Emerson XEV22D Especificaciones Pagina 24

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18 • XEV22D I&O Manual 026-1206 Rev 0 09-FEB-2011
16 E2 MODBUS Network Wiring
Connect MODBUS Network to the RS485 Connector on the E2 PIB board (Belden 8641 recommended).
Note to wire the RS485 +/- polarity at the E2 in the reverse
of the XEV22D devices.
Position the three termination jumpers to the UP (terminated) position to provide RS485 termination at the E2.
Do not connect the shield of the MODBUS network to the E2 PIB center terminal. Instead, use a 100 ohm 1/2 watt
resistor to connect the MODBUS cable shield to earth ground.
At each XEV22D device, wire the MODBUS cable to the RS485 +/- terminals and connect the MODBUS shield to
the pin 16 terminal.
Terminate the end of the MODBUS network at the last XEV22D device on the daisy chain with the MODBUS ter-
mination block (P/N 535-2711), or by connecting a 150 ohm resistor between the MODBUS +/- terminals.
Figure 16-1 - XEV22D to E2 Wiring Diagram
earth ground connection
BELDEN 8641
(TYPICAL)
Keyboard
RS485-1B
+ 0v -
RS-232
E2 Power Interface Board (PIB)
237-4810, Version 1.0 0
E2 Power InterfaceBoard (P.I.B.)
R
Position the three
jumpers to provide
RS485 termination
at the E2
TERMINATE NETWORK
+ 0v -
TX1 RX2RX1
JP4
JP5
JP6
JP1
JP2
JP3
637-4890
White +
Black -
RS485-2A
+ 0V -
EARTH GROUND
AC1
24VAC
AC2ON
OFF
Shield
LON
Echelon Terminate Up
RS485-2B
+ 0V -
9600 Baud Only
100 ohm
½ watt
4
2
1
19
7
8
18
5
6
17
15
1613
14
20
11
12
N
L
+
-
RS-485
Power In
21
42
1
19
78
18
56
hot key
1715
16
13 14
20
11
12
N
L
+
-
RS- 485
Power In
8(3)A
21
4
1
5
2
3
Second Level
XEV22D-1N0F0 24Vac/dc
B
l
a
c
k
W
h
i
t
e
MODBUS TERMINATION
BLOCK 535-2711 150 ohm
Terminate last device only
B
l
a
c
k
W
h
i
t
e
Black
White
BELDEN 8641
COM 4
8(3)A
XEV22D-1N0F0 24Vac/dc
hot key
4
1
5
2
3
Second Level
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