Emerson Official Manual for E2 Controller: Install Guidance for XR75CX and XR35CX

XR35CX, XR75CX TO E2 INSTALLATION GUIDE

16 17 18 19 20 21 22 23 24

XR35CX / XR75CX

DEVICE

1 2 3 4 5 6 7 8

HOT KEY

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

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 each device, wire the MODBUS cable to the RS-485 +/- terminals

and connect the MODBUS shield to the pin 18termi nal.

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 XR35CX user manual - P/N 026-1203and the XR75CX user manual - P/N 026-1210.

RS-485 I/O or MODBUS Net

COM 4

NOT TERMINATED TERMINATED

637-4890 COM4 ON E2 PIB

RS-485 -2A RS-485

+ 0V + 0V

RESISTOR

	100 OHM
BELDEN 8641	½ WATT

TO DEVICE

EARTH GROUND CONNECTION

637-4890 COM4 ON E2 PIB

RS-485 -2A RS-485

	+ 0V			+	0V
			WIRE WHITE TO +
			WIRE BLACK TO_
SHIELDED TWISTED
PAIR BELDEN 8641
RECOMMENDED					100 OHM
		OBSERVE WIRE			½ WATT
		COLOR POLARITY

REVERSE POLARITY OF +/- ON RS-485 CABLE FROM E2 TO DEVICE

WIRE BLACK TO +

WIRE WHITE TO _

MODBUS TERMINATION BLOCK (P/N 535-2711)150 OHM TERMINATE LAST DEVICE ONLY

FROM OTHER RS-485

MODBUS DEVICE

MODBUS TERMINAL

BLOCK

XR35CX/XR75CX

TERMINAL XR35CX/XR75CX

ECT MODBUS The RS485 Network and Hardware Setup • 6-21