16 Eaton PDI WaveStar BCMS Hub Installation and Operation Manual P-164001108—Rev 01
16 RX+
GREEN
17
RX-
BLACK
18
SHIELD
WHITE DOWNSTREAM, Modbus RTU, Display 2
19
TX+
YELLOW
20
TX-
RED
Upstream and downstream are independent: one can be 2-wire and the other 4-wire. By default, Modbus RTU
is 4-wire. For 2-wire Modbus RTU, install jumpers at the Modbus upstream and/or downstream connections on
the display’s backpanel as shown in Figure 7.
Customer Ethernet connection for an upstream TCP/IP link is made to the display’s backpanel (Figure 7).
33..44 CCuussttoommeerr CCoonnnneeccttiioonnss ffoorr MMoonniittoorreedd EEqquuiippmmeenntt
The BCMS Hub has a single Modbus RTU downstream link to its monitored devices, and Modbus allows (32)
downstream electrical loads or drops on this bus. These drops or connection points are where RPPs,
JCOMMs, and PowerWave, PowerWave 2, or PowerWave Silver Bus Systems are connected. How these
connections are made vary by the type of equipment that is monitored and whether it has its own Monitor.
Modbus wiring at each connection can also vary. For example, most units have Modbus Shield or Common in
position 3 on the plug, but JCOMM has Modbus Shield or Common in position 1.
33..44..11 RReemmoottee PPoowweerr PPaanneell ((RRPPPP)) MMooddbbuuss RRTTUU CCoonnnneeccttiioonnss
If an RPP has a WaveStar Color Monitor or a WaveStar Monitor (monochrome), the Monitor’s downstream link
connects to (1) or (2) BCMS Boards, which can monitor up to (4) panelboards.
An RPP typically has a terminal block (TB) with (4) connections that allow the RPP to be conveniently wired into
the BCMS Hub Modbus device chain (Figure 9):
1. Monitor or BCMS board connection to TB
2. TB connection towards BCMS Hub
3. TB connection towards additional electrical loads or Modbus drops
4. Unused connection
Installation
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