Azbil AVP300 - Structure of System with Travel Transmission (Analog Output); Structure of System with Travel Transmission (Digital Output)

1-4
1.2.2 Structure of system with travel transmission (analog output)
This figure shows an example of the structure of a system in which the position detected
by the device is output as a 4–20 mA DC analog signal.
In this system structure, the analog signal from the device is directly output to the host
monitoring system.
250 Ω 24 V DC
I
OUT
I
OUT
I
IN
I
IN
Figure 1-3. Structure of System with Analog Output (Models AVP301 and AVP201)
1.2.3 Structure of system with travel transmission (digital output)
This figure shows the structure of a system in which the position detected by the device,
the values of the device settings, and the results of self diagnostics are output in the DE
(Digital Enhancement) protocol* for digital signal transmission.
In this system structure, the digital signals in the DE protocol* transmitted from the de-
vice are output to a monitoring system that is capable of directly inputting these signals.
Figure 1-4. Structure of System with Digital Output (Models AVP301 and AVP201)
STIM II (Smart Transmitter Interface Module)
• An interface module for digital signals based on the DE protocol.*
PM100 (process controller, R20 or later)
• A process controller on the UCN. Simultaneously performs functions such as
adjustment control, sequencing, calculation, process I/O, etc.
Caution
•
If the device outputs the travel transmission output signal as a PV using the STIM
II, be sure to set the valve forced fully closed value (SHUT OFF) to −0.2 % or
greater so that the value of the process variable for the position signal STI point will
not be BadPV.
* DE and the DE protocol are registered trademarks of Honeywell International, Inc. in the United
States.