Omega Engineering TX801M User Manual

An OMEGA Technologies Company

User's Guide

http://www.omega.com
e-mail: [e-mail]

TX801M SERIES
PROGRAMMABLE ISOLA TING
MA TH FUNCTION TRANSMITTER

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA...Of Course!

TEMPERATURE

Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies
Wire: Thermocouple, RTD & Thermistor
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Industrial pH & Conductivity Equipment

DATA ACQUISITION

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ENVIRONMENTAL
MONITORING AND CONTROL

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pH, Conductivity & Dissolved Oxygen Instruments

M-3796-0302

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OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA Warranty adds an additional one (1) month grace
period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that
OMEGA’s customers receive maximum coverage on each product.

If the unit should malfunction, it must be returned to the factory for evaluation. OMEGA’ s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon
examination by OMEGA, if the unit is found to be defective it will be repaired or replaced at no charge.
OMEGA’s W ARRANTY does not apply to defects resulting from any action of the purchaser , including but
not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unau­thorized modification. This W ARRANTY is VOID if the unit shows evidence of having been tampered with
or shows evidence of being damaged as a result of excessive corrosion; or current, heat, moisture or vibra­tion; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’ s con­trol. Components which wear are not warranted, including but not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA
neither assumes responsibility for any omissions or errors nor assumes liability for any damages
that result from the use of its products in accordance with information provided by OMEGA,
either verbal or written. OMEGA warrants only that the parts manufactured by it will be as
specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESEN­TATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DIS­CLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are
exclusive and the total liability of OMEGA with respect to this order, whether
based on contract, warranty, negliegence, indemnification, strict liability or otherwise, shall not
exceed the purchase price of the component upon which liability is based. In no event shall OMEGA
be liable for consequential, incidental or special damages.

WARRANTY/DISCLAIMER

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our
basic WARRANTY/DISCLAIMER language, and additionally , purchaser will indemnify OMEGA and hold
OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in such a
manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED
RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER
TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of
the return package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent break­age in transit.

FOR WARRANTY RETURNS, please have the
following information available BEFORE contact­ing OMEGA:

1. P.O. number under which the product was PUR
CHASED,

2. Model and serial number of the product under
warranty, and

3. Repair instructions and/or specific problems
relative to the product.

FOR

NON-WARRANTY REPAIRS, consult

OMEGA for current repair charges. Have the
following information available BEFORE con
tacting OMEGA:

1. P.O. number to cover the COST of the repair,

2. Model and serial number of product, and

3. Repair instructions and/or specific problems
relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers
the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.

 Copyright 1996 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced,

translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without prior written consent of
OMEGA ENGINEERING, INC.

omega.com

TM

OMEGA

OMEGAnet

SM

On-Line Service

http://www.omega.com

Internet e-mail

[e-mail]

Servicing Nor th America:

USA: One Omega Drive, Box 4047
ISO 9001 Certified Stamford, CT 06907-0047

Tel: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1
Tel: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

SM

Customer Service: 1-800-622-2378 / 1-800-622-BEST

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Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

SM

TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico and
Latin America: Tel: (95) 800-TC-OMEGASMFAX: (95) 203-359-7807

En Espanol: [phone] e-mail: [e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

Tel: [phone] FAX: [phone]
Toll Free in Benelux: 06 0993344
e-mail: [e-mail]

Czech Republic: ul. Rude armady 1868, 733 01 Karvina-Hranice, Czech Republic

Tel: [phone] FAX: [phone]
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France: 9, rue Denis Papin, 78190 Trappes

Tel: [phone] FAX: [phone]
Toll Free in France: 0800-4-06342
e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

Tel: [phone] FAX: [phone]
Toll Free in Germany: 0130 11 21 66
e-mail: [e-mail]

United Kingdom: 25 Swannington Road, P.O. Box 7, Omega Drive,
ISO 9001 Certified Broughton Astley, Leicestershire, Irlam, Manchester,

LE9 6TU, England M44 5EX, England
Tel: [phone] Tel: [phone]
FAX: [phone] FAX: [phone]

Toll Free in England: 0800-488-488

e-mail: [e-mail]

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly
pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate
device upon certification.

The information contained in this document is believed to be correct but OMEGA Engineering, Inc. accepts no liability for any errors it
contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, patient connected applications.

Features.

l Field Programmable Input and Output Ranges.
l 29 Predefined Math Functions.
l 12 Bit Resolution. (0.025%)
l Input to Output Isolation 1.6kV.
l High Accuracy 0.1%.
l Universal AC/DC Power Supply.
l Compact DIN Rail Mount Enclosure.
l 120 Point User Definable Curve Fitting.

TX801M Programmable Isolating
Maths Function Transmitter.

Programmable Isolating Maths

Function Input to DC Current or

DC Voltage Output Transmitter.

TX801M Specifications.

Input -Voltage Field Programmable 0~5Vdc / 0~10Vdc / 1~5Vdc / 2~10Vdc.

Minimum Input Resistance = 180kΩ.
Maximum Over-range = 24Vdc Continuous.

-Current Field Programmable 0~20mAdc / 4~20mAdc.

Input Resistance = 250Ω.
Maximum Over-range = 50mAdc Continuous.

-Maths Functions 29 Field Selectable, Predefined, Maths Functions.
RS-232 Interface for Calibration and Testing. (Using a PI-RAC.)

-User Defined Curve Up to 120 Point Look-up Table, Linear Interpolation Between Points.
RS-232 Interface for Programming of User Curves. (Using a PI-RAC.)

IMPORTANT: The RS-232 communications port is NOT ISOLATED from the TX801M inputs.

Universal P/S -Standard High (H) 70~270Vac and 80~380Vdc; 50/60Hz; 4VA.

-Standard Mid (M) 24~80Vac and 20~90Vdc; 50/60Hz; 4VA.

-Low Voltage (L) 8~30Vac and 8~30Vdc; 50/60Hz; 4VA.

-Circuit Sensitivity <±0.001%/V FSO Typical.

Resolution -Input 12 Bit.

-Output 12 Bit.

Accurate to <±0.1% FSO Typical.
Linearity & Repeatability <±0.1% FSO Typical.
Ambient Drift <±0.01%/C FSO Typical.
Noise Immunity 125dB CMRR Average. (1.6kV Peak Limit.)
R.F. Immunity <1% Effect FSO Typical.
Isolation Voltage 1.6kVac/dc Peak Input to Output for 60sec.
Response Time 200msec Typical. (10 to 90% 100msec Typical.)

Note. The %RH Function has Software Dampening of 2sec Typical.

Operating Temperature 0~70C.
Storage Temperature -20~80C.
Operating Humidity 90%RH Max. Non-Condensing.
Construction Socket Plug-In Type With Barrier Terminals.
Relative Humidity -Input 0~100C for Input Range.
(Function 29) -Range 0~100%RH Over 0~100C Input.

-Accurate to <±1% FSO Typical.

Note 1. Refer to IN-HWD Humidity and Temperature Converter for Wet and Dry Bulb installation guide.
Note 2. Specifications based on Standard Calibration Unit, unless otherwise specified.
Note 3. Due to ongoing research and development, designs, specifications, and documentation are subject to change without notification.

No liability will be accepted for errors, omissions or amendments to this specification.

Quality Assurance Programme.

The modern technology and strict procedures of the ISO9001 Quality Assurance Programme applied
during design, development, production and final inspection grant long term reliability of the instrument.

The Proper Installation & Maintenance of TX801M.

MOUNTING.

(1) Mount in a clean environment in an electrical cabinet on 35mm, symetrical, mouning rail.
(2) Do not subject to vibration or excess temperature or humidity variations.
(3) Avoid mounting in cabinets with power control equipment.
(4) To maintain compliance with the EMC Directives the TX801M is to be mounted in a fully enclosed steel cabinet. The cabinet

must be properly earthed, with appropriate input / output entry points and cabling.

WIRING.

(1) A readily accessible disconnect device and overcurrent device must be incorporated in the the power supply wiring.
(2) All cables should be good quality overall screened INSTRUMENTATION CABLE with the screen earthed at one end only.
(3) Signal Cables should be laid a minimum distance of 300mm from any power cables.
(4) For 2 wire current loops and 2 wire voltage signals or 2 wire current signals, Austral Standard Cables B5102ES is

recommended. For 3 wire transmitters Austral Standard Cables B5103ES is recommended.
(5) It is recommended that you do not ground current loops and use power supplies with ungrounded outputs.
(6) Lightning arrestors should be used when there is a danger from this source.
(7) Refer to diagrams for connection information.

COMMISSIONING.

(1) Once all the above conditions have been carried out and the wiring checked apply power to the PI-M and allow five minutes

for it to stabilize.
(2) Take a low (approx 10%) and high (approx 90%) reading of the variable being measured by the transducer supplying

the signal to the PI-M, and ensure that this agrees with the level being indicated by the PLC or indicator, etc, that the TX801M

is connected into. Adjust for any difference using the Zero and Span trimpots in the top of the PI-M enclosure with a small

screwdriver until the two levels agree. (Clockwise to increase the output reading and anti-clockwise to decrease the output

reading.)

MAINTENANCE.

(1) Repeat (2) of Commissioning.
(2) Do it regularly - at least once every 12 months.

Dimensions and Mounting.

2 1 8 7

3 4 5 6

40mm
50mm

80mm

8.4mm

2 x 4.5mm

8PFA Octal Termination Base

80mm

Side View

120mm

Top View

51mm

84mm

80mm

100mm

Top View

58mm

Minimum distance

between units.

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1 2 3 4 5 6 1 2 3 4 1 2 3 4 5 6 1 2 3 4

Vm005~0

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V1~0 1 0 1 1 1 1 0 0 1 1 Am2~0 1 0 1 1 1 1 0 0 0 0
V2~0

110111 0011 Am5~0 0101110000
V3~0 1 0 0 1 1 1 0 0 1 1 Am01~0 1 0 1 0 1 1 0 0 0 0
V4~0

111011 0011 Am61~0 111101 0000
V5~0 1 0 1 0 1 1 0 0 1 1 Am02~0 1 1 0 1 0 1 0 0 0 0
V6~0

110011 0011 Am5~1 110111 1000
V8~0 1 1 1 1 0 1 0 0 1 1 Am01~2 1 1 1 0 1 1 1 0 0 0

V01~0

110101 0011 Am02~4 111101 1000

V21~0 1 1 1 0 0 1 0 0 1 1 Am1~1- 1 0 1 1 1 1 0 1 0 0

V5~1

111011 1011 Am2~2- 110111 0100

V01~2 1 1 1 1 0 1 1 0 1 1 Am5~5- 1 0 1 0 1 1 0 1 0 0

V1~1-

110111 0111 Am01~01- 110101 0100

V2~2- 1 1 1 0 1 1 0 1 1 1 Am02~02- 1 1 1 0 1 0 0 1 0 0
V5~5-

110101 0111 *Am01-~0 10 1011 0000

V01~01- 1 1 1 0 1 0 0 1 1 1 *Am02-~0 1 1 0 1 0 1 0 0 0 0
V21~21-

111100 0111

*V5-~0 1 0 1 0 1 1 0 0 1 1

*V01-~0 110101 0011

Output Range Programming Table.

Notes: 1/ Switch status 1 = ON 0 = OFF

2/ Output ranges with '*' beside them reverse the polarity of the output connections.

3

4

5

6

Terminations.

Output 1 +Ve

2 -Ve

Input 3 Xin

4 Yin
5 Zin
6 COM

P/S 7 ~AC/+DC

8 ~AC/-DC

Examples of Input Connection.

Xin

Yin

Zin

COM

Transducer With Current

− −

− −

− or Voltage Output. +

Transducer With Current

− or Voltage Output. +

Transducer With Current

− −

− −

− or Voltage Output. +

2

1

8

7

-

+

-

+

~

~

Power

Supply

Output

Input

1600V Isolation

AC/DC Power

Source.

­+

Eg. Indicator, 2100-M,

etc. With Voltage or

Current Input.

~
~

­+

ON
1
2
3
4
5
6

S1-Span

ON
1
2
3
4

S2-Function

OFF ON
Gain = 1 Gain = 0
Gain = 2 Gain = 0
Gain = 4 Gain = 0
Gain = 8 Gain = 0
Gain =16 Gain = 0
Gain =32 Gain = 0

25 Turn Trimpot
for Span ±10%

OFF ON
0% Offset +20% Offset
0% Offset -50% Offset
Current O/P Voltage O/P
Current O/P Voltage O/P

Zero

25 Turn Trimpot
for Zero ±10%

Plan View of TX801M Adjustments. TX801M H1 Power Supply Link Settings.

OUTPUT PROGRAMMING INPUT PROGRAMMING

Span

S3-Maths

S4-Input

S

Z

6
5
4
3
2
1

ON

6
5
4
3
2
1

ON

Refer to

'MATHS FUNCTION

PROGRAMMING TABLE'

for Dip Switch Settings

OFF ON

}20% Offset }No Offset.

1/2 Scale in Full Scale in
Zin=VoltageZin=Current
Yin=VoltageYin=Current
Xin=VoltageXin=Current

COMMS

RESET

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M cdV09~02/caV08~42:diMrofkniL

WARNING: High Voltages Maybe Present.

Only adjust link with power disconnected.

Notes:
1/ H1 is approx 4cm (1½") behind the 'S' trimpot.
2/ Exceeding voltage ranges may damage the unit.
3/ Ensure the enclosure label is correctly labelled for the
link position.
4/ Adjust H1 jumper with a pair of needle nose pliers.
5/ Low Voltage Power Supply version is fixed, and has no
link. This must be ordered separately.

S2-FUN C TS1-SPA N S Z

H

M

H1

H

M

MID HIGH

Note: Power supply H is field selectable for M, and M for H. Power supply L must be ordered separately.

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cdV03~8dnacaV03~8:ylppuSrewoPegatloVwoL L

How to Use the Maths Function Formulae.

X, Y, and Z are taken as 0 to 1.0000, representing the full input range.
eg. 4.000mA = 0.0000

8.000mA = 0.2500

12.000mA = 0.5000

16.000mA = 0.7500

20.000mA = 1.0000

The selected calculation is then performed on the inputs. The output is then SCALED so the resultant range is between
0 and 1.000. (The scaling factor is the factor the largest output must be scaled by to get the result = 1.) This 0 to 1.000
range represents the full output range, as set by the output DIP switches.

Examples of Using the Maths Function Formulae.

NOTE: For these examples inputs and outputs are configured as 4~20mA.

TX801MInput Range Programming Table.

Always set OUTPUT range first, then INPUT range.
DIP switches and trimpots are accessed by removing the small rectangular lid on the top of the TX801M enclosure.

Notes: 1/ Switch status 1 = ON, 0 = OFF, X = DON'T CARE.

2/ All inputs must be of the same signal type.
3/ If using voltage inputs, short unused inputs to 'COM' (terminal 6).

EGNARTUPNI 1-4S 2-4S 3-4S 4-4S 5-4S 6-4S

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V5~0

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V01~0 0 0 0 1 1 1

V5~1

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X Y Z X Y Z

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0202- 0.10.1- 200.02

ZxYxX

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1

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61 61 61 57.0 57.0 57.0 9124.0 57.01
02 02 02 0.1 0.1 0.1 1 00.02

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4-- 0.0-- 0

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8-- 52.0-- 5.000.21

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61-- 57.0-- 0668.068.71
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X

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21 - - 5.0 - - 52.0 00.8
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02 - - 0.1 - - 1 00.02