Rockwell Automation 1794-IT8,D17946.5.7 Thermocouple/Millivolt Input Module - Manual (Page 56)

Specifications A–2
Publication 1794-6.5.7 – March 1997
Specifications 1 – 1794-IT8 Thermocouple/mV Input Module
Thermal Dissipation Maximum 10.2 BTU/hr @ 31.2V dc
Keyswitch Position 3
General Specifications
External dc Power
Supply Voltage
Voltage Range
Supply Current
24V dc nominal
19.2 to 31.2V dc (includes 5% ac ripple)
19.2V dc for ambient temperatures less than 55
o C
24V dc for ambient temperatures less than 55 o C
31.2V dc for ambient temperatures less than 40 o C
See derating curve.
150mA @ 24V dc
Cabling Thermocouples inputs
Millivolt inputs Appropriate shielded thermocouple extension wire 3
Belden 8761
Dimensions Inches
(Millimeters) 1.8H x 3.7W x 2.1D
(45.7 x 94.0 x 53.3)
Environmental Conditions
Operational Temperature
Storage Temperature
Relative Humidity
Shock Operating
Non-operating
Vibration
0 to 55 o C (32 to 131 o F) See derating curve.
–40 to 85 o C (–40 to 185 o F)
5 to 95% noncondensing (operating)
5 to 80% noncondensing (nonoperating)
30 g peak acceleration, 11(+1)ms pulse width
50 g peak acceleration, 11(+1)ms pulse width
Tested 5 g @ 10–500Hz per IEC 68-2-6
Agency Certification
(when product or packaging is marked)
•
CSA certified
•
CSA Class I, Division 2
Groups A, B, C, D certified
•
UL listed
•
CE marked for all applicable directives
Installation Instructions Publication 1794-5.21
1 Specifications based on A/D filter first notch frequency of 10Hz .
2 Use 1794-TB2 or -TB3 terminal base unit for millivolt inputs only. You must use a 1794-TB3T terminal base unit when using
thermocouple inputs.
3 Refer to the thermocouple manufacturer for the correct extension wire.