FLEX I/O Terminal Base Units
3
Publication 1794-IN092E-EN-P - November 2009
Mount the Terminal Base Unit on a DIN Rail
1.
Remove the cover plug (if used) in the male connector of the unit to which
you are connecting this terminal base unit.
2.
Check to make sure 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.
Make certain the female connector
(B) is fully retracted.
4.
Position the terminal base unit on the 35 x 7.5 DIN rail (A) (A-B pt no.
199-DR1).
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 connector.
6.
Refer to the installation instructions for specific wiring information for the
module you are installing in this terminal base.
7.
Repeat the above steps to install the next terminal base.
Wire Connections for the Terminal Base Units
ATTENTION
During mounting of all devices, be sure that all debris (such as metal chips or
wire strands) is kept from falling into the module. Debris that falls into the
module could cause damage upon application of power.
ATTENTION
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.
A
B
A
C
DIN Rail
Position the terminal base at a slight angle and hook it over the top of the DIN rail.
C
Make sure the hook (C) on the terminal base slides under the edge of the adapter and the
flexbus connector is fully retracted. Slide the terminal base over, tight against the adapter.
Press down on the terminal base to lock it on the DIN rail. If the terminal base does not lock
into place, use a screwdriver or similar device to open the locking tab, press down on the
base, and release the locking lever to lock the base in place.
ATTENTION
When using FLEX I/O modules in a high-vibration installation, especially when
mounting the DIN rail vertically, use DIN-rail locks (A-B part number
1492-EA35) to prevent accidental separation of the terminal block units.
Gently push the flexbus connector into the side of the side of the adapter to
complete the backplane connection.
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
34
Wiring Connections for the 1794-TB32, 1794-TB32S
NC
+V2 = Terminals 43, 45, 47, 49
Inputs/Outputs
Inputs/Outputs
+V1 COM1 +V1 COM1 +V1 COM1 +V1 COM1 +V2 COM2 +V2 COM2 +V2 COM2 +V2 COM2
NC
+V1 = Terminals 35, 37, 39, 41
COM1 = Terminals 36, 38, 40, 42
NC = No connections (terminals 16, 33, 34, 51)
COM2 = Terminals 44, 46, 48, 50
NC
NC
(1794-TB32 shown)
A
B
C
Wiring Connections for the 1794-TB32, -TB32S
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
34
Inputs
Commons
(1794-TB3 shown)
-V (Common) = Terminals B-16 and B-33
+V (Voltage In) = Terminals C-34 and C-51
-V
Voltage
In +V
Voltage
Out +V
Voltage
Terminals 35 to 50 not available on 1794-TB2
A
B
C
Common
-V
Common
Wiring Connections for the 1794-TB2, 1794-TB3, 1794-TB3K, 1794-TB3S
For daisy-chaining: Supply in - C-34 (+) and B-16 (-)
Supply out - C-51 (+) and B-33 (-)
Wiring Connections for the 1794-TB2, -TB3, -TB3K, -TB3S, TB3SK
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
34
Wiring Connections for the 1794-TB3G, 1794-TB3GK, 1794-TB3GS
Inputs/Outputs
Inputs/Outputs
Chassis
Ground
(1794-TB3G shown)
Chassis
Ground
+V COM
24V dc
Supply In
+V
COM
24V dc
Supply Out
Chassis Grounds for Shields
Chassis
Ground
Chassis
Ground
I/O
I/O
+24V dc = Terminals C-34, C-50
COM = C-35, C-51
Chassis Ground = Terminals B-16, B-33, C-38, C-40 through 45, C-47
A
B
C
For daisy-chaining: Supply in - C-34 (+), C-35 (-)
Supply out - C-50 (+), C-51 (-)
NC = No connection
NC
NC
Wiring Connections for the 1794-TB3G, -TB3GK, -TB3GS, -TB3GSK
