Johnson Controls SABROE UniSAB III Engineering Manual page 287

UniSAB III (boot) and communication set-up
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.
Unisab III controller module rev. D
U n i s a b III
S1=on S1=off
T x D 1 X11
- -
R x D 1
- -
9 10 7
Unisab III controller module rev. E +
U n i s a b III
S1=off
S1=on
T x D 1 X11
- -
R x D 1
- -
9 11 13 10 12 14
LED colours
Tx D1 = red
Rx D1 = green
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.
Unisab II no. 1 Unisab II no. 2
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.
Engineering manual - UniSAB III 1.10.8
001930 en 2021.06
U n i s a b III U n i s a b II
T x D 1 X11 T x DL 12
- - - -
R x D 1 R x DL 13
- - - -
9 10 7 63 64 65
U n i s a b III
U n i s a b II
T x D 1 X11 T x DL 12
- - - -
R x D 1 R x DL 13
- - - -
9 11 13 10 12 14 63 64 65
LED colours
Tx DL 12 = red
Rx DL 13 = green
Unisab III/Unisab II
SCADA data
Ethernet
Unisab II no. 3
RS485/Danbuss
287/346
66
termination block
66
termination block
RS2LAN
Gateway
Unisab III no. 4 Unisab III no. 5
Sequence link