Allen-Bradley C Series User manual

Publication 1771-5.66 – October 1998
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(Catalog Number 1771-IXHR Series C)
Use this document as a guide when installing the 1771-IXHR/C High
Resolution Thermocouple/mV input module.
To See page
Prevent Electrostatic Discharge Below
Understand Compliance to European Union Directives 2
Understand Product Compatibility 2
Calculate Power Requirements 3
Determine Module Placement 3
Key the Backplane Connector 3
Install the Module and Field Wiring Arm 4
Connect Wiring to the Field Wiring Arm 5
Ground the Chassis and Module 6
Configure the Module 7
For this reference information See page
Status Indicators 9
Troubleshooting 9
Specifications 11
The High Resolution Thermocouple/Millivolt input module is
sensitive to electrostatic discharge.
!
ATTENTION: Electrostatic discharge can damage
integrated circuits or semiconductors if you touch
backplane connector pins. Follow these guidelines
when you handle the module:
•Touch a grounded object to discharge static potential
•Wear an approved wrist-strap grounding device
•Do not touch the backplane connector or
connector pins
•Do not touch circuit components inside the module
•If available, use a static-safe work station
•When not in use, keep the module in its
static-shield bag
This icon is used when
additional information is
available in the
High Resolution
Thermocouple/Millivolt Input
Module User Manual
,
publication 1771-6.5.131.
Installation Instructions
Contents
Prevent Electrostatic
Discharge
Allen-Bradley 1771-IXHR

High Resolution Thermocouple/Millivolt Input Module 5
Publication 1771-5.66 – October 1998
Connect your I/O devices to the field wiring arm (cat. no. 1771-WI)
shipped with the module.
!
ATTENTION: Remove power from the 1771 I/O
chassis backplane and field wiring arm before
removing or installing an I/O module.
•Failure to remove power from the backplane or
wiring arm could cause module damage, degradation
of performance, or injury.
•Failure to remove power from the backplane could
cause injury or equipment damage due to possible
unexpected operation.
1
Short circuit
unused pins
Channel 1
Channel 2
18 Input 1 (+ lead)
17 Input 1 (– lead)
16 Input 2 (+ lead)
15 Input 2 (– lead)
14 Input 3 (+ lead)
13 Input 3 (– lead)
12 Input 4 (+ lead)
11 Input 4 (– lead)
10 Not Used
9 Not used
8 Input 5 (+ lead)
7 Input 5 (– lead)
6 Input 6 (+ lead)
5 Input 6 (– lead)
4 Input 7 (+ lead)
3 Input 7 (– lead)
2 Input 8 (+ lead)
1 Input 8 (– lead)
Terminal Identification
Terminal Function
Field Wiring Arm
Cat. No. 1771–WI
18
17
16
1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
10527–I
Connection
Diagram for the High Resolution Thermocouple/mV Input
Module (cat. no. 1771-IXHR/D)
+
–
+
–
Do not use 9 and 10 – reserved for cold junction
compensation within wiring arm.
Short circuit all unused channels by
connecting a jumper wire from the
+ terminal to the – terminal
Connect positive thermocouple leads
to even–numbered terminals, negative
leads to odd–numbered terminals.
Ground cable shield to I/O chassis
mounting bolt.
The sensor cable must be shielded. The shield must:
• extend the length of the cable, but be connected only at the 1771 I/O chassis
• extend up to the point of termination
Important: The shield should extend to the termination point, exposing just enough cable to
adequately terminate the inner conductors. Use heat shrink or another suitable
insulation where the wire exits the cable jacket.
Functional
Ground
Functional
Ground
Connect Wiring to the
Field Wiring Arm

High Resolution Thermocouple/Millivolt Input Module10
Publication 1771-5.66 – October 1998
CSA Hazardous Location Approval Approbation d’utilisation dans des emplacements dangereux par la
CSA
CSA

certifies products for general use as well as for use in hazardous
locations. Actual CSA certification is indicated by the product label
as shown below, and not by statements in any user documentation.
La CSA

certifie les produits d’utilisation générale aussi bien que ceux
qui s’utilisent dans des emplacements dangereux. La certification CSA
en vigueur est indiquée par l’étiquette du produit et non par des
affirmations dans la documentation à l’usage des utilisateurs.
E
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CSA
certi
f
ication
p
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uct label
E
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CSA
To comply with CSA certification for use in hazardous locations, the
following information becomes a part of the product literature for
CSA-certified Allen-Bradley industrial control products.
• This equipment is suitable for use in Class I, Division 2,
Groups A, B, C, D, or non-hazardous locations only .
•
The products having the appropriate CSA markings (that is, Class I Division 2,
Groups A, B, C, D), are certified for use in other equipment where the suitability
of combination (that is, application or use) is determined by the CSA or the local
inspection of fice having jurisdiction.
Pour satisfaire à la certification de la CSA dans des endroits dangereux,
les informations suivantes font partie intégrante de la documentation des
produits industriels de contrôle Allen-Bradley certifiés par la CSA.
• Cet équipement convient à l’utilisation dans des emplacements de Classe 1,
Division 2, Groupes A, B, C, D, ou ne convient qu’à l’utilisation dans des
endroits non dangereux.
• Les produits portant le marquage approprié de la CSA (c’est à dire, Classe 1,
Division 2, Groupes A, B, C, D) sont certifiés à l’utilisation pour d’autres
équipements où la convenance de combinaison (application ou utilisation) est
déterminée par la CSA ou le bureau local d’inspection qualifié.
Important: Due to the modular nature of a PLC

control system, the
product with the highest temperature rating determines the overall
temperature code rating of a PLC control system in a Class I, Division 2
location. The temperature code rating is marked on the product label
as shown.
Important: Par suite de la nature modulaire du système de contrôle
PLC

, le produit ayant le taux le plus élevé de température détermine le
taux d’ensemble du code de température du système de contrôle d’un
PLC dans un emplacement de Classe 1, Division 2. Le taux du code de
température est indiqué sur l’étiquette du produit.
Te
mp
erature co
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g
Look for temperature code
rating here Le taux du code de
température est indiqué ici
Taux
d
u co
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e
d
e te
mpé
rature
The following warnings apply to products having CSA certification for use
in hazardous locations. Les avertissements suivants s’appliquent aux produits ayant la certification CSA pour leur utilisation dans des emplacements
dangereux.
!
ATTENTION: Explosion hazard —
• Substitution of components may impair suitability for Class I,
Division 2.
•
Do not replace components unless power has been switched
of f or the area is known to be non-hazardous.
• Do not disconnect equipment unless power has been switched
of f or the area is known to be non-hazardous.
• Do not disconnect connectors unless power has been switched
of f or the area is known to be non-hazardous. Secure any
user-supplied connectors that mate to external circuits on an
Allen-Bradley product using screws, sliding latches, threaded
connectors, or other means such that any connection can
withstand a 15 Newton (3.4 lb.) separating force applied for a
minimum of one minute.
!
AVERTISSEMENT: Risque d’explosion —
• La substitution de composants peut rendre ce matériel
inacceptable pour lesemplacements de Classe I, Division 2.
• Couper le courant ou s’assurer quel’emplacement est désigné
non dangereux avant de remplacer lescomposants.
• A vant de débrancher l’équipement, couper le courant ou
s’assurer que l’emplacement est désigné non dangereux.
• A vant de débrancher les connecteurs, couper le courant ou
s’assurer que l’emplacement est reconnu non dangereux.
Attacher tous connecteurs fournis par l’utilisateur et reliés aux
circuits externes d’un appareil Allen-Bradley à l ’aide de vis,
loquets coulissants, connecteurs filetés ou autres moyens
permettant aux connexions de résister à une force de
séparation de 15 newtons (3,4 lb. - 1,5 kg) appliquée pendant
au moins une minute.
Le sigle CSA est la marque déposée de l’Association des Standards pour le Canada.
PLC est une marque déposée de Allen-Bradley Company , Inc.
CSA logo is a registered trademark of the Canadian Standards Association
PLC is a registered trademark of Allen-Bradley Company , Inc.
Allen-Bradley 1771-IXHR

High Resolution Thermocouple/Millivolt Input Module 11
Publication 1771-5.66 – October 1998
Description Value
Number of Inputs 8, all of the same type or 4 each of 2 different types
Module Location 1771 I/O chassis – 1 module slot
Type of Input (Selectable) Type B, Pt–30% Rh/Pt–6% Rh (320 to 1800oC)
Type E, chromel/constantan (–270 to 1000oC)
Type J, iron/constantan (–210 to 1200oC)
Type K, chromel/alumel (–270 to 1380oC)
Type R, Pt/Pt–13% Rh (–50 to 1770oC)
Type S, Pt/Pt–10% Rh (–50 to 1770oC)
Type T, copper/constantan (–270 to 400oC)
Millivolt (–100 to +100mV dc)
Thermocouple Linearization IPTS–68 standard, NBS MN–125
Cold Junction Compensation Range: 0 to 60oC
Accuracy: +0.5oC
Temperature Scale (Selectable) oC or oF
Input Resolution 3.2328
µ V
Display Resolution 0.1oC, 0.1oF; or 1.0
µ V, 10 µ V
Isolation Voltage This isolation meets or exceeds the requirements of UL
Standard 508, and CSA Standard C22.2 No. 142.
Common Mode Rejection 120dB at 60Hz, up to 1000V peak
Common Mode Impedance Greater than 10 megohms
Normal Mode Rejection 60dB at 60Hz over +100mV
Input Overvoltage Protection 120V rms, continuous
Open Input Detection Open input produces an overrange in less than 10 seconds
Data Format 2’s complement binary
Calibration Methods Auto – Auto-calibration for offset and gain
Manual – Zero offset and gain adjustment for each channel via
programming terminal
Verify every six months for maintaining absolute accuracy
Processor Compatibility PLC-3 or PLC-5 family processor using the 1771 I/O structure
and block transfer. (Not recommended for use with PLC-2
family processors.)
Backplane Power Consumption 850mA @ 5V
Power Dissipation 4.25 Watts maximum
Thermal Dissipation 14.5 BTU/hr
Environmental Conditions
Operating Temperature:
Rate of Change:
Storage Temperature:
Relative Humidity:
0 to 60oC (32 to 140oF)
Ambient changes greater than 0.5oC per minute may
temporarily degrade performance during periods of change
–40 to 85oC (–40 to 185oF)
5 to 95% (without condensation)
Keying Between 20 and 22
Between 24 and 26
Specifications continued on next page
Specifications