26
Chapter 6
Installation
Regio Midi manual
Terminal Designation
Operation
24
UO2
Control output heating, cooling (FS) or heating or cooling via change-over.
For a 0...10 V DC valve actuator, max 5 mA (FS). The valve actuator’s 0…10
V control signal terminal is connected to terminal 24 and its supply terminals to
terminals 10 and 11. Make sure that the reference pole G0 is connected to the
correct terminal on the actuator.
alternatively
For a 24 V AC thermal actuator, max 2.0 A. The thermal actuator is connected
between terminals 24 and 20, GDO.
alternatively
For a 24V AC actuator with spring return, max. 2.0 A. The actuator is
connected between terminals 24 and 20. This can be configured either through
the display or through Regio tool
©
.
30
AI1
For an external room sensor or supply air temperature limitation sensor,
PT1000. Measuring range 0...50°C. The sensor is connected between terminals
30 and 41, AGnd.
31
AI2
For a 0…10 V CO2 sensor
alternatively
Flow input
alternatively
0…10 V input
32
DI1
Occupancy detector. A potential-free contact is connected between terminals 32
and 40, +C. Closed contact corresponds to occupancy.
alternatively
Window contact (DI). A potential-free contact is connected between terminals
33 and 40, +C. Closed contact indicates closed window.
alternatively
Change-over.
33
DI2/CI
Regin’s condensation sensor, KG-A/1 (FS). The sensor is connected between
terminals 33 and 41, AGnd.
alternatively
Window contact (DI). A potential-free contact is connected between terminals
33 and 40, +C. Closed contact indicates closed window.
alternatively
Change-over.
alternatively
Run indication from e.g. an air handling unit. A potential-free contact is
connected between terminals 33 and 40, +C.
40
+C
24 V DC out common for DI and UI (with digital function)
41
AGnd
Analogue ground, reference for AI and UI (with analogue function)
42
A
RS485-communication A
43
B
RS485-communication B
Table 8. I/O connection terminals for CO2 control and fan control