nVent RAYCHEM RMM2-E Installationsanleitung Seite 7

The RMM2-E has two sets of terminals for connections to the
RS-485 bus. One terminal block allows the RMM2-E to connect
to the RS-485 bus, the second allows a continuation of the bus
to other RMM2-E units on the network. Observe polarity, which
is indicated on the RMM2-E. Connect the incoming RS-485 bus
to the set of terminals marked "IN", observing the polarity noted
on the cover of the RMM2-E; use the terminal marked "S" for the
shield of the RS-485 cable. Connect the continuation of the RS-
485 bus to the set of terminals marked "OUT" in the same manner
(not required for the last RMM2-E in the network).
Important: Do not connect the shield of the RS-485 cables to the
enclosure's grounding terminal. Connect the shield only to the
RMM2-E terminals provided. To avoid the potential for spurious
ground loops, the RS-485 cable shield should be connected to
ground only in the nVent RAYCHEM unit. For the last RMM2-E in
the network, terminate the RS-485 bus by removing the shorting
block on jumper location J17 from 2–3 and placing it across pins
1–2.
OR
NGC-30 via UIT2 NGC-40 via Bridge module
nVent.com/RAYCHEM
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