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Preferred Instruments

Preferred Instruments manufactures microprocessor based controllers, instruments, and electric actuators for combustion and process applications. Preferred Instruments also manufactures oil tank gauging and leak detection equipment. A major component of the Instrument group sales is from control systems integration and personal computer based Supervisory Control and Data Acquisition systems. Preferred Utilities' industrial factory is located in Danbury, CT

QA-16 Data Acquisition System

The QA-16 is an inexpensive 16-point data acquisition system for use on single burner, and small multiple burner combustion systems. Two versions of the controller are made; the QA-16 has 8 discrete (120 VAC) inputs and 8 analog (0 to 12 VDC) inputs. The QA-16D version has 16 discrete inputs and no analog inputs. The QA-16 interfaces with the QD485 LCD display to provide programmable, customized status, diagnostic, and troubleshooting messages. Two QA-16 processors can be combined to double the amount of available I/O.

Overview

The QA-16 is an inexpensive sixteen point data acquisition system for use on single burner, and small multiple burner combustion systems. The QA-16 interfaces with the 5003-QD485 LCD display to provide programmable, customized status, diagnostic, and trouble shooting messages. First-out annunciations and other messages can be customized to fit the application. Unlike typical annunciators, the QA-16 can receive flame input and other analog signals to provide visibility for these inputs as well.

Features

QD485 Display Features

  • 2 x 16 segment back-lit display with NEMA 4 membrane front and sealing gasket
  • Optional History Logging of past Alarm occurrences
  • Optional RS485 communication Interface
  • Non-volatile memory (10 years)
  • Operator interface key pad on front of unit
  • 1/8th DIN standard size for easy mounting in control panels
  • Built-in 120 VAC 50/60 Hz supply

QA-16 Features

  • Digital annunciation of up to 8 discrete inputs and 8 analog inputs (QA-16) or 16 discrete inputs only (QA-16D).

Specifications

QA-16

Microprocessor Data Acquisition System: System shall be capable of monitoring up to 8 discrete (limit) inputs and up to 8 analog (flame signal) inputs. First-out annunciation and English language messages shall be indicated on a 2 x 16 LCD display suitable for flush-mounting in an enclosure front. The controller shall provide historical logging of past alarms and communicate via RS-232 connection. Display messages and trip logic shall be customizable for each application. One relay output shall be supplied to provide a common alarm contact, trip indication, or other external function. For increase input/output capability, two data acquisition modules shall interface to a common display, providing a total of sixteen discrete inputs and sixteen analog inputs.

Manufacturer: Data acquisition system shall consist of one or two Preferred Instruments QA-16 modules interfaced to a Preferred Instruments QD485 display module. System shall be programmed by Preferred Utilities Mfg. of Danbury, CT.

QA-16D

Microprocessor Data Acquisition System: System shall be capable of monitoring up to 16 discrete (limit) inputs. First-out annunciation and English language messages shall be indicated on a 2 x 16 LCD display suitable for flush-mounting in an enclosure front. The controller shall provide historical logging of past alarms and communicate via RS-232 connection. Display messages and trip logic shall be customizable for each application. One relay output shall be provided to provide a common alarm contact, trip indication, or other external function. For increase input/output capability, two data acquisition modules shall interface to a common display, providing a total of sixteen discrete inputs and sixteen analog inputs.

Manufacturer: Data acquisition system shall consist of one or two Preferred Instruments QA-16D modules interfaced to a Preferred Instruments QD485 display module. System shall be programmed by Preferred Utilities Mfg. of Danbury, CT.