Festo Контроллер двигателя CMMD-AS - Manual (Page 108)

6. Electrical installation
108 Festo P.BE-CMMD-AS-HW-EN 1002NH
6.4.2 Shaft encoder motor – EnDat 2.1 and 2.2 [X2.1/2]
Only encoders with digital EnDat 2.1 or 2.2 interface with a maximum power consumption
of 200 mA are supported.
Operating voltage for the encoder is taken from the internal +5 V logic supply. An
adjustment to maximum power of the voltage drops on the encoder connection cable is
not planned (and for EnDat 2.2/22 encoder also not necessary).
The tolerance of the encoder supply voltage is limited downward in order to operate older
Heidenhain encoders with EnDat 2.2/01 interface. But depending on power consumption
and cable length, it may be necessary to double the wiring of the supply lines.
Example:
Encoder wiring with the cross section of 0.5 mm²
Cable length of 25 m, (= 50 m line to and from)
Double wiring
Voltage drop with single wiring U
diff
0.18 V
Pin Designation Value Specification
1 MT+ +3.3 V / 3 mA Motor temperature sensor, NC, PTC, KTY...
Not occupied with NEBM lines
2 U_SENS- 5 V –0 % / +5 %
I
max
= 200 mA
Connected internally with pin 3
3 GND 0V Reference potential for encoder supply and motor
temperature sensor
4 n.c.
5 #DATA 5 V
ss
R
I
120
Bidirectional RS485 data cable (differential) Zero impulse
transmission with HYPERFACE
6 #SCLK 5 V
ss
R
I
120
Cycle output RS485 (differential) for data transfer
via the EnDat interface
7 n.c.
8 n.c.
9 U_SENS+ 5 V -0 % / +5 %
I
max
= 200 mA
Connected internally with pin 10
10 US 5 V -0 % / +5 %
I
max
= 200 mA
Operating voltage for EnDat encoder
11 n.c.
12 DATA 5 V
ss
R
I
120
Bidirectional RS485 data cable (differential) Zero impulse
transmission with HYPERFACE
13 SCLK 5V
ss
R
I
120
Cycle output RS485 (differential) for data transfer
via the EnDat interface
14 n.c.
15 n.c.
Table 6.6 Pin allocation of shaft encoder motor EnDat 2.1 and 2.2. [X2.1/2]