Technical data

Publication 1794-2.1 - January 2000
FLEX I/O and FLEX Integra Product Data
Spring Clamp Temperature Terminal Base Unit Cat. No. 1794-TB3TS 23
Spring Clamp Temperature Terminal Base Unit Cat. No. 1794-TB3TS
Wiring
1794-TB3TS Terminal Base Unit
Channel High Sig (+) Low Sig (-) SigRet Reserved
Shld Ret
1
0 0 1 17(C) 18(N0) 39
1 2 3 19(C) 20(N1) 40
2 4 5 21(C) 22(N2) 41
3 6 7 23(C) 24(N3) 42
4 8 9 25(C) 26(N4) 43
5 10 11 27(C) 28(N5) 44
6 12 13 29(C) 30(N6) 45
7 14 15 31(C) 32(N7) 46
24V dc Common 16, 17, 19, 21, 23, 25, 27, 29, 31, and 33
+24V dc power 34, 35, 50, and 51
Terminals 36-38 and 47-49 are used with cold junction compensators only.
1 Terminals 39-46 are chassis ground.
ATTENTION
!
• Total current draw through the terminal base
unit is limited to 10A. Separate power
connections may be necessary.
• Do not daisy chain power or ground from the
thermocouple terminal base unit to any ac or dc
digital module terminal base unit.
• 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.
40836
1794-TB3TS
The temperature
terminal base has
connections for
cold junction
compensation,
and 8 terminals
designated for
shield termination
to chassis ground.
0-15
16-33
A
B
34 - 51
C
Daisy-chaining
Using Adapter
Power Supply
Note: All modules must be analog or thermocouple modules for this configuration.
42150
24V dc
Wiring when total current draw is less than 10A
Use this method when wiring all analog modules and total current draw
through terminal base units is less than 10A.
thermocouple or
analog module
thermocouple or
analog module
thermocouple or
analog module
thermocouple or
analog module
Specifications - 1794-TB3TS
Number of Terminals 1 row of 16; 2 rows of 18
Terminal Type Spring-clamp - To open, insert bladed screwdriver
(0.120-0.125in/2.54-3.05mm) and lift up.
Current Capacity 10A maximum
Voltage Rating 132V ac maximum
Isolation Voltage Ch-to-ch isolation determined by inserted module
General Specifications
Dimensions (w/mod in base) 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
2
1
Publication
Installation Instructions 1794-5.43
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.”
Daisy-chaining
with a Separate
Power Supply
Note: Use this configuration if using any “noisy” dc discrete I/O modules in
your system.
42151
24V dc
Wiring when total current draw is greater than 10A
Use this method when mixing
digital modules and analog
modules and total current draw
through terminal base units is
greater than 10A.
24V dc,
48V 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.
24V dc
Thermocouple module wiring separate from
discrete wiring
discrete module discrete modulediscrete module
thermocouple or
analog module
I
n
di
v
id
ua
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y
Powered from
Separate Power
Supply
Note: All modules must be analog modules in this configuration.
Total current draw through any base unit must not be greater than 10A
42152
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.
24V dc
thermocouple or
analog module
thermocouple or
analog module
thermocouple or
analog module
thermocouple or
analog module
Combination
Daisychain and
Separate Power
Supply
42149
24V dc
Wiring when total current draw is less than 10A
Use this method when wiring
both digital and analog
modules. Analog modules must
be wired separately from
“noisy” digital modules.
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.
Note: All modules powered by the same power supply must be analog
modules for this configuration.
Class I Division 2 certified
Groups A, B, C, D certified
Class I Zone 2 Group IIC certified