Emerson XM678D - Page 24

16 • XM678D I&O Manual 026-1219 Rev 3
Figure 8-1 - Wiring Guidelines for Sharing a Pressure Transducer Across Multiple Units on the Same Circuit
XM678D
Address01
LAN
RS485
Black
39
White
38
MultiFlex XXX+
Address01
RS485
BlackWhite
Ground
RS485
Black
White
Ground
Black
White
Black
37
White
36
XM678D
Address02
XM678D
Address08
Circuit 1
XM678D
Address09
XM678D
Address10
XM678D
Address16
Circuit 2
XM678D
Address17
XM678D
Address18
XM678D
Address24
Circuit 3
XM678D
AddressXX
XM678D
AddressXX
XM678D
AddressXX
Circuit X
MultiFlex XXX+
Address02
RS485
MultiFlex XXX+
Address03
RS485
MultiFlex XXX+
AddressXX
RS485
LAN
RS485
LAN
RS485
LAN
RS485
LAN
RS485
LAN
RS485
LAN
RS485
LAN
RS485
LAN
RS485
Black
39
White
38
Black
37
White
36
Black
39
White
38
Black
37
White
36
Black
39
White
38
Black
37
White
36
Black
39
White
38
Black
37
White
36
Black
39
White
38
Black
37
White
36
Black
39
White
38
Black
37
White
36
Black
39
White
38
Black
37
White
36
Black
39
White
38
Black
37
White
36
Black
39
White
38
Black
37
White
36
Black
39
White
38
Black
37
White
36
Black
39
White
38
Black
37
White
36
BlackWhite
Ground
Black
White
Ground
Black
White
Ground
Termination
I/O Board
+
+
Ground
Do not connect the shield of the MODBUS
network to the E2 PIB center terminal.
Instead, use a 100 ohm ½ watt resistor
to connect the MODBUS cable shield to
earth ground
100 ohm
1/2 watt
+
+
RS485
RS485
RS485
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
LAN
RS485
LAN
RS485
LAN
RS485
Shield
Shield
Shield
Shield
+
+
+
+
MODBUS
Network
Ter m
Set E2 to 9600
baud
Ter m
Termination Block
A maximum of 8 devices are allowed on LAN
COM4
COM2
Polarity is reversed
at the E2 for
XM devices