Xtium-CL PX4 User's Manual
Technical Specifications
•
75
Note 3.1: Interfacing to an RS-422 Driver Output
J1: External Signals Connector
(DH60-27P)
Reserved
Reserved
External Signals
Xtium-CL PX4
26
27
:
:
2
V (+)
RS-422
Compatible
Driver
1
V (+)
RS-422
Compatible
Driver
User Signal Ground
Reserved
25 :
Reserved
24 :
Reserved
23 :
General Output 4
22 :
General Output 3
21 :
Reserved
Reserved
19
20
:
:
Reserved
18 :
Reserved
17 :
General Input 4
16 :
General Input 3
15 :
Power (12 Volts)
14 :
Ground
13 :
General Output 2
12 :
General Output 1 / Strobe
11 :
Ground
10 :
General Input 2 / Trigger 2
9
:
General Input 1 / Trigger 1
8
:
Input Common Ground
7
:
Shaft Encoder B (+)
6
:
Shaft Encoder B (-)
5
:
Ground
4
:
Shaft Encoder A (+)
3
:
Shaft Encoder A (-)
2
:
Ground
1
:
Figure 28:External RS-422 Signals Connection Diagram
Note 3.2: Interfacing to a TTL (also called Push-Pull) Output
RS-422 (+) input
RS-422 (-) input
FG/system GND
DC
Bias Voltage
+2V
GND
Frame Grabber System
Interfacing TTL Output to RS-422 Inputs
via a Line Buffer/Driver
TTL signal source & Buffer Driver
(example: 74ACT244)
100 ohm
Figure 29: Interfacing TTL to RS-422 Shaft Encoder Inputs
•
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.
