 VDC «cw»...
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Page 10: Description Function Of Inputs And Outputs 5-Wire Version
EC 20 flat with integrated electronics Operating Instructions 4 Description function of inputs and outputs 5-wire version 4.1 Set value speed input Motor speed is set with an analog voltage at the set value speed input. The set value speed input is protected against overvoltage. - Page 11 Operating Instructions EC 20 flat with integrated electronics Speed [rpm] 6’480 6’000 3’000 Operating voltage [V] 10.0 10.8 0.17 0.33 Picture 16: Speed as function of specified set value voltage. Option By connecting (short-circuiting) the two wires speed monitor (green wire) and set speed value (white wire), control is set into 2-wire operating mode.
- Page 12 EC 20 flat with integrated electronics Operating Instructions 4.3 «Enable» and direction version «cw/ccw» The output stage is activated with the speed set value input. The output stage is activated if the speed set value is higher than 0.17 V. The «cw/ccw»...
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Page 13: Description Function Of 2-Wire Version
Operating Instructions EC 20 flat with integrated electronics actual Frequency at speed monitor output Monitor n Direction «cw/ccw» actual Monitor n actual Monitor n grey Frequency at speed monitor output [Hz] target Monitor n actual Monitor n target... -
Page 14: Protective Functions
The power stage is switched off if the supply voltage V falls below approx. 8.5 V to prevent the EC 20 flat with integrated electronics operating off the specification. As soon as the supply voltage exceeds the restart threshold of approx. 9 V, the EC 20 flat with integrated electronics is ready for operation. -
Page 15: Installation Instructions
8.1 Cable length < _ 300 mm – Normally no shielding is required. – Star wiring recomended if several EC 20 flat with integrated electronics are supplied by a common supply voltage. 8.2 Cable length > 300 mm – The voltage drop in the connection cable must be minimised by choosing a large enough wire cross section. -
Page 16: Trouble Shooting
EC 20 flat with integrated electronics Operating Instructions 9 Trouble shooting 9.1 2-wire version – Is the supply voltage set between 10.0 and 28.0 VDC? – Is the supply voltage connected to the red and black wire and switched –... -
Page 17: Dimensions
Operating Instructions EC 20 flat with integrated electronics 10 Dimensions 10.1 2 Watt Version IP 40 IP 00 Picture 21: Dimensional drawing 2 Watt Version 10.2 5 Watt Version IP 40 IP 00 Picture 22: Dimensional drawing 5... -
Page 18: Glossary
EC 20 flat with integrated electronics Operating Instructions 11 Glossary 1-Q speed controller The motor produces positive torque in the selected or programmed direction. The load is not actively dece- lerated when the speed set value is reduced or the direction changed (direction pre-selection version).
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