Devatec ElectroVap RTH-HC Series, Instruction & Operation Manual, Page: 26 / 64

ELECTROVAP
®
RTH-HC
26
3.8.2 Remote information board
The contact can be changed to NO or NC by wiring according to the following diagrams (e.g. wiring on 30 & 31 = NO
contact).
3.8.3 RS485 – Hardware connection
RS485 connection must be plugged on the J2 connector:
•
Terminal 1: Data -
•
Terminal 2: Data +
•
Terminal 3: GND
The SW1 switch is used to turn line resistance on or off. Depending on your
needs, these resistances can be activated or deactivated (see diagram).
X22 Connector (36-37-38): Remote
steam production dry contact.
X21 Connector (33-34-35): Remote
general fault dry contact.
X20 Connector (30-31-32): Remote tank
maintenance dry contact.
1
2
3
4
3
2
1
J2
SW1
On
Off
K4A
X10
Main board /
Carte
Principale
SW1
–2
J2
1 : Data
–
2 : Data +
3 : GND
+5V
680
SW1
–3
120
SW1
–1 680
Carte Principale /
Main board
Ref : 500102
X18
Ref 500400
500400
X23
X20
X22
X21
X20
30 31 32
X21
33 34 35
X22
36 37 38
NO NC NC
NC
NO
NO
Fig. B 3-8.
Fig. A 3-8.