SeaLevel PCIO 4035, Руководство пользователя

Страница: 9 / 24

Card Setup
Sealevel Systems PCIO Page 5
Headers E1
These jumper blocks make the connection between the UART pins and the
actual driver/receiver pair that are used. If you are using the RS-232
driver/receiver pair, all eight of these jumpers will be in the ‘A’ position.
If you are using the RS-422 driver/receiver pair all eight of these jumpers
will be in the ‘B’ position.
Headers E2
These jumper blocks allow you to customize your interface in the
following ways:
•
Select if Modem control signals are used or tied ‘True’.
•
Select the RS-485 enable options.
•
Select whether the Ground connection is a Direct Ground or a High
Impedance Ground through a 100 ohm resistor.
1
2
3
4
5
6
7
8
A | B
E2
"A" Selects RS-232 Receive Data; "B" Selects RS-422 Receive Data
"A" Enables CTS; Remove to set Active
"A" Enables DSR; "B" sets DSR Active
"A" Enables DCD; "B" sets DCD Active
"A" Enables RI; "B" Sets RI Active
"A" Also required to Enable CTS; "B" Sets CTS Active
"B" Selects Direct Ground; "A" Selects 100 ohm High Impedence Ground
"B" sets RS-485 Driver Enabled by RTS; "A" RS-485 Driver always Enabled
Figure 5 - Header E1 and E3, Interface Selection Options