6
HumiTherm Ultra
User Manual
2 Pole
Isolating Switch
Fuse
1
DC Power
Source
+
-
+
2
-
Mains
Earth
3
Figure 2.5
[Optional] Standby Humidity (%RH) Transmitter Input
(Terminals : 14, 15, 16, 17)
[Optional] Standby Temperature (°C) Sensor / Transmitter Input
(Terminals : 18, 19, 20, 21)
The Control Unit optionally supports Inputs for Standby (redundant) Humidity & Temperature sensor / transmitter. The
Connection detail are the same as for main sensor / transmitter described above.
[Optional] Door Output
(terminals : 24, 25)
[Optional] Standby Set Select Output
(terminals : 26, 27)
[Optional] Main Set Select Output
(terminals : 28, 29)
[Optional] Standby Compressor Output
(terminals : 30, 31)
[Optional] Standby Humidifier Output
(terminals : 32, 33)
[Optional] Standby Heater Output
(terminals : 34, 35)
Main Compressor Output
(terminals : 36, 37)
Main Humidifier Output
(terminals : 38, 39)
Main Heater Output
(terminals : 40, 41)
Alarm Output
(terminals : 42, 43)
All the above control & alarm outputs are Voltage pulses (12VDC @ 40mA) for driving external SSR or Relay. The ‘+’ and ‘-’
terminals are for voltage ‘Source’ and ‘Return’ paths, respectively.
The Optional Outputs are fitted only if Controller is ordered with Standby Control Outputs.
[Optional] Standby Thermostat Digital Input
(Terminals 44,
)
46
[Optional] Standby Water Level Digital Input
(Terminals 45,
)
46
Main Thermostat Digital Input
(Terminals 47,
)
46
Main Water Level Digital Input
(Terminals 48,
)
46
Alarm Acknowledge Digital Input
(Terminals 50,
)
49
Power Fail Digital Input
(Terminals 51,
)
49
Door Open Digital Input
(Terminals 52,
)
49
(Terminals 46 & 49 are Common)
Potential-free contact closure input terminals are provided as digital inputs. An ‘Open’ or ‘Close’ switch position is detected as
input.
For reliable noise free communication, use a pair of twisted wires inside screened cable. The wire should have less than 100
ohms / km nominal DC resistance (Typically 24 AWG or thicker). Connect the terminating resistor (Typically 100 to 150 ohm)
at one end to improve noise immunity.
HMI
(Terminals 22, 23)
COMMUNICATION PORT
POWER SUPPLY
1
(Terminals , 2, 3)
As standard, the
is supplied with power connections suited
Module
for
to
V C
. The accuracy / p formance of the
18
32 D
power source
er
Module is not affected by the variations in the supply within sp cified
e
limits of
to 3 VDC. Use well-insulated copper conductor wire of
18
2
the size not smaller than 0.5mm² for power supply connections
ensuring proper polarity as shown in Figure
. The
is not
2.5
Module
provided with fuse and power switch. If necessary, mount them
separately. Use a
blow fuse rated for 0.5A current.
slow
For safety and enhanced electrical noise immunity, it is highly recommended to connect Main Power Supply ‘Earth’
to terminal 3.
