Johnson Controls SABROE UniSAB III - Page 287

Engineering manual - UniSAB III 1.10.8
001930 en 2021.06
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UniSAB III (boot) and communication set-up
Fig. 45: RS485/Danbuss connection
UniSAB III uses Danbuss for Multisab sequencing between UniSAB III or Unisab II (up to 14 units). This
means that you can connect a UniSAB III unit into an existing UniSAB II Danbuss network and make the
UniSAB III run with the previously installed Unisab II, see Fig. 46.
Fig. 46: Danbuss set-up
From a UniSAB II unit it is also possible to read SCADA data (i.e. compressor running information, con-
figuration, set point, limits, timers etc) from a UniSAB III through Danbuss and an RS2LAN gateway, see
Fig. 46.
U n isa b III/ U n i sa b I I
In case of communication connections between Unisab III units
and/or Unisab II units, end termination must be used.
In Unisab III: set termination switch S1=ON.
In Unisab II: connect end termination block.
9111312 1014
- - T x D 1
- - R x D 1
X11
9111312 1014
- - T x D 1
- - R x D 1
X11
63646566
- - T x DL 12
- - R x DL 13
63646566
- - T x DL 12
- - R x DL 13
9107
- - T x D 1
- - R x D 1
X11
9107
- - T x D 1
- - R x D 1
X11
S1=on
S1=off
S1=off
S1=on
termination block
termination block
U n i s a b IIIU n i s a b III
U n i s a b III
U n i s a b III
U n i s a b II
U n i s a b II
LED colours
Tx D1 = red
Rx D1 = green
Unisab III controller module rev. E +
Unisab III controller module rev. D
LED colours
Tx DL 12 = red
Rx DL 13 = green
Unisab III/Unisab II
SCADA data
Ethernet
RS2LAN
Gateway
Unisab II no. 1 Unisab II no. 2 Unisab II no. 3
Unisab III no. 4 Unisab III no. 5
RS485/Danbuss
Sequence link