Connecting To A Vtr Rs-422 Port (Model 8010-Sie Only); Figure 2-2: Typical Gpio Circuitry - evertz 8010-SIE Instruction Manual

Model 8010-SIE Digital Source ID Encoder Manual
activated. Lowering the GPI input to a voltage below 0.8 volts will activate the input. The user can
activate GPIs simply by connecting the GPI input pins to Ground using a button, switch, relay or an
open collector transistor.
The outputs are internally pulled up to 5 volts. Care must be taken to limit the load to 0.5W so there is
no affect on the power supply source in the frame.
Each I/O pin is electrically wired so it can be used as either an input or output. When the pins are used
as inputs, the software turns off the output driver transistor. Figure 2-2 shows the circuitry for each of
the I/O pins.
+ 5 Volts
365 ohm
Typical
I/O Pin
22 ohm

Figure 2-2: Typical GPIO Circuitry.

2.7.

CONNECTING TO A VTR RS-422 PORT (MODEL 8010-SIE ONLY)

When the 8010-SIE is in the VTR mode, the serial remote control port is used to eavesdrop on the RS-
422 serial control between a VTR and its controller. The serial port is used to obtain timecode and
status information from the VTR. At this time the 8010-SIE is customized to eavesdrop on the
communications between a Lance HSE-100 Edit Controller and a Sony VTR. The use of other edit
controllers may not give expected results on the VTR status of the 8010-SIE (See chapter 4 for a
complete description of the serial port operation). The wiring diagram below can be used to make an
appropriate cable.
INSTALLATION Page 2-7
Revision 2.2