22
Figure 12.5
Figure 12.6
The controller is supplied with power connections suited for 85 to 264 VAC line supply. Use well-insulated copper conductor
2
wire of the size not smaller than 0.5mm for power supply connections. Connect Line (Phase) supply line to terminal 12 and the
Neutral (Return) supply line to terminal 13 as shown in Figure 12.5 above. The controller is not provided with fuse and power
switch. If necessary, mount them separately. Use a time lag fuse rated 1A @ 240 VAC.
SERIAL COMMUNICATION PORT
(Terminals 14 and 15)
If the optional plug-in communication board is fitted, connect terminal 15 and 14 of the controller to (+) and (-) terminals of the
Master device for RS485 port. In case of RS232 port connect terminal 15 to TXD (Transmit), Terminal 14 to RXD (Receive) and
Terminal 10 to GND (Ground).
To ensure reliable operation of the Serial Communication Link (without data corruption due to line noise or reflections), use a
pair of twisted wires inside screened cable with the terminating resistor (100 to 150 Ohms) at one end, as shown in Figure 12.6
below.
Relay
Potential-free Relay changeover contacts N/O (Normally Open), C (Common) and N/C (Normally Close); rated 2A/240 VAC
(resistive load) are provided as Relay output. Use external auxiliary device like contactor with appropriate contact rating for
driving the actual load.
Drive for SSR
DC Voltage level is generated for switching the external SSR (Solid State Relay). Connect (+) and (-) terminals of SSR to
controller terminals marked (+) & (-), respectively.
POWER SUPPLY
(Terminals 12 and 13)
User Manual
HumiTherm-c (Dry-Wet)
Line
Neutral
12 (L)
13 (N)
2 Pole
Isolating Switch
Fuse
Power Supply
Terminal
Terminating Resistor
Screened Cable
Twisted
Wire Pair
(100 to 150 Ohms)
14 (B-)
15 (B+)
HOST
B-
B+
Master Device
Serial Comm.
Terminals
