226
Connecting TTL Devices to Isolated Input Ports
Interfacing a device with a TTL or LVTTL output driver using an isolated input port
The isolated input ports of Coaxlink and Grablink 3G products are, by design, compatible with
TTL and LVTTL levels. No additional adapter is required to interconnect a (LV)TTL driver and an
isolated input. The following section describes in detail how to connect them, what are the static
voltage margins and what are the dynamic limitations.
Wiring diagram
Connecting an (LV)TTL driver to an isolated input
See also:
in the hardware manual for pin assignments.
1.
Connect TTL Signal to IN+
2.
Connect TTL Circuit Ground (Digital GND) to IN-
TIP
As good practice, it is recommended to shield the whole set of wires, using a
shielded cable.Shielding improve EMI protection against external
interferences (immunity) and avoid unwanted EM emissions. The shield
should be connected to the devices (PC, cameras, and systems components)
chassis and should be separated from the digital GND line.
Coaxlink
Hardware Manual
