Specifications

Hardware Characteristics
IM/265/7/9/ADD/FF-EN_01 Connection to FOUNDATION Fieldbus 13
5 Hardware Characteristics
5.1 Current limitation
This electronic implements also an especial circuitry for the current limitation. Whenever a fatal
failure occurs and the current consumption increase over the 19 mA, this circuitry provides a
limitation of the current to 19 mA, in order to save the good functionality of the other connected
devices that otherwise would be switched off due to the missing power available.
5.2 Local Display
The 2600T FF Pressure Transmitter is available with an integral display as optionally item, see
Fig. 1. This integral display offers the possibility to
display the selected variable or diagnostic
strings whenever failure and / or warnings are detected.
The variable to be displayed is user selectable among several variables produced in the TB as
well as the Function Blocks output in Engineering Value, or its percentage. It is selected writing
the right code in the RB_METER_OPTION. See the Ressource Block table in 10.2 Resource
Block.
-
If the transmitter works correctly, the variable selected in the RB_METER_OPTION is
displayed together with the unit code, and it is updated periodically. If the value is too high to
show, “OVERFLOW” is displayed.
- When some malfunctions are detected, on the display appears the following diagnostic string
sequences: “ALARM”.
The first column of the second row shows some special characters in cyclic order. These
characters are the number of the shown value, write protection, transfer function, status
available and EEPROM burning active.
Below the displayed value is a percent bar. The value there displayed is the OUT value of the
AI1 FB at normal transmitters or the mass flow (norm volume flow) at multivariable transmitters.
The display acts also as feedback of the operations performed with the external push buttons,
for additional display indications see the "structure tree" on page 15.
M00504
Fig. 1: Integral local display