Devatec ElectroVap ELMC 1 SM CYL Technical Manual page 34

The wiring of the optional equipment described under must be made with 0.75 mm2 flexible
shielded cable.
REMOTE INFORMATION BOARD (OPTION)
MODBUS connection - RS485 - Hardware connection
Speed of the communication
Packet size
parity
Stop bit
Timeout response
Time between requests (after response received).
To read the status of humidifiers, there is a maximum of registers that can be sent per unit:
- ELMC, maximum 5 can be read in one request.
You must use the smaller number of register if multiple type of units are on the same BUS.
ALL WORKS CONCERNED WITH ELECTRICAL INSTALLATION MUST BE CARRIED OUT BY A SKILLED AND QUALIFIED PERSONNEL
.
E
LECTRO
Installation - Step 5
Contact can be modified in NO or NF by wiring as per the
following schemes (ex: wiring on 30 & 31 = NO contact).
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. I most of the case,
those resistor are useless and should be disabled.
See after on the right hand side
the diagram of connection:
Communication settings
Some settings are really important for a great communication with Devatec humidifiers.
V MC2
AP
NO NF NO
30 31 32 33 34 35
X22 connector (36-37-38): Remote steam pro-
duction dry contact.
X21 connector (33-34-35): Remote general
fault dry contact
X20 connector (30-31-32): Remote cylinder
maintenance dry contact
9600 Bauds/sec (changeable)
8 bits
No parity
1
2500ms (2.5sec)
Min. 100ms
34
NF NO NF
36 37 38
Pictures for illustrating purposes only