SMC Networks ProtoCessor FPC-ED2, Руководство для стартапов

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Installing the Gateway
VorTek ProtoCessor Start-up Guide 10
3.2 Serial Network: Wiring Field Port to RS-485 Network
•
Connect the RS-485 network wires to the 3-pin RS-485 connector on the ProtoCessor as shown
below in
Figure 4 .
o
Use standard grounding principles for RS-485 GND
•
See Section 6.2 for information on connecting to an Ethernet network.
•
If the ProtoCessor is the last device on the trunk, then the end of line (EOL) termination switch
needs to be enabled.
See ( Figure 5 ) for the orientation of switch positions referenced below.
o
The default setting from the factory is OFF (switch position = right side)
o
To enable the EOL termination, turn the EOL switch ON (switch position = left side)
•
If more than one RS-485 device is connected to the network, then the field bias resistor switch
needs to be enabled to ensure proper communication.
See Figure 5 for the orientation of switch
positions referenced below.
o
The default factory setting is OFF (switch position = right side)
o
To enable biasing, turn the bias switch ON (switch position = left side)
NOTE: Biasing only needs to be enabled on one device. The ProtoCessor has 510 ohm resistors
that are used to set the biasing.
BMS
Wiring
ProtoCessor
Pin #
Pin
Assignment
RS-485 + Pin 1 RS-485 +
RS-485 - Pin 2 RS-485 -
- Pin 3 RS-485 GND
Bias Resistor Switch
End of Line Switch
Figure 5: RS-485 EOL & Bias Resistor Switches
Figure 4: Connection from ProtoCessor to RS-485 Field Network
G
-
+