schwankgroup.com/schwankair
Connecting external control - including BMS functions
78 9 10 1112
15161718
19 20
COM 1
COM 2
BUS
ROOM
Controller
External Board
12 3
D0 D1
Gnd
4 5 6
1314
21 22
+- +-
Terminal
Functions
COM1
RJ12 [6/6] Controller internal communication
COM2
RJ12 [6/6] Controller internal communication
D0
D1
Gnd
BUS
Modbus/RTU via Rs-485.
ROOM
RJ11 [4/4] Pin 1+2 and 3+4, Room Temp. Sensor [Optional]
[accessory]
1+
2-
RPM indication
0-10V DC OUT [max 5 mA].
Signal from controller indicates 0-100 % fan
speed.
Always active.
13
14
External heat control
0-10V DC IN.
Control heat 0-100 %.
Set parameter: Installer menu > External control
> 0-10V heating control = On
3+
4-
Heat indication [Actuator control]
0-10V DC OUT [max 5 mA].
Signal from controller indicates 0-100 % heat
step. Control signal to modulating actuator.
Always active.
15
16
External on/off
External voltfree [dry] contact. Closes to
activate system.
Set parameter: Installer menu > External control
> External On/Off = On
5
6
Outdoor sensor [Mandatory]
Outdoor Temp. Sensor [included].
17
18
Door contact [Mandatory]
External voltfree [dry] contact. Door Contact
Switch [included] or other contact [e.g. in BMS
or door automatic].
Door open = Closed contact
Door closed = Open contact
7
8
Setback temperature
External voltfree [dry] contact.
Close to activate night temperature.
Always active.
9
10
External alarm IN
External voltfree [dry] contact.
Closes to indicate an alarm. If used for filter
guard, set Parameter:
Installer menu > Filter guard > External filter
guard = On
Always active.
19
20
BMS Alarm out
Internal voltfree [dry] contact, max 3A, 230V.
Always active. Indicates alarm.
Closed contact = Alarm
Open contact = No alarm
11
12
External rpm
0-10V DC IN.
Control fan speed 0-100 %.
Set parameter: Installer menu > External
control > 0-10V Fan control = On
21
22
BMS indication OUT
Internal voltfree [dry] contact, max 3A, 230V.
Always active. Indicates operation.
Closed contact = In operation
Open contact = Not in operation
SchwankAir Controller