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40i - Installation/Operation - DRO installation - (25/40)
4.5
Connections
4.5.1
Connection of the feedback systems
The feedback systems (linear or rotary encoders) are connected via SUB-D HD type 15-pin female
connectors: X1 through X3.
Characteristics of feedback inputs: X1, X2 and X3:
-Maximum feedback consumption: 250 mA at the +5V input.
-Admits square-wave signal (TTL).
-It admits voltage modulated 1 Vpp sinusoidal signal
.
-
It admits SSI communication
for absolute encoders.
-Maximum frequency: 250 KHz, minimum gap between flanks: 950 nsec.
-Phase shift: 90º ±20º, hysteresis: 0.25 V, Vmax: 7V,
maximum input current: 3mA
- High threshold (logic state 1): 2.4 V < VIH< 5 V
- Low threshold (logic state 0): 0.0 V < VIL< 0.55 V
Feedback connection. Connectors X1, X2 and X3
Pin
Signal
1Vpp/
TTL
Signal
SSI
Function
1
A
-
Input for feedback signals
2
/A
-
3
B
-
4
/B
-
5
I0
Data
6
/I0
/Data
7
Alarm
Clock
8
/Alarm*
/Clock
9
+5V
Power supply to feedback devices
10
Not connected
11
0V
Power supply to feedback devices
12, 13, 14
Not connected
15
Chassis
Shield
1