Eaton CEAG DualGuard-S Mounting And Operating Instructions page 74

35 3-PM-IO-INV Module
L1
L2
Bus connection 3-PM-IO, 3-PM-IO-INV and
L3
N
PE
TLS module
An RS485 bus is wired for data communication with exter-
nal bus modules.
The wires of the RS 485 bus line must be connected to
the ACU DG terminal strip at the terminal points RS485 A,
RS485 B, +24V OUT and -24V OUT.
3-PM-IO
A parallel connection of data lines is not permitted and
does not extend the permissible line length.
Wires within a shield can be connected in parallel to supply
voltage to the modules.
ATTENTION!
ACU
Bus topology: linear, double terminated (no stub lines per-
mitted). Cable type (minimum requirement): IY(ST)Y 4 x 2
x 0.8 mm (twisted pair, shielded) - the cable shield must
be connected to the SE terminals of each module and
must only be earthed in the DualGuard-S control cabinet.
The cable cross-section required for the 24 V bus voltage
depends on the cable length and the number of bus modu-
les (Umin = 19 V DC). Only one pair of wires may be used
as data cable within the shield - it is not permitted to bundle
several data cables within one shielded cable! The 120
Ohm terminating resistor is integrated in the modules and
can be activated by a bridge at terminals B1/B2.
74
Mounting- and Operating Instruction CEAG DualGuard-S 40071860347 January 2020 www.ceag.de
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