Instruction Manual

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
3.2328µV
Display Resolution
0.1
o
C, 0.1
o
F; or 1.0µV, 10µV
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