Document No. 565-887
Installation Instructions
October 27, 2006
FLN
DRIVER
TX-
TX+
RX-
RX+
RX-
RX+
TX-
TX+
S
-
+
RS-485 TRUNK CABLE
(MAX 4000’ / 1219.2 m;
STANDARD 24 AWG LOW CAPACITANCE)
GROUND WIRE TO EARTH
(P/N 538-583)
POWER PACK
TRUNK / RS-422
INTERFACE
MODBUS
DEVICE(S)
GW0277R3
TAPE BACK
SHIELD
ONE TWISTED PAIR
(STANDARD 24 AWG LOW CAPACITANCE)
MAX LENGTH 4000’
TO ADDITIONAL MODBUS DEVICES
POWER
TERMINAL
BLOCK
TERMINAL
BLOCK
PMD
S
-
+
Figure 1.
Using a Trunk/RS-422 Interface to Connect the Driver to the Vendor’s Modbus Master or Modbus Slave
Device.
Siemens Building Technologies, Inc.
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