MICRO-EPSILON confocal DT2471, Руководство по эксплуатации

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Page 23
Assembly
confocalDT 24x1
4.5.8 Encoder Inputs
Three encoders can be connected simultaneously
and powered with 5V using the 15-pin HD-sub con-
nector.
Each encoder provides A, B and N signals (zero pulse,
reference, index).
The maximum pulse frequency is 1 MHz.
Values for A, B, N: TTL level
2.4 V ≤ High ≤ 5 V
0 V ≤ Low ≤ 0.5 V
Reference value: GND
Encoder supply 5 V: 5 V each, max. 150 mA
Fig. 14 15-pin HD connector
Encoder Pin Signal Encoder Pin Signal Encoder Pin Signal
1
5 A1
2
4 A2
3
3 A3
15 B1 14 B2 13 B3
10 N1 9 N2 8 N3
1 GND1 6 GND2 11 GND3
2 5V-1 7 5V-2 12 5V-3
Cover Screen Cover Screen Cover Screen
Fig. 15 Encoder In pin configuration
Use a shielded cable of less than 3 m. Connect the cable shield to the cover.
Connection requirements
The signal refers to ground (GND). Tracks A and B of encoder n are connected to inputs
An and Bn, with common ground GNDn. The inputs are not electrically isolated from the
supply voltage.
4.5.9 Status Inputs for External Light Sources
The Lifetime and Overheat error details are transmitted through the status cable (in-
cluded in the delivery of the external light source IFX2471) from the external light source
IFX2471 to the controller IFC2471, see Chap. A 3.6 .
Use of the status cable is optional, as the status LEDs on the light sources will also indi-
cate the state.
The status signals are used internally to help the controller detect any external light
source errors automatically and to issue warnings.