Spectrum Controls 1769sc-HART Modules - Manual (Page 9)

User’s Manual 0300217-03 Rev. A
Chapter 1
Module Overview
This chapter describes the 1769sc-OF4IH isolated HART analog output module. The
module provides four isolated current outputs with HART communication.
Included is information about:
 The module’s hardware and diagnostic features
 An overview of the system and module operation
 Compatibility
Section 1.1
General
Description
The OF4IH is a four channel isolated module that allows each channel to be configured
independently for either 0 to 20mA or 4 to 20mA with or without HART communication.
The module converts the digital value stored in each channel’s output command word
(i.e. output words 0 to 3) to an analog current signal. If HART is enabled on a specific
channel, the user also has the ability to send and receive HART communication to and
from the connected HART device. HART data is sent and received using the module’s
input and output image table. Over-range/under-range detection and indication is also
provided by the module for each channel..
The table below lists the output ranges for the module.
Table 1-1
C u r r e n t Ou tp u t T yp e s
0 to 20mA
4mA to 20mA
Section 1.2
Data Formats
The data format can be configured for:
 Engineering units
 Scaled-for-PID
 Percent of full-scale
 Raw/proportional data