Emerson E2 Installation And Operation Manual page 76

13 14 15 16 17 18 19 20 21
1 2 4 5
637-4890 COM4 ON E2 PIB
RS-485 -2A
+
0V
637-4890 COM4 ON E2 PIB
RS-485 -2A
+
0V
TO DEVICE
•
6-16 E2 RX/BX/CX I&O Manual
XEV22D DRIVER TO E2
INSTALLATION GUIDE
XEV22D
HOT KEY
6 7 8 11
RS-485
+
0V
RS-485
+
0V
RESISTOR
100 OHM
½ WATT
EARTH GROUND
CONNECTION
FROM E2 PIB BOARD OR
OTHER RS-485 MODBUS
DEVICE
1. Connect the MODBUS Network to the RS-485 Connector
on the E2 PIB board (Belden 8641 recommended).
2. Note to wire the RS-485 +/- polarity at the E2 in the
reverse of the XEV22D device.
3. Position the three termination jumpers to the UP
(terminated) position to provide RS-485 termination at the E2.
4. 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.
5. At the XEV22 device, wire the MODBUS cable to the RS-485 +/-
terminals and connect the MODBUS shield to the pin 16
terminal.
12
6. Terminate the end of the MODBUS network at the last device
on the daisy chain with the MODBUS termination block
(P/N 535-2711), or by connecting a 150 ohm resistor between
the MODBUS +/- terminals.
For more information, please refer to the XVE22D user manual
P/N 026-1206 .
MODBUS SHIELD TO
TERMINAL OF DEVICE
13 14 15 16 17
XEV22D
4
1 2 5
_
+
WIRE BLACK TO +
_
WIRE WHITE TO
REVERSE POLARITY OF
+/- ON RS-485 CABLE
FROM E2 TO DEVICE
PIN 16
13 14 15
16 17
LAST XEV22D
DEVICE
1 2 4
_
+
WIRE BLACK TO +
WIRE WHITE TO
MODBUS TERMINATION
BLOCK (P/N 535-2711) 150 OHM
TERMINATE LAST DEVICE ONLY
026-1610 Rev 12 25-APR-2011
5