Technical data

Publication 1794-2.1 - January 2000
FLEX I/O and FLEX Integra Product Data
Fused Terminal Base Unit Cat. No. 1794-TBNF 27
Fused Terminal Base Unit Cat. No. 1794-TBNF
Wiring
ATTENTION
!
• Total current draw through the terminal base unit
is limited to 10A. Separate power connections may
be necessary.
• Make certain that the hook on the terminal base
you are installing is properly hooked into the
adjacent terminal base adapter. Failure to lock the
hook into the adjacent base/adapter can result in
loss of communication on the backplane.
• Do not force the terminal base into the adjacent
base/adapter. Forcing the units together can bend
or break the hook and allow the units to separate
and break communication over the backplane.
• On the 1794-TBNF, only even-numbered terminals
0 through 14 (row B) are fused.
1794-TBNF
40098
Shown with
fuse cover in
the “closed”
position
16 0 2 4 6 8 10 12 14 33
34 1 3 5 7 9 11 13 15 51
1794-TBNF
16
34
33
51
Even Numbered Terminals 0 thru 14
Odd Numbered Terminals 1 thru 15
16, 0, 2, 4, 6,
8, 10, 12, 14, 33
34, 1, 3, 5, 7,
9, 11, 13, 15, 51
B
C
40097
Specifications - 1794-TBNF
Number of Terminals 2 rows of 10 terminals with cover
Terminal Screw Torque 7-9 inch-pounds
Current Capacity 10A maximum
Voltage Rating 264V ac maximum
Isolation Voltage Tested at 2500V dc for 1s between user
terminals and logic side circuitry
Channel-to-channel isolation determined by
inserted module.
Fusing 8 - 5x20mm fuses (1 for each even-numbered
terminal - 0 through 14 on row B)
Shipped with 1.6A, 250V ac Slow Blow fuses
suitable for 1794-OA8 ac output module.
Refer to individual installation instructions for
fusing recommendations for other modules.
Littelfuse PN23901.6, A-B PN94171304,
SAN-O PNSD6-1.6A
General Specifications
Dimensions (with module
installed in base) HxWxD
94mm x 94mm x 69mm (3.7in x 3.7in x 2.7in)
Environmental Conditions
Operational Temperature
Storage Temperature
Relative Humidity
Shock Operating
Non-operating
Vibration
0 to 55
o
C (32 to 131
o
F)
-40 to 85
o
C (-40 to 185
o
F)
5 to 95% noncondensing
30g peak acceleration, 11(±1)ms pulse width
50g peak acceleration, 11(±1)ms pulse width
Tested 5g @ 10-500Hz per IEC 68-2-6
Conductors Wire Size
Category
12 gauge (4mm
2
) stranded maximum
22 gauge (0.35mm
2
) minimum
3/64 inch (1.2mm) insulation maximum
(Established by inserted module.)
1
Publication
Installation Instructions 1794-5.17
Agency Certification
1 Use this conductor category information for planning conductor routing. Refer to
publication 1770-4.1, “Industrial Automation Wiring and Grounding Guidelines for Noise
Immunity.”