RCX C-Link Series
Power Supply
EDT, Inc.
2011 June 29
18
Cable assembly – Lemo resync
The resync cable, for medium or full mode, sends a common clock signal from an oscillator inside the DB9
shell to each of the two extenders at the framegrabber end. This cable also allows the X channel extender
to signal the YZ channel extender when to start each raster.
The two Lemo connectors on the resync cable are interchangeable.
The resync cable must have an oscillator frequency greater than or equal to the camera pixel clock rate.
The pixel clock re-created for the framegrabber is asynchronous to that generated by the camera; thus, the
amount of time spent in horizontal blanking varies from one raster line to the next. If the camera's clock rate
is slower than that of the resync cable, a greater percentage of time will be spent in horizontal blanking at
the framegrabber. Resync cables for 40, 60, and 80 MHz are available (see
Related Resources on page 2
).
From the tables under
Configuration and LED Configuration Codes on page 7
, select a configuration code
with a frequency range that is included in the frequency generated by the cable assembly.
Table 10
shows the pinout for this cable with a male DB9 connector.
If you use the resync cable, you will need a power source as well (see
Power Supply,
below).
Power Supply
Each extender has an internal switching regulator that supports voltages of 4.75 to 18 volts DC. For pin
information and polarity on the standard Switchcraft and the optional Lemo connector, see
Power on
page 16
.
CAUTION
To avoid damage to the extender, EDT recommends that you protect it from power spikes over 18 V,
use voltages at the lower end of the range, and never reverse the polarity of the power connector.
Table 10. Pinout – Resync Cable with Male DB9
Lemo
Pin
Lemo Signal
DB9 Signal
DB9
Pin
1
START, LVDS signal from X to YZ extender
[unconnected]
—
2
power
power
9
3
CLOCK+, LVDS pixel clock into X and YZ extenders
[unconnected]
—
4
CLOCK-, LVDS pixel clock into X and YZ extenders
[unconnected]
—
5
reserved
[unconnected] —
6
START_RASTER-, LVDS signal from X to YZ extender
[unconnected]
—
7
ground
ground
5
