Installation and Operation Guide | DGS Modbus
RS8HJ102 | 9
© Danfoss | ADAP-KOOL® | 2016.12
Item
Description
Enclosure Access
To open the IP41 Sensor enclosure:
turn the cable gland ½ turn anticlockwise to loosen the internal
gland nut, depress the clip on top of the enclosure and open. Reverse to close.
With DGS-SC a retention strap fixates the sensor element during transportation. Remove it after open-
ing the sensor enclosure by pulling the tap of the retention strap.
IP66
is open and closed with a Torx size TX25. It is supplies without any retention strap.
Power
12-24V AC/DC, connect at positions 0V and +V at connector block CN1.
• For AC: Jumper J1 is on, J2 is off.
• For DC: Jumper J1 is off, J2 is on. (Default factory setting is DC.)
Use 2 wires, typically 18 AWG (minimum).
Output
Connect two wires to terminal block CN2 positions 0V and V or I for voltage or current, respectively.
• Connect 4-20mA at CN2 positions 0V and I
• Connect voltage output at CN2 positions 0V and V
Alarm relay
The digital alarm output signal is connected at connector block CN3
The alarm relay may be operated with or without fail safe function.
When the fail-safe function is enabled, the relay will give an alarm if the power is disconnected from the
DGS unit.
Most products are supplied with the fail-safe function disabled (see separate Datasheet for details).
It is possible via the Modbus interface to disable and enable the fail-safe function.
N/O
Normally Open
When operated without fail-safe, the ‘N/O’ and ‘COM’ terminals are used.
COM Common
N/C
Normally Closed When operated with fail-safe, the ‘N/C’ and ‘COM’ terminals are used.
Modbus (RS-485)
The Modbus connector is CN4.
G
Ground
Galvanically separated
-
A (Rx/Tx)
Modbus non-inverting signals
+
B (Tx/Rx)
Modbus inverting signals
See section 4.4 for details on system integration.
