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Specifications – Rockwell Automation 1771-IXHR INSTL INSTR HI RES TC/MV INPUT User Manual

Page 11

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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 1800

o

C)

Type E, chromel/constantan

(–270 to 1000

o

C)

Type J, iron/constantan

(–210 to 1200

o

C)

Type K, chromel/alumel

(–270 to 1380

o

C)

Type R, Pt/Pt–13% Rh

(–50 to 1770

o

C)

Type S, Pt/Pt–10% Rh

(–50 to 1770

o

C)

Type T, copper/constantan

(–270 to 400

o

C)

Millivolt

(–100 to +100mV dc)

Thermocouple Linearization

IPTS–68 standard, NBS MN–125

Cold Junction Compensation

Range: 0 to 60

o

C

Accuracy: +0.5

o

C

Temperature Scale (Selectable)

o

C or

o

F

Input Resolution

3.2328

µ

V

Display Resolution

0.1

o

C, 0.1

o

F; 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 60

o

C (32 to 140

o

F)

Ambient changes greater than 0.5

o

C per minute may

temporarily degrade performance during periods of change
–40 to 85

o

C (–40 to 185

o

F)

5 to 95% (without condensation)

Keying

Between 20 and 22
Between 24 and 26

Specifications continued on next page

Specifications