Yokogawa EJA310A - Manual (Page 2)

2
FGP-502
Copyright 2009
1st Edition 01/2009
Example: If an EJA110A or EJA110A with Namur NE43 analog
output signal is ranged for 0 to 100 inH
2
O (4 to 20mA).The
transmitter is capable of measuring and transmitting an output
signal of -1.25 to 103.1 inH
2
O (3.8 to 20.5mA).
Fault Condition
Standard and Namur NE43 Analog Output
Both the Standard and Namur NE43 analog output signals have
defined a Hardware Failure as a Fault Condition. Preset values
have been assigned upon hardware failure. Once the transmitter
diagnostics have detected a Hardware failure, the analog signal
immediately changes to this value. The customer can chose
between two different presets.
Down-Scale Burnout
Down-scale Burnout refers to the transmitter outputting a -5%
(3.2mA) signal (“Down-Scale”) at hardware failure (Burnout).
Up-Scale Burnout
Up-scale Burnout refers to the transmitter outputting a 110%
(21.6mA) signal (“Up-Scale”) at hardware failure (Burnout).
The Up-Scale and Down-Scale Burnout can be set in the field via a
jumper or switch located on the CPU assembly board in each
transmitter. Refer to the Instruction Manual for the specific
transmitter for information on accessing the CPU assembly board.
Once the CPU assembly board is located, the jumper or switch can
be set as follows:
Ensure that the control unit receiving the analog signal is setup to
recognize these settings as a fault condition.
Factory Settings
Standard and Namur NE43 Analog Output
The factory can set these parameters during assembly using the
following option codes.