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Figure 1. Using a Trunk/RS-422 Interface to Connect the Driver to the Vendor's Modbus Master or Modbus Slave
Siemens Building Technologies, Inc.
S
-
FLN
+
RS-485 TRUNK CABLE
(MAX 4000' / 1219.2 m;
STANDARD 24 AWG LOW CAPACITANCE)
POWER
S
-
PMD
+
SHIELD
TX-
TX+
TERMINAL
RX-
BLOCK
RX+
ONE TWISTED PAIR
(STANDARD 24 AWG LOW CAPACITANCE)
MAX LENGTH 4000'
RX-
RX+
TERMINAL
TX-
BLOCK
TX+
TO ADDITIONAL MODBUS DEVICES
DRIVER
GROUND WIRE TO EARTH
(P/N 538-583)
POWER PACK
TRUNK / RS-422
INTERFACE
MODBUS
DEVICE(S)
Device.
Document No. 565-887
Installation Instructions
October 27, 2006
Page 3 of 6
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