0-10V RTD Transmitter

[drummerguy]

Hello,
I am looking for some help on how to wire up a transmitter I recently purchased. Here is a link to the transmitter i bought

http://www.ebay.com/itm/121841042199?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

and here is a link to the rtd if am trying to use.

http://www.ebay.com/itm/251572167399?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT

I am trying to connect this to an analog input on a micrologix 1400 and I am not sure where to connect the micrologix to the transmitter. the transmitter and plc input are both 0-10.
Thanks!

 

[ASF]

Welcome to the forum!

I for one am confused. You need three terminals to connect an RTD, and then for a voltage output I would have though you'd need at least three more (positive supply, 0-10V positive signal, and common). You only have 5 terminals! I'd suggest it's more likely a 4-20mA device, which can operate as a two-wire loop powered device.

Can you get a manual for it?

In any case, if you can somehow get 0-10V out of it, connect the positive to IV0(+) on your MicroLogix, and the negative to COM ANA. If it is a two wire 4-20mA loop powered device, connect 24VDC to the positive of the transmitter, connect the negative of the transmitter to IV0(+) on your Micrologix, and connect 0VDC to COM ANA. Then connect a 500 ohm resistor between IV0(+) and ANA COM, which will convert your 4-20mA into 2-10V.

Hope that helps!

 

[shooter]

The output of the transmitter is the one called Vout(this one will have 0-10Volts.
you will need a power source of 24 Volts.
on the 2 connections +and -
and the sensor only connect 2 wires red and blue to the terminals next to the Vout.
on the PLC make a connection from Vout to the input of the card and a wire from the 0 Volt power supply to the gnd of the card.

 

[JaxGTO]

You have a 3 wire RTD and a 2 wire converter puck. Although this can work, don't expect it to be very accurate if you cabling is more the a few feet. The third wire on the RTD is meant to be used to nullify the length of the wire from the RTD to the converter.

 

[shooter]

jax you are correct, however it is chinese ebay with >5% accuracy so no worries on the wire. oke it costs <10 $ so what to expect.

and if it is working i think that would be next question.

 

[amberman]

Connect 24V DC to the + terminal
Connect the - terminal to ML1400 analogue input e.g. IV0(+)
Connect ML1400 COMANA to the 0V common of your 24Vdc supply.

It says it's a three wire Pt100 transmitter and you have a three wire PT100 device so in theory it should be fine but the wiring diagram on the transmitter doesn't actually show a Pt100... Probably just the wrong picture and the real item will be correct (hopefully).