5.4 Electrical connection
Supply voltage + 12 … + 24 V
DC
(±10 %)
Power consumption max. 7 W
Notes:
Before electrical connection to a data logger/controller, the OTT ecoN
operating parameters must be set; see Chapter 6.
Do not shorten the OTT ecoN connecting cable or remove the M12 connector.
Connect using the connecting cable with open ends and M12 socket (see
"Accessories").
For cable lengths > 10 meters (with extension cable), the supply voltage
must be + 24 V
DC
(voltage drop).
Risk of damage to the OTT ecoN
The supply voltage must be connected with the correct polarity. Check this
before applying the supply voltage.
Connect the connecting cable with open ends (M12 socket) to the OTT ecoN
connecting cable (M12 connector). Please note: The M12 industrial connectors
are not pressure water tight
➝
Not suitable for use under water (degree of pro-
tection: IP 67).
Connect the red wire to the supply voltage (+12 … 24 V
DC
).
Connect the blue wire to earth (GND).
Connect the brown wire to the RS-485 (B) interface on a Modbus master.
Connect the white wire to the RS-485 (A) interface on a Modbus master.
If required: connect braided shield.
With electrically isolated OTT ecoN and Modbus master voltage supplies: Also
loop the earth (GND) connection through to the RS-485 interface.
The OTT ecoN is ready to operate as soon as the supply voltage is switched on.
Note:
When connecting an OTT ecoN that is not continuously supplied with
voltage to an OTT netDL, a boot up time of 90 seconds is required!
Fig. 7: Wire assignment in connecting
cable with open ends.
Connecting cable
red
+12 … +27 V
DC
blue GND
brown RS-485 D+ (B)
white RS-485 D– (A)
not
used
Braided shield
14
