Rs-485 Adapter; Configuration Options; Factory Default; Switch Sw1/Sw2 Configuration - GE Multilin D400 Instruction Manual

RS-485 adapter

Configuration options

Factory default

Switch SW1/SW2 configuration

40
The RS-485 Adapter (GE Item No. 520-0208LF) plugs into any serial communication slot
(slots 1 through 8) on the D400. It contains two independently isolated RS-485 channels on
a single terminal block TB1: Channel 1 on terminals TB1-1 through TB1-5 and Channel 2 on
terminals TB1-6 through TB1-10. TB1 is a 10 position pluggable 5.08 mm pitch connector,
Molex P/N 39530-0010 (GE Item No. 640-0955).
See "RS-485 connections" on page 58 for typical cable connections.
The RS-485 card supports two configuration options on each channel:
• 2-wire
• 4-wire
Pull-up/pull-down and line termination selection is available for RS-422 signals.
The signal mode for each channel is selectable via two sets of switches on the RS-485 card:
• Channel 1 (TB1-1 to TB1-5) is configured by switches SW2 (top side) and SW4 (bottom
side).
• Channel 2 (TB1-6 to TB1-10) is configured by switches SW1 (top side) and SW3 (bottom
side).
Follow instructions for setting the switches to select the appropriate functions for each
channel.
The factory default setting is 2-wire on each channel and without RS-422 pull-up/pull-
down or line termination resistors selected.
Switches SW1 (for Channel 2 on TB1-6 through TB1-10) and SW2 (for Channel 1 on TB1-1
through TB1-5) control the signal mode for each channel. Each switch contains two switch
positions that can each be set to ON or OFF to select the appropriate channel option.
Table 9: RS-485 Card Switch SW1/SW2 Settings
Channel Option
2-Wire (default)
4-Wire
GE INFORMATION
CHAPTER 3: SETTING UP COMMUNICATION CARDS
SW1/SW2 Switch Positions
1
ON
OFF
D400 SUBSTATION GATEWAY INSTRUCTION MANUAL
2
OFF
ON