A P P L I C A T I O N N O T E
E 9 T U S A G E I N I N D U S T R I A L F I E L D
A P N t 0 2 6 E 9 TU I F
E N R e v .1 . 1
T U R B O s . r .l .
D u s t F i l t e r C o m p o n e n t s
V i a C e n t r o I n d u s t r i a l e E u r o p e o , 3 3
–
T u r a t e ( C O ) I t a l y
T e l + + 3 9 0 3 6 2 5 7 4 0 2 4 F a x + + 3 9 0 3 6 2 5 7 4 0 9 2
1 8
Connect E9T control unit to an external device
When the E9T control unit is part of a complex machine that is controlled through the use of a PC, a PLC or a DCS,
then it is necessary to make the right connections in order to use all the functions it has available.
Depending on the equipment that the complex system makes available and on the specific needs that the
customer requires, the E9T can be connected in several ways, starting from reading only the emission value on a
4-20mA current-loop line up to communicating via ModBus to have full control of the control unit.
Here are some possible usage scenarios, complete with connection diagram.
Remotely read emission values via 4-20mA line
The easy way to remotely read dust emission values measured by the E9T control unit is to connect an external
device provided of 4-20mA current-loop input.
Please read
for more information about wiring connection.
The external device analog input will be configured to read 4-20mA current-loop in PASSIVE mode.
In case the 4-20mA setting is not available, the user will configure the analog input as dc voltage input and place a
250 Ohm 1/2W resistor between input terminals. With this, the user will need to set the measure scale between
1Vdc (4mA) and 5Vdc(20mA) on the external device.
The measurement scale is linear and corresponds to:
Current
loop
Emission
value
Note
4,00mA
0 mg/m
3
20,0mA
50 mg/m
3
Emission full scale for a standard triboelectric probe.
If an analog triboelectric probe is used, the emission full scale depends on J1 jumper
setting. Please refer to documents relating to the triboelectric probe used.
The external device should be properly programmed to manage the emission value received from E9T control unit
in order to display value and handle alarms.
