Land FTI6, Руководство по установке

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Installation Guide
Part E
Page 8
Installation Guide
Part E
Page 8
E3.2 Communications
The
FTI 6
fixed system offers these modes of serial communication to the host
system. The mode used will depend on the number of imagers connected to
the host and the distance between them.
The following table shows the configurations in which the various modes can
be used:
RS 232C RS 422 RS 485
Single imager <15m from host
✓ ✓ ✓
Single imager <1200m from host x
✓ ✓
2 or more imagers <1200m from host x x
✓
RS 232C
This communications mode is used for a single imager connected over a distance
less than 15m, powering the remote control unit.
RS 422/485
This communication mode uses differential lines for both the transmit and receive
channels and can be used to drive a cable up to 1200m in length. It is strongly
recommended that a terminating resistor (Rtm) is connected between the RX
and /RX terminals at both ends of the cable. This should have a value of about
100 ohms.
NOTE
When using the RS422/485 communications mode, the remote
control unit must be powered by a seperate power supply.
E3.2 Communications
The
FTI 6
fixed system offers these modes of serial communication to the host
system. The mode used will depend on the number of imagers connected to
the host and the distance between them.
The following table shows the configurations in which the various modes can
be used:
RS 232C RS 422 RS 485
Single imager <15m from host
✓ ✓ ✓
Single imager <1200m from host x
✓ ✓
2 or more imagers <1200m from host x x
✓
RS 232C
This communications mode is used for a single imager connected over a distance
less than 15m, powering the remote control unit.
RS 422/485
This communication mode uses differential lines for both the transmit and receive
channels and can be used to drive a cable up to 1200m in length. It is strongly
recommended that a terminating resistor (Rtm) is connected between the RX
and /RX terminals at both ends of the cable. This should have a value of about
100 ohms.
NOTE
When using the RS422/485 communications mode, the remote
control unit must be powered by a seperate power supply.