
3
Publication 1794-IN129B-EN-P - April 2009
7. 1794-TB2, -TB3, and -TB3S - Connect wiring shields to functional
earth ground as near as possible to the module.
1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T and 1794-TB3TS Terminal Base
Wiring
1794-TBN Terminal Base Wiring
Input Map (1794-IF4IXT)
Input Map (1794-OF4IXT, 1794-IF2XOF2XT)
Output Map (1794-IF4IXT)
Output Map (1794-OF4IXT)
-V DC
Common
1794-TB2, -TB3, -TB3S - Terminals B-16 through B-33 are internally
connected in the terminal base unit.
1794-TBN - Terminals B-16 and B-33 are internally connected in the
terminal base unit.
1794-TB3T, -TB3TS - Terminals 16, 17, 19, 21, 23, 25, 27, 29, 31 and 33 are
internally connected in the terminal base unit.
+V DC
Power
1794-TB3, -TB3S - Terminals 34 through 51 are internally connected in the
terminal base unit.
1794-TB3T, -TB3TS - Terminals 34, 35, 50 and 51 are internally connected
in the terminal base unit.
1794-TBN, -TB2 - Terminals 34 and 51 are internally connected in the
terminal base unit.
Chassis
Ground
(Shield)
1794-TB3T, -TB3TS - Terminals 39 through 46 are internally connected to
chassis ground.
Dec. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
Word 0 Analog Value Channel 0
Word 1 Analog Value Channel 1
Word 2 Analog Value Channel 2
Word 3 Analog Value Channel 3
Word 4 Real Time Sample
Word 5 PU FP CF 0 Reserved 0 0 0 0 0 BD DN 0
Word 6 0 0 0 0 0 0 0 0 V3 V2 V1 V0 U3 U2 U1 U0
Where :
PU = Power up inconfigured
FP = Field power off
CF = In configuration mode
BD = Bad calibration
DN = Calibration accepted
U = Underrange for specified channel
V = Overrange for specified channel
Dec. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
1794-OF4IXT
Word 0 Read Back Channel 0
Word 1 Read Back Channel 1
Channel Signal
Typ e
Label
Markings
1794-TB2, -TB3, -TB3S, -TB3T,
-TB3TS
1794-TBN
Terminal Shield (1794-TB3T,
-TB3TS
Terminal
+
DC only
Current only
+
+
DC only
I
+
A
B
C
+
+
AC or DC
4-Wire Output
Device
+
1 2 3 4 5 6 7 8 9 10 11 12 13 14 150
Current
Output
Device
Current
Output
Device
Current
Output
Device
Voltage
Output
Device
I I
3-Wire Output
Device
2-Wire Output
Device
3-Wire Output
Device
I
_
_
_
_
_
16-33
34-51
0-15
I RVRIRVR IRVRIRVR
0 12 3 45678
9101112
16
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
17 18 19 20 21 22 23 24 25 26 27 28 29 30 333231
13 1514
16 0 2 4 6 8 10 12 14 33
34 1 3 5 7 9 11 13 15 51
16, 0, 2, 4, 6,
8, 10, 12, 14, 33
34, 1, 3, 5, 7,
9, 11, 13, 15, 51
16
Even Numbered Terminals 0 thru 14
34
Row B
Row C
I
I
+-
+-
AC or DC
4-Wire Current
Transmitter
Current
Input
+
DC only
+
+
Current
Input
2-Wire Current
Transmitter
Current only
+
+
Current
Input
+
+
3-Wire
Transmitter
DC only
Voltage
Input
I
I
51
33
1794-TBN shown
3-Wire
Transmitter
Word 2 Read Back Channel 2
Word 3 Read Back Channel 3
Word 4 PU FP CF 0 Reserved 0 0 0 0 0 BD DN 0
Word 5 0 0 0 0 P3 P2 P1 P0 0 0 0 0 W3 W2 W1 W0
1794-IF2XOF2XT
Word 0 Analog value for Input channel 0
Word 1 Analog value for Input channel 1
Word 2 Read Back Output channel 0
Word 3 Read Back Output channel 1
Word 4 0 Real Time Sample
Word 5 PU FP CF 0 Reserved 0 0 0 0 0 BD DN 0
Word 6 0 0 0 0 P1 P0 0 0 0 0 V1 V0 W1 W0 U1 U0
Where :
PU = Power up inconfigured
FP = Field power off
CF = In configuration mode
BD = Bad calibration
DN = Calibration accepted
P0 thru P3 = Output holding in response to Q0 thru Q3
W0 thru W3 = Wire off current loop status for channels 0 thru 3 respectively
Dec. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
Word 0 EN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Word 1 Channel 3 Filter Channel 2 Filter Channel 1 Filter Channel 0 Filter
Word 2 Ch 3 Configuration Ch 2 Configuration Ch 1 Configuration Ch 0 Configuration
Word 3 0 Real Time Sample Interval
Word 4 IC 1 TR IT 0 0 0 0 RV QK CK GO Channel Number
Word 5 Reserved
Where :
EN = Inable bit (not used on input module)
IC = Initiate Configuration bit
TR = Transparent bit
IT = Interrupt toggle bit
RV = Revert to default bit
QK = Quick calibration
CK = Calibration clock
GO = Gain Offset select
Dec. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
1794-OF4IXT
Word 0 EN S1 S0 0 0 0 0 0 0 0 0 0 0 0 0 0
Word 1 Output Data Channel 0
Word 2 Output Data Channel 1
Word 3 Output Data Channel 2
Word 4 Output Data Channel 3
Word 5 Ch 3 Configuration Ch 2 Configuration Ch 1 Configuration Ch 0 Configuration
Word 6 IC 1 TR IT Q3 Q2 Q1 Q0 RV QK CK GO Channel Number
1794-IF2XOF2XT
Word 0 EN S1 S0 0 0 0 0 0 0 0 0 0 0 0 0 0
Word 1 Analog Output Data - Channel 0
Word 2 Analog Output Data - Channel 1
Word 3 0 0 0 0 0 0 0 0 Input Channel 1 Filter Input Channel 0 Filter
Words 4 Output Channel 1
Configuration
Output Channel 0
Configuration
Input Channel 1
Configuration
Input Channel 0
Configuration
Word 5 0 Real Time Sample Programmed Interval
Word 6 IC 1 TR IT Q1 Q0 0 0 RV QK CK GO Channel Number
Where :
EN = Inable output - 0 = output follows S1/S0; 1 = output enabled
S1/S0 = Safe state source
IC = Initiate Configuration bit
TR = Transparent bit
IT = Interrupt toggle bit
Q0 thru Q3 = Requests for outputs to hold
RV = Revert to default bit
QK = Quick calibration
CK = Calibration clock
GO = Gain Offset select
Dec. 1514131211109876543210
Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
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