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Endura ACA592
Toroidal conductivity transmitter
4.6 Power Supply Requirements
Warning.
The connection terminals accept cables with a maximum peripheral wire cross-section of 2.5 mm
12 SWG (10 AWG).
Switch off the power supply before connecting the transmitter.
Notes.
To ensure the sensor cable length is sufficient, allow an additional 100 mm (4 in.) of cable to pass
through cable glands and into the housing.
Use stranded conductor material for the power supply cable.
Ensure the connecting cable is flexible.
Do not use a rigid conductor material as this can result in wire breaks.
4.6.1 Standard Application
When connecting ACA592–XX transmitters and power supplies in non-hazardous areas, observe the
following specification:
U
U
+ 0.022A x R
Smin
Mmin
Where:
U
– Minimum operating voltage of transmitter
Mmin
(refer to technical data for transmitter)
U
– Minimum supply voltage of power supply/SPS input
Smin
(refer to technical data for transmitter)
R
– Line resistance between transmitter and power supply
Ltg
For HART functionality, use power supplies or SPS input cards with HART mark. If this is not possible, the
interconnection must have a resistance. 250 is required by HART standard.
Earth (ground) connection – when connecting the earth (ground) (minus side), ensure that only one side of
the contact is connected to an equipotential bonding system.
Fig. 4.6 Standard Application
32
Ltg
Transmitter
+
U
Mmin
–
R
Control Room
+
U
Smin
–
Ltg
Power Supply /
SPS Input with Supply
4 Electrical Installation
OI/ACA592/TC–EN Rev. B
2
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