Watlow PPC-2000 Bedienungsanleitung Seite 108

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Seitenansicht 107
Chapter 2: Hardware Installation PPC-2000 User’s Guide
84 Watlow Anafaze Doc.# 30002-00 Rev 2.3
Figure 2.72 Two Wire RS-485 Wiring
PPCs Mounted Close Together
In installations where two or more PPCs are close enough
together that using terminal strips or modular jack junction
boxes would result in greater lengths of flat cable than the
distance between the communications ports use modular jack
splitters and flat oval cables with RJ12 connectors on both
ends. See Figure 2.73.
Figure 2.73 Connecting Several PPCs with Short
Cable Runs
PPC 1
TXA/TDA/TX-
DC Common
Yellow (5)
Black (2)
Green (4)
Red (3)
White/Blue (1)
RA-
RB+
TA-
TB+
Signal
Common
Not Used
External
Termination
Resistor
RA-
RB+
TA-
TB+
Signal
Common
Not Used
TXB/TDB/TX+
RXA/RDA/RX-
RXB/RDB/RX+
Color (RJ Pin)Converter or Host
Yellow (5)
Black (2)
Green (4)
Red (3)
White/Blue (1)
Color (RJ Pin)
PPC N
optically
isolating
232 to 485
converter
PPC 1 PPC 2 PPC N
serial port
6-wire RJ12 splitter
232 Communications
485 Communications
shielded twisted pair cable
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