Pressure Transducer and Transmitter Wiring Explained

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⌚Timestamps:

00:00 - Intro
00:35 - Transducer and transmitter
01:04 - Pressure switch
01:23 - Pressure transmitter
01:41 - Pressure transmitter wiring
02:34 - Wiring pressure switch to PLC
03:51 - Wiring pressure transmitter to PLC
06:07 - Wiring example

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In this video, we’re going to show you how to wire a few different transducers and transmitters to digital and analog PLC input modules.

We’re also going to analyze a typical instrument field-wiring drawing to show you how PLCs are properly configured for different transducer and transmitter types.

A transducer is a device that converts one form of energy to an electrical or electronic signal.
A Pressure switch is a two-part device consisting of a sensing transducer and an electrical switch.

A pressure switch is a digital device because it has only two possible conditions – open or closed. It is therefore connected to a PLC digital input module.

A Pressure Transmitter is a two-part device consisting of a sensing transducer and a circuit that transmits a standard instrumentation electrical signal representing a physical variable being measured. In most applications, the electrical signal is 4 to 20 mA.

A Pressure Transmitter is an analog device and is therefore connected to a PLC analog input module.

Many people refer to this device as a Transducer. For the sake of simplicity, we’ll continue to refer to it as a Transmitter.

A Pressure Transmitter requires a power supply to operate. Most Pressure Transmitters are two-wire types. Transmitters are also available as four-wire types.

As the name suggests, a two-wire pressure transmitter has only two wires. These two wires provide power for the transmitter and are also the signal lines!

A four-wire transmitter has two wires connected to a power supply and two signal wires connected to the PLC. The power supply can be AC or DC depending on the vendor and model.

1) Digital input – 1756-IF8
We will wire a Gems PS41 series pressure switch to Input 3 of a ControlLogix 1756-IB32 digital input module.

The 1756-IB32 module is capable of supporting up to 32 digital input devices. Each additional device would be wired the same as the Gems pressure switch.

2) Analog input – Single-ended and differential
The analog module can be wired in two possible modes: Single-ended or Differential.
The selection is important as it determines how the module is physically wired.

In Single-Ended mode, we can connect 8 two-wire transmitters sharing one power supply. Each transmitter connection is referred to as a Channel.

2) Analog input – 1756-IF8
The 1756-IF8 module is configured for current input during programming in the I/O configuration.
We will connect the Wika E-11 two-wire transmitter to Channel 5 of a ControlLogix 1756-IF8 analog module.

2) Analog input – 1756-IF8 - an industry example
Field wiring diagrams vary between companies. In our example, two channels of the 1756-IF8 are wired in Single-Ended Mode.

We’ll look at how Pressure Transmitter ZT-P3606 is connected to Channel 0, and ZT-P3610 is connected to Channel 1. Both transmitters share the same +24V DC Power Supply.

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#RealPars #Transducer #Industry

[oficinadoeletricista]

Exceptional full scope of the content on the blog about the information about this 2 devices.
Congratulations on your exquisite work.

[АлексейЧернышов-юц]

Thank you for your work, with love from Russia

[guantai]

Great explaination on the difference between the transducer and transmitter.

[amrfathi]

I like your channel... from Egypt ... we need videos for VFD WITH Transmitter

[kilowatts]

Hi! Great video and it explains a lot, thank you. I read the AB manual for the 1756-IF8 card and I'm still learning how to wire these cards. I paused the video at 5:11 to observe the wiring diagram and noticed that RTN, terminal 9 and RTN, terminal 10 are jumpered. Could you use a jumper bar and connect terminals 1, 3, 5, 7, 9, 11, 13, 15, 17 and jump a wire from any terminal that is jumped to RTN on terminal 10? I'm just trying to cut down on individual wire jumpers. Also, one of the flow transmitters I will be using has a 24V DC supply already. for the analog signal. The flow sensor connects directly to the flow transmitter which will give me the 4-20mA signal. Would the (+) connect directly to IN-0 and the (-) directly to i RTN-0. It shows in the manual the wiring for an external power source like in the video at 5:33. The transmitter unit is supplying the 24V DC. I hope I explained that correclty. I'm just trying to get some information on how to wire it correctly. Thanks!

[kevin]

Dear Proff.
Thank you so much for your great video, yet I've a short question please;
you said, in wiring the first transmitter wiring, we will connect the load/signal wire to channel 5 but in the animation the black wire was connected to channel 14, please clarify to us.

I do highly appreciate your effort and time in preparing such informative and detailed videos

[bitebonumbere]

@ 3:11 Please what does it mean when a device is voltage-dependent?

[bitebonumbere]

@ 5:19 Please what is the green lead of the transmitter for ?

[sandeepbarman]

Thanks for video make video of LVDT and encoder wiring

[mohammedsaadali]

what is the difference between the single-ended and the differential?

[joemalotcnj]

Did we forget to mention half of the sensor market that measures in 0-10v in 2 and 3 wire configurations?

[guweizhao]

Transmitter output 4-20ma, PLC module input is 0-20ma, how do you paired signal?