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Pictures for illustra tive purpos es
REMOTE INFORMATION BOARD (OPTION)
X20 connector (30-31-32): Remote cy linder
maintenance dry contact
X21 connector (33-34-35): Remote general
f ault dry contact
X22 connector (36-37-38): Remote steam
production dry contact.
The w iring of the optional equipment described under must be made w ith 0.75 mm2 flexible cable.
NO
NF
30 31 32
X20
NO
NF
33 34 35
X21
NO
NF
36 37 38
X22
Contact can be modified in NO or NF by wiring as per the
following schemes (ex: wiring on 30 & 31 = NO contact).
E
LECTRO
V
AP
RTH-LC
Connecting options - RS485 outlet
MODBUS connection - RS485 - Hardware connection
The RS485 connection must be plugged on the J1 connector (see pic.) :
Terminal 1 : Data –
Terminal 2 : Data +
Terminal 3 : Signal Ground
The S37 switch is use to enable or disable
the line resistor. In most of cases, those
resistors are useless and should be dis-
abled.
Speed of the communication
9600 Bauds/sec (changeable)
Packet size
8 bits
Parity
No parity
Stop bit
1
Timeout response
2500ms (2.5sec)
Time between requests (after response receiv ed).
Min. 100ms
Nb of register per request
5
ALL WORKS CONCERNED WITH THE ELECTRICAL INSTALLATION MUST BE CARRIED OUT BY SKILLED AND QUALIFIED PERSONNEL.
Communication settings
Some settings are really important for a great communication with Devatec humidifiers.