S+S Regeltechnik Hygrasreg RH-30 Operating Instructions, Mounting & Installation page 7

G
Mounting and Installation
Switching output
Switching output 1
Gone below
preset
switchpoint
threshold
11
12 13
Switching back when humidity
falls below preset limit value
with 3% r.H. hysteresis
Mode 1: Switch points for both relay outputs can be defined independent from each other in the range of 5...95 % r. H. by turning control
knobs (setpoint 1 for relay 1, setpoint 2 for relay 2, see schematic diagram). When the respective switch point 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: 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 turning control knob setpoint 1 (see schematic diagram). The switch point for the second relay output is in mode 2
invariably defined as "switch point 1 + 5 % r. H." A hysteresis of 3 % r. H. is predefined for each switching output also in mode 2.
Schematic diagram
1 2 3
for relay 1
13 NO
11 COM
12
NC
R2
5% 95%
22 21 23
for relay 2
Zero point calibration
The sensors are pre-set and calibrated at the factory.
Adjustment is possible using the offset potentiometer.
Range of adjustment: approx. ± 10 % r.H.
Supply
→ 1
→ 4
12 (A1) →
11 (W1) →
13 (B1) →
22 (A2) →
21 (W2) →
23 (B2) →
11
12 13
Preset
switchpoint
threshold
Hysteresis
exeeded
3% r.H.
Relative humidity
Behaviour when preset
limit value is exeeded
NC =
Normally Closed
COM =
Common
NO =
Normally Open
DIP 1
ON = Mode 2
OFF = Mode 1
DIP R1 R1 extended
to the outside
ON
(adjustment
1
5% 95%
wheel)
Switching thresholds
relative humidity for
relay 1 and relay 2
AC
24 V∼ 24 V DC
0 V
Relay 1 Breaker contact
Relay 1 Changeover contact
Relay 1 Normally open contact
Relay 2 Breaker contact
Relay 2 Changeover contact
Relay 2 Normally open contact
Gone below
preset
switchpoint
threshold
21
22 23
Switching back when humidity
falls below preset limit value
with 3% r.H. hysteresis
RH - 30 - U
READOUT IN THE DISPLAY
○
Circuit, empty = relay in idle state
●
Circuit, full
In the 1st line of the display, the ACTUAL relative humidity
is displayed. Resolution: 1/10 % r.H.
The second line displays the information regarding
the switching status of the relay (as a circuit) as well as
a readout of the switching value in % r. H.
(adjustable using the corresponding potentiometer).
The readouts of the switching thresholds for
the first and second relay are displayed alternately at
an interval of twenty seconds.
DC
Setting the relay 1 threshold value (for RH - 30 WU)
For the variant without a potentiometer leading out to
GND
the thumb wheel, relay 1 is set using the inserted direction
of rotation indicator.
If the notch is pointing upwards, 50 % r. H. is set as
the switching value for relay 1.
The left-hand limit stop defines the switching value as
5 % r. H. The right-hand limit stop as 95 % r. H.
See figure on the last page!
Switching output 2
21
22 23
Preset
switchpoint
threshold
Hysteresis
exeeded
3% r.H.
Relative humidity
Behaviour when preset
limit value is exeeded
Relay switching value
Relay switching status (
Relay displayed (1 ⁄ 2)
= relay energised
RH - 30
● ○)
⁄