Technical data

Publication 1794-2.1 - January 2000
FLEX I/O and FLEX Integra Product Data
3-Wire Spring Clamp Terminal Base Unit Cat. No. 1794-TB3S 21
3-Wire Spring Clamp Terminal Base Unit Cat. No. 1794-TB3S
1794-TB3S Terminal Base Unit
A - 0 through 15 Input/Output
B - 16 through 33 24V dc Common, 120V ac Common, or 48V dc Common
C - 34 through 51 +24V dc Power, 120V ac, or 48V dc
ATTENTION
!
• 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.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
0-15
16-33
34-51
A
B
C
40091
1794-TB3S
Daisy-chaining
Using Adapter
Power Supply
40093
24V dc
Wiring when total current draw is less than 10A
Use this method when wiring all digital modules and total current
draw through terminal base units is less than 10A.
Daisy-chaining
with a Separate
Power Supply
42149
24V dc
Wiring when total current draw is less than 10A
Use this method when wiring all ac digital modules and total current
draw through terminal base units is less than 10A.
24V dc or
120V ac
Separate power supply can be brought in on last module in chain
if necessary. Make sure you do not jumper to adapter if using
this method.
Specifications - 1794-TB3S
Number of Terminals 1 row of 16
2 rows of 18
Terminal Type Spring-clamp - To open, insert bladed
screwdriver (0.100-0.120in/2.54-3.05mm) and lift
up.
Current Capacity 10A maximum
Voltage Rating 132V ac maximum
Isolation Voltage Channel-to-channel isolation determined by
inserted module (see publication 1794-5.2)
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 1794-5.42
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.”
Individually
Powered from
Separate
Power Supply
Note: Use this configuration if using any
“noisy” dc digital I/O modules in your system.
Thermocouple Module wiring is separate from digital wiring.
Wiring when total current draw is greater than 10A
40094
24V dc
24V dc or
48V dc
24V dc,
120V ac, or
48V dc
Separate power supply can be brought in on last module in chain
if necessary. Make sure you do not jumper to adapter if using
this method.
C
ombination
Daisychain
and Separate
Power Supply
Note: All modules powered by the same power supply must be
analog modules for this configuration.
Total current draw through any base unit must not be greater than 10A
40095
24V dc
24V dc
Separate power supply can be brought in on last module in chain
if necessary. Make sure you do not jumper to adapter if using
this method.
Use this method when wiring
both digital and analog modules.
Analog modules must be wired
separately from “noisy” digital
modules.
Class I Division 2 certified
Groups A, B, C, D certified
Class I Zone 2 Group IIC certified