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B
M
A
B
M
A
B
M
A
B
M
A
BUS OUT
BUS
IN
CONTROL/RFI
D
EN
ERGY ME
TE
R
CONTRO
L/RFI
D
EN
ERGY METE
R
B M A B M A
R
B M A B M A
L
CONTROL/RFID ENERGY METER
CONTROL/RFID ENERGY METER
BUS IN
BUS OUT
A M B A M B
A M B A M B
CONTROL
METER
CONTROL
METER
A M B A M B
A M B A M B
BUS OUT
BUS IN
CONNECTING THE WALLBOXES TO THE CLU
Connect a communication cable between the CLU and the wallboxes. Use a communication
cable with at least two twisted pairs of a single bus system, and four twisted pairs for a
double bus system. The figures below show where a CAT5/CAT6 cable with solid copper
core wires may be connected to the wallbox.
WIRING
The bus requires at least 3 conductors: 2 signal wires (A and B) and 1 signal ground
reference (M). If a twisted pair cable with multiple pairs is used, one pair must be used for
A and B and one pair for M.
GROUNDING AND SHIELDED CABLES
A ground wire is required so that all nodes on the bus share a common ground reference.
The ground wire could be a separate wire or a pair of the twisted pair cable. If a shielded
twisted pair cable is used, the shield must be connected to ground at one end only as
shown in the figure below.
CONTROL/RFID
B
M
A
B
M
A
B
M
A
B
M
A
B
M
A
CONT
RO
L/
RFI
D
ENERGY M
ET
ER
BUS
OU
T
BUS
IN
CONT
RO
L/
RFI
D
ENERGY MET
ER
B
M
A
B
M
A
B
M
A
B
M
A
B
M
A
CONT
RO
L/
RFI
D
ENERGY M
ET
ER
BUS
OU
T
BUS
IN
CONT
RO
L/
RFI
D
ENERGY MET
ER
B
M
A
B
M
A
B
M
A
B
M
A
B
M
A
CONT
RO
L/
RFI
D
ENERGY M
ET
ER
BUS
OU
T
BUS
IN
CONT
RO
L/
RFI
D
ENERGY MET
ER
Connect shield to ground
at only one point
The length of the
untwisted wires from
a twisted pair cable
must be kept as
short as possible
Keep shield
continued
Shield
eRange Duo with lid open
eRange Uno with lid open
Manufactured until June 2019
Manufactured from July 2019
