User`s manual

Physical Interface AW00049313000
62 Basler runner
Using the Outputs with RS-644 LVDS
You cannot directly use the RS-422 signal from a camera output line as an input to an RS-644 low
voltage differential signal (LVDS) receiver. However, if a resistor network is placed on the camera’s
output as shown in Figure 25, you can use the signal from the camera’s output line as an input to
an RS-644 device.
For the camera’s I/O circuitry to operate properly, you must supply a ground as shown in Figure 25.
Fig. 25: RS-422 Output Signal Modified for Use with an RS-644 Input
Note
Although the RS-644 standard allows several devices to be connected
together in a "multidrop" configuration, we strongly recommend that you do
not include any camera output in an RS-644 multidrop. Instead, we strongly
recommend that you use a direct, point-to-point connection between the
camera and your RS-644 LVDS receiver as shown Figure 25.
Camera
12-pin
Receptacle
I/O Out 1 -
I/O Out 1 +
3.3 V
120

To
FPGA
(control)
Gnd
Your
Gnd
To Your
RS-644
Input
RS-422
Transceiver
47
22
47
RS-422 Transceiver =
Linear Technology LTC 2855
or the equivalent
Receiver
Driver
Gnd