Emerson operation manual E2 Installation Guide

E2 INSTALLATION GUIDE

1.Connect the I/O or MODBUS Network to one or all of the E2 RS485 I/O

or MODBUS Network ports. (A maximum of 31 devices can be wired to each I/O or MODBUS Network port.)

2. If the E2 is the beginning of all RS-485 I/O
or MODBUS Networks, set all three jumpers						5
to the UP position. For MODBUS, set the					3		4
jumpers in the top-most position (MOD). For
I/O Net, set the jumpers in the middle position
(I/O). For no termination, set the jumpers to
the DOWN position (NO).
3. Connect earth ground to one of the two
ground terminals provided. Use 12 AWG
(preferred) or 14 AWG wire and keep as
short as possible (less than 12 inches
preferred).			RS485 I/O or MODBUS Net
4. Connect 24VAC to the power terminals.
5. Flip the power switch to the ON position.
When 24VAC has been applied to the board,			MOD [	MOD[	MOD[
the green LED will illuminate.
			I/O [	I/O [	I/O [
			NO [	NO [	NO [
			NOT TERMINATED	TERMINATED	TERMINATED
I/O or MODBUS Network				FOR I/O NET	FOR MODBUS NET
+	0V	_	Can be any COM port on the board

WHITE SHIELD BLACK

	Earth
	Ground
TO OTHER	Connector
RS485
DEVICES

12 or 14 AWG

OBSERVE WIRE

COLOR POLARITY

AC1

24VAC

AC1

24VAC

AC2 AC2

4-4 • E2 RX/BX/CX I&O Manual 026-1614 Rev 4 5-JAN-2013