Filter
Top Products
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
to the UP position. For MODBUS, set the
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).
4. Connect 24VAC to the power terminals.
5. Flip the power switch to the ON position.
When 24VAC has been applied to the board,
the green LED will illuminate.
E2 INSTALLATION GUIDE
4
3
5
BLACK
SHIELD
WHITE
TO OTHER
RS485
DEVICES
_
0V
+
I/O or MODBUS Network
OBSERVE WIRE
COLOR POLARITY
NOT TERMINATED TERMINATED
FOR I/O NET
RS485 I/O or MODBUS Net
Earth
Ground
Connector
12 or 14 AWG
AC1
AC2
AC1
AC2
24VAC
24VAC
MOD
I/O
NO
MOD
I/O
NO
Can be any COM port on the board
TERMINATED
FOR MODBUS NET
MOD
I/O
NO
[
[
[
[
[
[
[
[
[
4-4 • E2 RX/BX/CX I&O Manual 026-1614 Rev 4 5-JAN-2013