Johnson Controls SABROE Unisab III Control Engineering Manual page 267

Unisab III (boot) and communication set-up
Unisab III/Unisa b II
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 print cassette rev. D
Unisab III
S1=on
S1=off
Tx D1 X11
- -
Rx D1
- -
9 10 7
Unisab III print cassette rev. E +
Unisab III
S1=off
S1=on
Tx D1 X11
- -
Rx D1
- -
9 11 13 10 12 14
LED colours
Tx D1 = red
Rx D1 = green
Fig. 40: 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. 41.
Unisab II no. 1 Unisab II no. 2
Fig. 41: Danbuss set-up
From a Unisab II unit it is also possible to read SCADA data (i.e. compressor running informa-
tion, configuration, set point, limits, timers etc) from a Unisab III through Danbuss and an
RS2LAN gateway, see Fig. 41.
Engineering manual - Unisab III 1.10
001930 en 2014.09
Unisab III Unisab II
Tx D1 X11 Tx DL 12
- - - -
Rx D1 Rx DL 13
- - - -
9 10 7 63 64
Unisab III
Unisab II
Tx D1 X11 Tx DL 12
- - - -
Rx D1 Rx DL 13
- - - -
9 11 13 10 12 14 63 64
LED colours
Tx DL 12 = red
Rx DL 13 = green
Unisab III/Unisab II
SCADA data
Ethernet
Unisab II no. 3
RS485/Danbuss
265/319
65 66
termination block
65 66
termination block
RS2LAN
Gateway
Unisab III no. 4 Unisab III no. 5
Sequence link