Eaton PDI WaveStar Infinity 2, Руководство по установке и эксплуатации

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8 Eaton PDI WaveStar Infinity 2 Monitoring System Setup and Operation Manual P-164001106—Rev 01
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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
Figure 2 ).
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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 (
Figure 2 ). 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
Figure 3 ).
– TX- from the Modbus client device wires to RX- on the next Monitor PCB (see Figure 3 ).
– 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 Figure 4 ):
• 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.
Customer Network Connections