PPT2-0001DRF2VE datasheet, PDF

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PPT2-0001DRF2VE: DescriptionPPT2 MV 2V 1FS -55TO110 1PSID; CategoryThe sensor; File Size1MB，85 Pages; ManufacturerHoneywell; Websitehttp://www.ssec.honeywell.com/

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PPT2-0001DRF2VE Overview

PPT2 MV 2V 1FS -55TO110 1PSID

PPT2-0001DRF2VE Parametric

Parameter Name	Attribute value
pressure type	difference
work pressure	1 PSI（6.89 kPa）
Output type	Analog, RS-232
output	0 V ~ 5 V
Accuracy	±0.075%
Voltage - Power	6 V ~ 34 V
Port size	Male - 0.13" (3.18mm) conduit, filter
Port style	Barbed, filtered
characteristic	-
Terminal type	Connector
maximum pressure	600 PSI（4136.85 kPa）
Operating temperature	-55°C ~ 110°C
Package/casing	Module size
Supplier device packaging	-

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Honeywell Precision Pressure Transducer 2

PPT2 User’s Manual

ADS-14221, PPT2 User Manual

October, 2016

1.0 Product Overview

The Honeywell Model PPT2 Precision Pressure Transducers provide high accuracy pressure readings in both

digital and analog form. The first-time user will be able to use the PPT2 within minutes, yet capability exists to

configure the PPT2 to optimize performance in the User’s specific applications. Throughout this User’s Manual,

the PPT2 may be referred to as Precision Pressure Transducer.

The heart of the PPT2 measuring system is a silicon piezoresistive sensor which contains both pressure and

temperature-sensitive elements. Digital signals representing temperature and pressure are processed by the

PPT2 microprocessor to produce calibrated, temperature-compensated pressure readings over the entire

operating temperature and pressure range.

Both the analog and digital outputs are internally corrected over the full operating range. The PPT2 has a digital

accuracy of 0.075% of full scale (FS). Note that full scale for a 20 psig and a 20 psia is 20 psi, but for a 20 psid it

is 40 psi, the sum of + Full scale and – Full Scale. This is important to note when determining the accuracy

allowance.

The PPT2 receives commands and sends digital data using either an RS-232 serial port or a multi-drop RS-485

serial port of a computer. (Note: many newer computers will have only USB ports, no RS-232 or RS-485 ports. A

USB converter can be used to provide the required RS-232 or RS-485 port.)

Using the RS-232 type PPT2, up to 89 units can be connected in a ring configuration to a single serial port of a

computer. The RS-485 type PPT2 allows up to 89 PPT2’s to be connected to a two-wire multi-drop bus. Group

(multicast) addressing allows up to nine groups of PPT2’s to be addressed with a single command. Global

(broadcast) addressing will send a command to all PPT2’s on the serial bus.

Any computer having a serial port and terminal emulation software can be connected to the PPT2 to allow the

user to set baud rates, reading rates, reading resolution, units of pressure and other choices. (User modified

functions must be set through the digital interface, using a computer with a serial port). The user-modified

functions may either be used temporarily, until the PPT2 is powered down, or may be stored in the PPT2 internal

EEPROM to automatically configure the PPT2 each time power is applied.

Analog output from the PPT2 16-bit digital-to-analog converter may be obtained without a host computer.

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ADS-14221, PPT2 User Manual

October, 2016

2.0 Getting Started

2.1

OVERVIEW

The first-time user should approach the PPT2 in a manner analogous to using a word processor program; i.e.,

many features are available but one may begin by using only those of interest at the moment.

As shipped from the factory, the default settings provide a pressure transducer that will be usable for many

applications. Once the user is familiar with the performance and command structure, changes may be made and

stored using the ‘Store Parameters’ (SP) command. Once stored, the user-defined settings are activated each

time the PPT2 is powered up. This tailors the performance of the PPT2 to meet the needs of a particular

application.

2.2

EQUIPMENT NEEDED

To prepare the PPT2 for operation, three items are needed:

• A mating connector with proper wiring connections (see connector part number and wiring diagrams in

Section 6);

• A DC power supply;

• A source of pressure that is properly matched to the range and type of the PPT.

To operate the PPT2 in the analog output mode, one additional item is needed:

•

Voltage Output

- A five digit voltmeter with 0-5 volt range connected between Analog Out and Signal

Common. A computer is not required to read the Analog output.

To operate the PPT2 in the digital output mode, one additional item is needed:

• A computer, or host processor, having an RS-232 or RS-485 serial port (or suitable USB adapter) and

terminal emulation program.

The wiring diagram designates which PPT2 pins must connect to the computer “send”, “receive” and

“common” pins for proper communications.

2.3



TERMINAL PROGRAM SETTINGS

Enter the following settings in the terminal program:

Baud Rate:

Start Bits:

Data Bits:

Stop Bits:

Parity:



9600

None

Attach a line feed to the carriage return.

Turn the local echo ON.

When shipped from the factory, the PPT2 is set to a baud rate of 9600, 1 start bit, 8 data bits with no parity and 1

stop bit. If the baud rate has been subsequently changed, and is unknown, it will be necessary to search all baud

rate values to reestablish communication. See the BP command description in Section 5 of this manual for

possible settings.

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