The 1794-TBN Terminal Base Unit by Allen-Bradley is a 16 I/O terminal base point with 250V AC/DC electrical rating and a maximum current capacity of 10A. The module has 2 common terminals, 2 +voltage terminals, and it uses the NEMA style screw clamp for larger gauge wire with a cover for 10 I/O wirings and for I/O termination. The 1794-TBN has 5V DC and 640mA FLEXBUS rating, and it also has a V/COM terminal rating of 250V DC/AC at 50-60 Hz and 10A current. It provides 1.4 Nm (12 lb-in) terminal screw torque and the unit also provided a voltage isolation dependent on the unit module installed in it. It base circuitry utilizes copper wire with a 0.34 x 3.3 mm2 (22-12 AWG) solid or stranded wire size and with a 1.2 mm (3/64 inches thick insulation. The 1794-TBN is designated the T4A (North America) and IEC T4 temperature codes and it comes with an open-style enclosure. It has a rated temperature between -20 and 70 °C (-4 and 158 °F) around an ambient 5-95% non-condensing relative humidity range and is stored at a temperature between -40-85 °C (-40-185 °F). The 1794-TBN’s total dimensions with the module installed are 94mm x 94mm x 69mm (3.7in x 3.7in x 2.7in) and it is CE, CSA, C-TICK, CUL, GOST, KC, MARINE, and UL-certified.