Specifications – Rockwell Automation 1771-IXHR INSTL INSTR HI RES TC/MV INPUT User Manual
Page 11
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