Customer Network Connections
Cntl Nr: PM375107-002
11
Attach Modbus RTU Cable to the Accumulator PCB in the Comm Box
4.
Connect your Modbus RTU cable
to the Accumulator PCB at
J5
.
Accumulators can be daisy-
chained using
J5-J6
connections.
(See Section
2.3.1, Daisy-
chaining Power Feeds using
Modbus RTU
.)
5.
Set 4-wire or 2-wire Modbus
RTU.
4-wire Modbus RTU is the
default configuration.
For 2-wire Modbus RTU install
jumpers on
J1
and
J2
.
If Accumulator PCBs are daisy-
chained together, Modbus RTU
will be 2-wire if jumpers are
installed on
J1-J2
on
any
Accumulator PCB in the chain.
2.3
Daisy-chaining Power Feeds
It is often desirable to daisy-chain a cluster of nearby power feeds to consolidate data presentation onto a
single uplink. Power feeds can be daisy-chained using Modbus RTU or Modbus TCP/IP. All power feeds
must use the same upstream protocol. Power feeds cannot be daisy-chained using SNMP.
2.3.1
Daisy-chaining Power Feeds using Modbus RTU
When your upstream network link is Modbus RTU, power feeds are daisy-chained together by daisy-
chaining their Accumulator PCBs. Up to (32) Accumulator PCBs (or power feeds) can be daisy-chained
Accumulator PCB is shown here
rotated 180° from its orientation
in the Comm Box.
J6
: G RX
-
RX
+
TX
-
TX
+
J5
: G RX
-
RX
+
TX
-
TX
+
J6
is input from
another daisy-chained
Accumulator PCB.
J5
is output to a Modbus
master device, such as a
BMS or DCIM system or a 7"
Local Display, or to another
Accumulator PCB.
