Baumer GEMMH Benutzerhandbuch
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G0AMH, G0LMH, G0MMH
GBAMH, GBLMH, GBMMH
GEMMH
Absolute Encoder – Profibus
9-16
Assembly Instructions
GB
Danger
Warnings of possible danger.
General instructions
Information on appropriate product handling.
General remarks
Additional information
The installation instruction is supplementary to already
existing documentation (e.g. catalog, data sheet, manual).
It is imperative to read the manual carefully prior to star-
ting the device.
Appropriate use
- The encoder is a precision measuring device. It is ex-
plicitly designed for registration of angular positions
and revolutions as well as evaluation and supply of
measuring values as electric output signals for the sub-
sequently connected device. The encoder must not be
used for any other purpose.
Start up
- Installation and assembly of the encoder only by electri-
cally skilled and qualified personnel.
- Consider also the operation manual of the machine
manufacturer.
Safety instructions
- All electrical connections are to be revised prior to star-
ting the system.
- Incorrect assembly and electrical connections or any
other inappropriate work at encoder and system may
lead to malfunction or failure of the encoder.
- Any risk of personal injury, damage of the system or
company equipment due to failure or malfunction of the
encoder has to be eliminated by corresponding safety
measures.
- Do not operate encoder beyond the limit values stated
in the data sheet.
Any disregard may lead to malfunctions, material damage
and personal injury.
All movable adjusting elements need tolerance in both
axial and radial direction in order to equalize shifts by tem-
perature and of mechanical nature. Tighten both fixing and
clamp ring screws firmly.
Electrical installation
- Do not modify encoder in any electrical way and carry
out any wiring work under power supply.
- Any electrical connection and plugging-on whilst under
power supply is not permitted.
- A separate encoder supply has to be provided with con-
sumers with high interference emission.
- Installation of the whole system has to be according
to EMC standards. Installation environment as well as
wiring have an impact on the encoder’s EMC. Encoder
and supplying lines are to be in separated locations or
remote from lines with high interference emission (fre-
quency transformers, protections, etc.).
- Encoder case and supply cable have to be completely
screened.
- Ground (PE) encoder by using screened cables. The
braided shield has to be connected to cable gland or
plug. Grounding (PE) on both sides is recommended.
Ground the case by the mechanical assembly, if latter
is electrically isolated a second connection has to be
provided. Ground cable screen by the subsequently
connected devices.
- In case of ground loop problems at least grounding on
one side is imperative.
Any disregard may lead to malfunctions, material damage
and personal injury.
Electrical connection
The bus cover is to be stored and transported whilst in
the ESD bag only. The bus cover has to fit the case tightly
and has to be firmly secured by screws.
- Unscrew both fixing screws of the bus cover.
- Loosen both bus cover elements carefully and remove it in
axial direction.
- Adjust participant address at the two decimal rotary
switches. The participant’s address for example 23.
- For the last participant the terminators are to be swit-
ched “ON” by means of the 2-pin Dip switch (default
OFF).
Both ON = final user
Both OFF = user X
Connection – cable gland (bus cover)
- Unscrew cap nut of cable gland. Push cap nut and seal
insertion onto the cable coat.
- Strip isolation of cable coat and cores and cut shielding
foil, if any (picture).
- Bend the braided shield for about 90°.
- Push seal insertion to the braided shield. Insert seal
and cable flush into the cable gland. Secure by carefully
tightening the cap nut.
- Use cable gland no. 3 for supply only. Cable glands no.
1 and 2 are for optional use as bus lines. Consider the
permitted cable cross-section.
- Use the shortest way to insert the cores into the termi-
nals and mind the maximum core cross-section.
- Use isolated core tip sleeves.
- There must not be any crossing of data lines with lines
for power supply.
cable
cap nut
wire
screen film
seal
screen
Starting torque
Terminal block/screw terminal max. 0.4 Nm
(recommended starting torque 0.3 Nm)
Screwing - bus cover max. 1.9 Nm
Spring coupling mounting max. 1.2 Nm
Clamping ring mounting max. 1.2 Nm
Core cross-section
Single wire (rigid)
Max. 1.5 mm
2
Fine wire (flexible)
Max. 1.0 mm
2
Fine wire (flexible)
With isolated ferrule
max. 0.75 mm
2
Cable diameter
Cable gland 1, 2
8...10 mm (-40...+85 °C)
5...9 mm (-25...+85 °C)
Cable gland 3
4.5...6 mm
Terminal assignment cable gland / connector M12
Connector M12 (male), A-coded
Pin 1
UB
Voltage supply 10...30 VDC
Pin 3
GND
Ground connection to UB
Connector M12 (male/female), B-coded
Pin 2
A
Negative data line
Pin 4
B
Positive data line
Terminals of the same significance are internally con-
nected and identical in their functions. Max. load on the
internal terminal connections UB-UB and GND-GND is
1 A each.
- Plug the bus cover carefully onto the D-SUB plug of the
basic encoder, then push it over the rubber seal. Avoid
the case getting wedged. The bus cover has to fit tightly
the basic encoder.
- Tighten both fixing screws firmly and conformable.
- An optimized connection between encoder case and
the braiding shield of the supply cable is only achieved
by a complete and close fit of the bus cover onto the
basic encoder (interlock).
5
12
cable
wire
screen
33
5
12
cable
wire
screen
43
Bus cable
Supply voltage cable
Disposal
Encoder components are to be disposed of according to
the regulations prevailing in the respective country.
Transport and storing
- In original packing only.
- Do not drop or expose encoder to major shocks.
Assembly
- Open clamping ring completely before mounting the
encoder.
- Avoid punches or shocks on case and shaft.
- Avoid case distortion.
- Do not open or modify encoder in any mechanical way.
- The spring arm of the spring coupling has to be free
movable.
Hollow shaft, bearing, glass disc or electronic
components might be damaged and a secure
operation is no longer guaranteed.
Hollow shaft mounting
Mounting with clamping ring
Plug encoder completely onto drive shaft (ISO-fit f7) and
tighten clamping ring firmly. The drive shaft must pene-
trate the encoder’s hollow shaft to a depth of at least
35 mm.
Mechanical assembly
Slide encoder onto the drive shaft and insert torque pin
into the adjusting element provided by customer or
insert pin into the mounted adusting part (with rubber
spring element) provided by customer.
Spring coupling
Fasten spring coupling at the fixing holes provided on housing by means of screws.
Slide encoder onto the drive shaft and fasten spring coupling at the surface provided
with screws.
drive
shaft
clamping ring
¡IJ
torque pin
40.5
20.5
50 38
5
±0.5
1.25
torque pin
adjustment
piece
rubber spring
element
adjustment piece with
torque pin 9.5 mm
4
2.5
22
30°
67°
25°
R37.25
R43.5
7
0.3
6.6
30
40.
5
7.
5
53.
5
M3
(1.2 Nm)
35
30
10
15.1
19.1
49.
3
7.
6
7.6
M3 (1.2 Nm)
SW2.5
20
°
20
73
81
M3x6 (1.2 Nm)
12 ±0.5
M3 (1.2 Nm)
SW2.5
20
77
68
20
°
M3 (1.2 Nm)
SW2.5
12
M4x6 (1.9 Nm)
11
4.
5
10.
5
53.5
63.75
20.5
95.75
20.5
30
7
0.
3
133.5
21
1
2
3
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
Dimensions
Clamping ring on flange
Clamping ring on housing
A
B
UB
GND
A
B
UB
GND
4
3
5
1
2
1
3
4
5
2
1
3
4
2
¡
¡IJ
¡+ ¡+
0[ [
¡
IJ
¡+ ¡+
¡