Technical data

Publication 1794-2.1 - January 2000
FLEX I/O and FLEX Integra Product Data
Spring Clamp Grounded Terminal Base Unit Cat. No.1794-TB3GS 25
Spring Clamp Grounded Terminal Base Unit Cat. No.1794-TB3GS
Wiring
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-TB3GS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
18 19 20 21 22 23 3324 25 26 27 28 29 30 31 3217
35 36 37 38 47 48 49 5034
51
16
39 40 41 42 43 44 45 46
Chassis
Gnd
Chassis
Gnd
+V COM
24V dc
Supply In
Chassis Ground
for Shields
40592
+V COM
24V dc
Supply Out
Label placed at top of wiring area.
Row A
Row B
Row C
Daisy-chaining
Using Adapter
Power Supply
Note: All modules must be analog modules for this configuration.
42153
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-TB3GS
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 31.2V dc maximum
Isolation Voltage Ch-to-ch isolation determined by inserted module
General Specifications
Dimensions (w/module 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
Category is dependent upon installed module.
1
Publication
Installation Instructions 1794-5.59
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: All modules powered by the same power supply must be analog
modules for this configuration.
42154
24V dc
Wiring when total current draw is greater than 10A
Use this method when wiring
all analog modules and total
current draw through terminal
base units is greater than 10A.
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
I
n
di
v
id
ua
ll
y
Powered from
Separate Power
Supply
Wiring when total current draw is greater than 10A
42155
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
24V dc
C
om
bi
nat
i
on
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
42156
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 to balance
current draw if necessary.
thermocouple or
analog module
thermocouple or
analog module
thermocouple or
analog module
thermocouple or
analog module
Class I Division 2 certified
Groups A, B, C, D certified
Class I Zone 2 Group IIC certified