Simplex NEPTUNE - MODBUS Installation; Modbus Serial Converter

20 — Installaon
e Neptune load bank
supports the Modbus pro-
tocol, implemented either as
RS485 or TCP/IP (which is
an optional upgrade).
To implement Modbus
control and monitoring,
connect the load bank to
your facility’s systems as fol-
lows:
For RS485:
1. Connect the RS485+ line
to TB-COM 1
2. Connect the RS485- line
to TB-COM 2
3. Connect the wire shield-
ing to TB-COM Terminal
3
For Optional Modbus
TCP/IP
1. Plug a CAT5e cable into
the ethernet jack on the
MODBUS Serial Con-
verter (see Figure 16
Modbus Serial Converter.)
e Neptune Modbus control set is implemented as detailed
in “Appendix B — Modbus controls” on page 49
modbuS
inStallation
Figure 15 TB-COM
Figure 16 Modbus Serial
Converter