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FLEX Ex Spring Clamp Terminal Base
(Cat. No. 1797-TB3S)
1
5
6
7
8
9
1
Female flexbus connector
2
Terminal base unit
3
Male flexbus connector
4
Keyswitch - Set to the position required for the installed module
5
Mounting holes for panel mounting
6, 7, 8 Input/output terminal strips for connecting input/output wiring, -V,
+V connections, chassis grounds
9
Locking tab
10
Module locking latch
11
Cover plug for male flexbus connector
12
96 pin female I/O connector
You will need to rotate the keyswitch (4) to the correct position depending
on the module. Refer to the module's installation instructions for more
information. Do not change the position of the keyswitch after wiring
the terminal base unit.
FLEX Ex is a trademark of Rockwell Automation.
Installation Instructions
11
10
4
3
12
2
Component Identification
Only remove this cover plug if
connecting another terminal
base unit.
41253
1797-5.2 - September 1999
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Related Manuals for Allen-Bradley 1797-TB3S
Summary of Contents for Allen-Bradley 1797-TB3S
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Page 1: Installation Instructions
Installation Instructions FLEX Ex Spring Clamp Terminal Base (Cat. No. 1797-TB3S) Only remove this cover plug if connecting another terminal base unit. 41253 Component Identification Female flexbus connector Terminal base unit Male flexbus connector Keyswitch - Set to the position required for the installed module... -
Page 2: Installation In Zone
FLEX Ex Spring Clamp Terminal Base Make certain that you only connect terminal base units to other intrinsically safe system modules or adapters to maintain the integrity of the intrinsically-safe backplane. 41307 Installation in Zone 1 This terminal base unit must not be exposed to the environment. Provide a suitable metal enclosure. - Page 3 Description The 1797-TB3S terminal base has 36 wiring connections to/from a plug-in module. The use of each terminal depends on the module mounted in this base. The 1797-TB3S terminal base also has connections for cold junction compensation and terminals designated for shield termination to chassis ground.
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Page 4: Mounting On A Din Rail
FLEX Ex Spring Clamp Terminal Base Wiring Connections for Terminal Base 1797-TB3S Row A Row B 45 46 Row C Label placed at top of wiring area Row A Row B Row C +V -V 41254 No connections allowed to terminals 36 and 49 To connect wiring, insert a blade-type screwdriver with a blade width of 0.100-0.120in. - Page 5 FLEX Ex Spring Clamp Terminal Base 2. Check to make sure that the 16 pins in the male connector on the adjacent device are straight and in line so that the mating female connector on this terminal base unit will mate correctly. 3.
- Page 6 FLEX Ex Spring Clamp Terminal Base 5. Rotate the terminal base onto the DIN rail with the top of the rail hooked under the lip on the rear of the terminal base. Use caution to make sure that the female flexbus connector does not strike any of the pins in the mating male connector.
- Page 7 FLEX Ex Spring Clamp Terminal Base Daisy-chaining You can use the daisy chain configuration if the total module power draw is <8.5W. +V, -V Otherwise, power is Wiring when total module current power is less than 8.5W 41110 connected to individual modules.
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Page 8: Mounting Dimensions
FLEX Ex Spring Clamp Terminal Base Mounting Dimensions (94) (94) Inches (Millimeters) (69) 41342 Repair This terminal base unit is not field-repairable. Any attempt to open this terminal base unit will void the warranty and IS certification. If repair is necessary, return this module to the manufacturer. - Page 9 FLEX Ex Spring Clamp Terminal Base 1797-TB3S Specifications 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. Terminals Assignments Only for intrinsically safe circuits +34, -35, +50, -51, and 96 <10V dc...
- Page 10 FLEX Ex Spring Clamp Terminal Base 1797-5.2 - September 1999...
- Page 11 FLEX Ex Spring Clamp Terminal Base Important: For detailed certification information, refer to the FLEX Ex System Certification Reference Manual, publication 1797-6.5.6. Attention: Avoid electrostatic charge. 1797-5.2 - September 1999...
- Page 12 Publication 1797-5.2 - September 1999 PN 957208-15 Supersedes Publication 1797-5.2 - September 1998 © 1999 Rockwell International.All Rights Reserved.Printed in USA...
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