19
5.
RS485 Port Electrical Interfaces
In order to ensure appropriate network conditions (signal voltage levels, etc.)
when using the gateway’s RS485 port, some knowledge of the network
interface circuitry is required. Refer to Figure 6 for a simplified network
schematic of the RS485 interface circuitry. Note that the “Shield” terminal has
no internal connection: its purpose is simply to provide a cable shield chaining
location between devices. The shield is then typically connected to ground at
one location only.
Figure 6: RS485 Interface Circuitry Schematic
Figure 7 details the specific network connections to the RS485 terminal block.
A
B
Signal Ground
Shield
Figure 7: RS485 Terminal Block Connections
Содержание MBP-100
Страница 8: ...7 2 Mechanical Diagrams 2 1 Enclosure Figure 1 Enclosure Dimensions units are inches...
Страница 9: ...8 2 2 Mounting Clip Figure 2 Mounting Clip Dimensions units are inches...
Страница 11: ...10 ASD Link LEDs Data Write LEDs ASD 2 ASD 3 ASD 1 Figure 5 Top View...
Страница 32: ...31 Figure 10 HyperTerminal Properties Connect To Figure 11 HyperTerminal Properties Connect To Configure...
Страница 33: ...32 Figure 12 HyperTerminal Properties Settings...