Addendum Use Of Hardware Links On The Secondary Electronic - ABB 2600T Series Operating Instruction

ADDENDUM USE OF HARDWARE LINKS ON THE SECONDARY ELECTRONIC

The secondary electronic is shown in the figure. There are 4 dip switches located on the secondary electronics as indicated below;
they are used for settings when integral digital display is not available.
1
0
1 2 3 4
Switches 1 and 2 are used for Electronics or Transducer replace; Switch 3 is for Write Protect mode selection; Switch 4 is for Up/
Down Scale selection. Here below a description of the operations.
1
0
1 2
1
0
1 2
1
0
1 2
1
0
3
1
0
4
✶
NOTE: Typically the Up/Down scale mode is activated when there is a failure in the physical elements of the sensor
and on the electronics of the device, and more precisely:
1) Values in the sensor database are corrupted;
3) Values of Primary variables are out of limits;
5) ASIC - (Integrated circuit) of sensor is failed.
REPLACE
Usually switches 1 and 2 are down in "0" position.
They are moved when a replace operation is required.
Switch 1 up in "1" position is required before power up the transmitter, when a replace
is being performed. Switch 2 down in "0" position allows the replace of the transducer.
Switch 2 up in "1" position allows the replace of the secondary electronics.
It must be moved in this position, when electronics replace is being performed, before
power up the transmitter.
AFTER ANY REPLACE OPERATION IT IS RECOMMENDED TO MOVE
DOWN IN "0" POSITION THE RELEVANT SWITCHES.
WRITE PROTECT mode
With the switch 3 up in "0" position the write protect mode is active.
It is a way to protect the device from any change:
configuration data and parameters cannot be modified.
UP/DOWN SCALE mode
The switch 4 defines the fail safe output condition in case of transmitter failure:
- In the ON position the output is Down (below 4 mA)
- In the OFF position the output is UP (above 20 mA)
2) EEprom of Primary Electronic (sensor) is failed;
4) Digital to analog converter (DAC) circuit is out of range.
6) ASIC - (Integrated circuit) of electronics is failed.
✶
Note: After any
replace operation a "pre-
startup acceptance test"
must be performed.
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