S+S Regeltechnik HYGRASREG RHT-30 Notice D'instruction page 7

G
Mounting and Installation
Switching output
Gone below
preset
switchpoint
threshold
11
12 13
Falls below
the preset value with
3% r.H./1K hysteresis
Mode 1: Independent switchpoints for both relay outputs can be defined in the range of 5...95 % r.H. by the control knobs (setpoint 1 for relay 1, set-
point 2 for relay 2, see schematic diagram). When the respective switchpoint is exceeded, the corresponding relay switches over (changeover contact 1
switches from position 2 to position 3). When the pre-set switchpoint is undershot again by more than 3 % r.H. (hysteresis), the respective switching
output switches back to the initial position (changeover contact 1 switches from position 3 to position 2).
Mode 2: In Mode 2, only control knob setpoint 1 is active (setpoint 2 without function)! The switchpoint for the first relay is defined in the range of
5...95 % r.H. by the control knob setpoint 1 (see schematic diagram). The switchpoint for the second relay output is invariably defined in mode 2
as "Switchpoint 1 + 5 % r.H.". Hysteresis of 3 % r.H. is also predefined for each switching output in mode 2.
Mode 3: Independent switchpoints for both relay outputs can be defined in the range of +5...+45 °C r.H. by the control knobs (setpoint 1 for relay 1,
setpoint 2 for relay 2). If the respective switchpoint is exceeded, the corresponding relay switches over. If the pre-set threshold value is undershot again
by 1 K (hysteresis), the respective switching output switches back to the initial position. The thresholds of the setting range (temperature) are 5 °C
above the minimum or below the maximum range value respectively.
Mode 4: In mode 4, the control knob is allocated to setpoint 1 of the temperature, while control knob is allocated to setpoint 2 of the relative humidity. The
switchpoints can be adjusted in the range of +5...+45 °C or 5...95 % r.H. The thresholds of the setting range (temperature) are 5°C above
the minimum or below the maximum range value respectively. The control knob for the temperature can be operated from outside, if necessary.
Relay switching value
Relay switching status (
Relay displayed (1 ⁄ 2)
Display readout
The 1st line of the display shows the ACTUAL humidity in % r.H. and the ACTUAL
temperature in °C. The displays showing the ACTUAL values alternate in a 3-second
rhythm. Resolution: 1/10 % r.H. or 1/10 °C.
The 2nd line shows information about the switching status of the relay (as a circuit),
and indicates the switching value in % r.H. or °C (adjustable via the corresponding set
potentiometer). The readouts of the switching thresholds for the first and second relay
are displayed alternately at an interval of twenty seconds. For improved legibility,
backlighting is provided.
Zero point calibration
The sensors are pre-set and calibrated at the factory. Adjustment is possible either for
temperature or relative humidity, depending on the output allocation (DIP switch 3).
Range of adjustment: approx. ± 10 % r.H. or ± 5 K.
Internal setting of the switching value for relay 1 (at RHT - 30 WU)
The variant without a potentiometer leading out to the thumb wheel requires the switching
value for relay 1 to be set using the inserted direction of rotation indicator.
If the notch is pointing upwards, the switching value is set to 50 % r.H. or + 25 °C.
The left stop defines the switching value to 5 % r.H. or + 5 °C,
the right stop defines it to 95 % r.H. or + 45 °C.
See illustration on last page!
Switching output 1
11
12 13
Preset
switchpoint
threshold
Hysteresis
exeeded
3% r.H./1K
°C / % r.H.
Exceeding
the preset value
○
Circuit, empty =
relay in idle state
● ○)
⁄
●
Gone below
preset
switchpoint
threshold
21
22 23
Falls below
the preset value with
3% r.H./1K hysteresis
Circuit, full =
relay energised
Switching output 2
21
22 23
Preset
switchpoint
threshold
Hysteresis
exeeded
3% r.H./1K
°C / % r.H.
Exceeding
the preset value
Supply AC
→ 1
24 V∼
→ 3 0 V
12 (A1) → Relay 1 Breaker contact
11 (W1) → Relay 1 Changeover contact
13 Relay 1 Normally open contact
(B1) →
22 (A2) → Relay 2 Breaker contact
21 (W2) → Relay 2 Changeover contact
23 (B2) → Relay 2 Normally open contact
DIP switches
Function mode
Mode 1 (2x 5...95 % r.H.)
Mode 2 (5...95 % r.H. + 5 % r.H.)
Mode 3 (2x +5...+45 °C)
Mode 4 (5...95 % r.H. / +5...+45 °C)
Output
Temperature
Relative humidity
Backlighting
activated
deactivated
Rev. 2017 - V20 GB
RHT - 30
DC
24 V DC
GND
RHT - 30
DIP 1 DIP 2
OFF OFF
O N
OFF
O N
OFF
O N O N
DIP 3
O N
OFF
DIP 4
O N
OFF