
28
ENG
Installation notes
g0300122EN rel. 1.0 - 01.12.2021
6.5 Unit hardware backup
For applications that require continuous humidity control, a second backup unit may be required, which is automatically activat-
ed in the event of a malfunction on the fi rst. The gaSteam controller features a dedicated digital input and output for the backup
connection, so as to guarantee, via the normally-open contact, activation of the second unit.
300090
_
044
_
R02
unit
ba
ck
up
ba
ck
up
I
N
/
OUT
Hard
w
are
ba
ck
up
Fig. 6.i
Connection between two units for the hardware back-
up function:
Terminal
Function
9U
Backup and rotation contact common
10U
Backup and rotation contact (NO)
2U
GND
4U
Digital input for backup/rotation function
Tab. 6.d
U
nit 1
U
nit 2
M2
M9
M8
1
1
2
3
4
5
6
7
8
2
1
2
M2
M9
M8
1
1
2
3
4
5
6
7
8
2
1
2
1U
2U
3U
4U
5U 6U 7U 8U
9U 10U
11U 12U 13U 14U
U
1U
2U
3U
4U
5U 6U 7U 8U
9U 10U
11U 12U 13U 14U
U
Fig. 6.j
The hardware backup function must be activated on the menu in screen Ee01. Screen Ee02 is used to set the unit with higher
priority in the event of simultaneous activation. To ensure service continuity, the external signal or probes must be connected
to both units; in this way, both the main unit and the backup unit will be completely independent. If using autonomous control
with probes, it is recommended to use dedicated probes for each unit (main probe and limit probe), in other words, do not share
the probes between the units. This will guarantee service even in the event of probe malfunctions.
6.6
S
upervisor protocols and confi guration
The humidifi er can be connected to a supervisor via serial (BMS) or Ethernet network. The Carel, ModBus and BACnet protocols
are supported as standard by the units.
M2
M9
M8
M1
M5
M6
1
1
2
3
4
5
6
7
8
2
1
M12
1
3 2
3
1
2
2
1
2
1
2
Ethernet
M2
M9
M8
1
1
2
3
4
5
6
7
8
2
1
2
M1
M5
M6
3
1
2
1
2
1
2
2
1
Fig. 6.k
Key:
Port
Terminal on c.pHC controller Protocol
BMS (1)
M12.1, M12.2, M12.3
Carel, ModBus, BACnet
Ethernet (2)
ModBus, BACnet
Tab. 6.e
To confi gure supervision on the BMS port (1), go to “SETTINGS – SUPERVISION”, specifi cally screens Eh01, Eh02 and Eh03. If con-
necting the supervisor to the Ethernet port (2), set the network parameters (DHCP, IP address, subnet mask, gateway, DNS) on
screen Eh04. For other supervisor protocols, select Carel protocol and use the Carel external gateway (supernode for humidifi ca-
tion: SNU0000EM0), combined with the desired supervisor card (depending on the protocol).