Publication 1794-6.5.12 - September 2011
Specifications 55
Temperature code, North
American
T4A
Enclosure type rating None (open-style)
Wire size Determined by installed terminal base
Signal conductors
Thermocouple
Millivolt
Wire type
Use appropriate shielded thermocouple wire
(2)
Belden 8761
Shielded on signal ports
Wiring category
(1)
2 – on signal ports
3 – on power ports
Terminal screw torque for
cage-clamp terminal base
Determined by installed terminal base
(1)
Refer to the thermocouple manufacturer for proper thermocouple extension.
(2)
Use this category information for planning conductor routing as described in Industrial Automation Wiring and
Grounding Guidelines, Allen-Bradley publication 1770-4.1
.
Environmental Specifications
Attribute Value
Temperature, operating IEC 60068-2-1 (Test Ad, Operating Cold),
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
-20…55 °C (-4…131 °F) (1794-IRT8, 1794-IRT8K)
-20…70 °C (-4…158 °F) (1794-IRT8XT)
Temperature,
non- operating
IEC 60068-2-1 (Test Ab, Unpackaged Non-operating Cold),
IEC 60068-2-2 (Test Bb, Unpackaged Non-operating Dry Heat),
IEC 60068-2-14 (Test Na, Unpackaged Non-operating
Thermal Shock):
-40…85 °C (-40…185 °F)
Relative humidity IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):
5…95% noncondensing
Vibration IEC 60068-2-6 (Test Fc, Operating):
5 g @ 10…500 Hz
Shock
operating
nonoperating
IEC60068-2-27 (Test Ea, Unpackaged shock):
30 g
50 g
Emissions CISPR 11:
Group 1, Class A (with appropriate enclosure)
ESD immunity IEC 61000-4-2:
6 kV contact discharges
8 kV air discharges
General Specifications
Attribute Value
