Example: Connecting To The Rs-422 Shaft Encoder Block Diagram; Note 3.2: Interfacing To A Ttl (Also Called Push-Pull) Output; Figure 29:External Rs-422 Signals Connection Diagram; Figure 30: Interfacing Ttl To Rs-422 Shaft Encoder Inputs - Dalsa Xtium2-CLHS PX8 User Manual

Example: Connecting to the RS-422 Shaft Encoder Block Diagram

V (+)
RS-422
Compatible 1
Driver
V (+)
RS-422
Compatible 2
Driver
User Shaft Encoder
Signal Ground

Note 3.2: Interfacing to a TTL (also called Push-Pull) Output

TTL signal source & Buffer Driver
(example: 74ACT244)
GND
The graphic shows a single-ended driver signal interfaced to the RS-422 input.
•
RS-422 (-) input is biased to a DC voltage of +2 volts.
•
This guarantees that the TTL signal connected to the RS-422 (+) input will be detected as a
•
logic high or low relative to the (-) input.
Xtium2-CLHS PX8 User's Manual
External Signals

Figure 29:External RS-422 Signals Connection Diagram

Interfacing TTL Output to RS-422 Inputs
via a Line Buffer/Driver
Bias Voltage
+2V
DC

Figure 30: Interfacing TTL to RS-422 Shaft Encoder Inputs

Xtium-CLHS PX8
1 : Ground
2 : Shaft Encoder A (-)
3 : Shaft Encoder A (+)
4 : Ground
5 : Shaft Encoder B (-)
6 : Shaft Encoder B (+)
7 : General Input 1 / Trigger 1 (-)
8 : General Input 1 / Trigger 1 (+)
9 : General Input 2 / Trigger 2 (+)
10 : Ground
11 : General Output 1 / Strobe
12 : General Output 2
13 : Ground
14 : Power Output (12 Volts)
15 : General Input 3 (+)
16 : General Input 4 (+)
17 : General Input 4 (-)
18 :
General Input 3 (-)
19 :
Power Output (5 Volts)
20 : General Input 2 / Trigger 2 (-)
21 : General Output 3
22 : General Output 4
23 :
General Output 5
24 :
General Output 6
25 : General Output 7
26 :
General Output 8
27 : Reserved
J1: External Signals Connector
(DH60-27P)
RS-422 (+) input
100 ohm
RS-422 (-) input
FG/system GND
Technical Specifications • 85
Frame Grabber System