sauter NRT407, Manual

Page: 22 / 76

22 Part II Installation NRT407 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 NRT tool.
30 AI1 For an external room 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 Sauter condensation detector, EGH102 (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.
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 4. I/O connection terminals for CO2 control and fan control