8
Eaton PDI WaveStar Infinity 2 Monitoring System Setup and Operation Manual P-164001106—Rev 01
33..22..55
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Upstream management system traffic for multiple units can be consolidated onto a single uplink by daisy-
chaining Monitors using the paralleled Modbus RTU connectors (RS1 and RS2) on the Monitor PCB (see
44--w
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4-wire Modbus RTU is the default Modbus RTU configuration. For 4-wire Modbus:
•
Jumpers must be removed from Pins 1 and 2 and Pins 5 and 6 on every Monitor PCB in the chain (
). Having Pins 1 and 2 and Pins 5 and 6 jumpered on any backpanel PCB in the daisy chain will
force 2-wire Modbus RTU for all units in the chain.
•
Infinity 2 Monitors are all Modbus RTU servers.
–
RX+ on the upstream Modbus client device (usually the Building Management System or DCIM
system) wires to TX+ on the next Monitor PCB (see
).
–
TX- from the Modbus client device wires to RX- on the next Monitor PCB (see
).
–
A second pair of wires connects the other pair of customer client TX+ to chain RX+ and customer
client TX- to chain RX-.
–
The TX+ & TX- going to the RX+ & RX- should be in the same shield. Do not run the +'s in one shield
and the -'s in another.
•
Run a dedicated ground wire with the signal wires and ground the shield at one end only.
Figure 3. Daisy-chained Infinity 2 Monitors with 4-wire Modbus RTU
Modbus
Client
Device
In�inity
Monitor 2
In�inity
Monitor 3
In�inity
Monitor 1
RX+
TX+
TX+
TX+
RX-
TX-
TX-
TX-
TX+
RX+
RX+
RX+
TX-
RX-
RX-
RX-
Both wires should be in
the same shield.
Both wires should be in
the same shield.
For 2-wire configuration (see
):
•
At least one Monitor in a device chain must have both jumpers jumped on its Modbus connection. If any
device in the chain has jumpers installed for 2-wire, all the device chain is 2-wire. To avoid confusion when
troubleshooting, all the devices in the chain should be jumped in the same way.
•
TX+ or RX+ on the Monitor (either one, because the on-board 2-wire jumpers short them together) wires
to TX+ or RX+ on downstream devices.
•
TX- or RX- on the Monitor wires to TX- or RX- on downstream devices.
Summary of Contents for PDI WaveStar Infinity 2
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