Terminal Blocks and Wiring Systems

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Wiring Systems

1756 Digital I/O Module Selection

Bulletin 1756 ControlLogix IFM/XIM and Cable Selection Table

Digital 8-Point and 16-Point I/O Modulesv 

Description of 20-Terminal IFM

Cat. No. for Wiring System Module with Fixed Terminal Block

Cat. No. for Wiring System Module with Removable Terminal Block Socket Assembly (order plugs separately)

I/O Module Cat. No. 1756-…

I A 8 D

I A 1 6

I B 1 6

I C 1 6

I N 1 6

I V 1 6

O A 8

O A 8 D

O A 8 E

O A 1 6

O B 8

O B 1 6 E

O C 8

O N 8

O V 1 6 E

Feed-through

Standard 264V AC/DC Max.

1492-IFM20F

1492-RIFM20FØ

U

X

X

X

X

X

U

U

U

X

U

X

U

U

X

Narrow standard 132V AC/DC Max.

1492-IFM20FN

1492-RIFM20FNz

U

X

X

X

X

X

U

U

U

X

U

X

U

U

X

Extra terminals (2 per I/O) 264V AC/DC Max.

1492-IFM20F-2

1492-RIFM20F-2Ø

U

X

X

X

X

X

U

U

U

X

U

X

U

U

X

3-wire sensor type input devices 132V AC/DC Max.

1492-IFM20F-3

—

—

X

X

X

X

X

—

—

—

—

—

—

—

—

—

LED Indicating

Standard with 24V AC/DC LEDs

1492-IFM20D24

—

—

—

X

—

X

X

—

—

—

—

—

X

—

—

X

Narrow standard with 24V AC/DC LEDs

1492-IFM20D24N

—

—

—

X

—

X

X

—

—

—

—

—

X

—

—

—

Standard with 120V AC/DC LEDs

1492-IFM20D120 ‡

—

U

X

—

—

—

—

—

—

—

—

—

—

—

—

—

Narrow standard with 120V AC LEDs

1492-IFM20D120N

—

U

X

—

—

—

—

—

—

—

X

—

—

—

—

—

24V AC/DC LEDs and extra terminals for outputs

1492-IFM20D24-2

—

—

—

—

—

—

—

—

—

—

—

—

X

—

—

X

24V AC/DC LEDs and extra terminals for inputs

1492-IFM20D24A-2

—

—

—

X

—

X

X

—

—

—

—

—

—

—

—

—

120V AC LEDs and extra terminals for outputs

1492-IFM20D120-2

—

—

—

—

—

—

—

—

—

—

X

—

—

—

—

—

120V AC LEDs and extra terminals for inputs

1492-IFM20D120A-2

—

U

X

—

—

—

—

—

—

—

—

—

—

—

—

—

3-wire sensor with 24V AC/DC LEDs

1492-IFM20D24-3

—

—

—

X

—

X

X

—

—

—

—

—

—

—

—

—

8 Individually isolated with 24/48V AC/DC LEDs and 4 terminals/output

1492-IFM20DS24-4

—

—

—

—

—

—

—

—

—

—

—

W

—

W

W

—

8 Individually isolated with 120V AC LEDs and 4 terminals/output

1492-IFM20DS120-4

—

—

—

—

—

—

—

W

V

V

—

—

—

—

—

—

240V AC LEDs and extra terminals for outputs

1492-IFM20D240-2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

240V AC LEDs and extra terminals for inputs

1492-IFM20D240A-2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Fusible

120V AC/DC with extra terminals for outputs

1492-IFM20F-F-2

1492-RIFM20F-F-2Ø

—

—

—

—

—

—

—

—

—

X

—

X

—

—

X

Extra terminals with 24V AC/DC blown fuse LED indicators

1492-IFM20F-F24-2

1492-RIFM20F-F24-2Ø

—

—

—

—

—

—

—

—

—

—

—

X

—

—

X

Extra terminals with 120V AC/DC blown fuse LED indicators

1492-IFM20F-F120-2

1492-RIFM20F-F120-2Ø

—

—

—

—

—

—

—

—

—

X

—

—

—

—

—

Extra terminals with 240V AC/DC blown fuse LED indicators

1492-IFM20F-F240-2

—

—

—

—

—

—

—

—

—

—

X

—

—

—

—

—

Extra terminals with 24V AC/DC blown fuse LED indicators for inputs

1492-IFM20F-F24A-2

1492-RIFM20F-F24A-2Ø

—

—

X

—

X

—

—

—

—

—

—

—

—

—

—

Extra terminals with 120V AC/DC blown fuse LED indicators for inputs

1492-IFM20F-F120A-2

1492-RIFM20F-F120A-2Ø

—

X

—

—

—

—

—

—

—

—

—

—

—

—

—

8 Individually isolated 120V AC/DC with extra terminals for outputs

1492-IFM20F-FS-2

—

—

—

—

—

—

—

W

V

V

—

W

—

W

W

—

8 Individually isolated with extra terminals and 24V AC/DC blown fuse LED indicators

1492-IFM20F-FS24-2

—

—

—

—

—

—

—

—

—

—

—

W

—

W

W

—

Two 4-point isolated groups with four terminals/input and 24V AC/DC blown fuse LED indicators

1492-IFM20F-FS24A-4

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

8 Individually isolated with extra terminals/output and 120V AC/DC blown fuse LED indicators

1492-IFM20F-FS120-2

—

—

—

—

—

—

—

W

V

V

—

—

—

—

—

—

8 Individually isolated with 4 terminals/output and 120V AC/DC blown fuse LED indicators

1492-IFM20F-FS120-4

—

—

—

—

—

—

—

W

V

V

—

—

—

—

—

—

Two 4-point isolated groups with four terminals/input and 120V AC/DC blown fuse indicators

1492-IFM20F-FS120A-4

—

U

—

—

—

—

—

—

—

—

—

—

—

—

—

—

8 Individually isolated with 4 terminals/output and 240V AC/DC blown fuse LED indicators

1492-IFM20F-FS240-4

—

—

—

—

—

—

—

W

—

—

—

—

—

—

—

—

Relay Master (LED Indicating) § §

20-pin master with eight 24V DC relays

1492-XIM2024-8R

—

—

—

—

—

—

—

—

—

—

—

—

X

—

—

—

20-pin master with sixteen 24V DC relays

1492-XIM2024-16R

—

—

—

—

—

—

—

—

—

—

—

—

X

—

—

—

20-pin master with sixteen 24V DC relays with fusing

1492-XIM2024-16RF

—

—

—

—

—

—

—

—

—

—

—

—

X

—

—

—

20-pin master with eight 120V AC relays

1492-XIM20120-8R

—

—

—

—

—

—

—

—

—

—

X

—

—

—

—

—

20-pin master with sixteen 120V AC relays

1492-XIM20120-16R

—

—

—

—

—

—

—

—

—

—

X

—

—

—

—

—

20-pin master with sixteen 120V AC relays with fusing

1492-XIM20120-16RF

—

—

—

—

—

—

—

—

—

—

X

—

—

—

—

—

Relay Expander (LED Indicating)§ §

Expander with eight 24V DC relays

1492-XIM24-8R

1492-RXIM24-8Rv

—

—

—

—

—

—

—

—

—

—

—

¬

—

—

—

Expander with eight 120V AC relays

1492-XIM120-8R

—

—

—

—

—

—

—

—

—

—

¬

—

—

—

—

—

Fusible Expander

8-channel expander with 24V DC blown fuse indicators

1492-XIMF-F24-2

—

—

—

—

—

—

—

—

—

—

—

—

¬

—

—

—

8-channel expander with 120V AC blown fuse indicators

1492-XIMF-F120-2

—

—

—

—

—

—

—

—

—

—

¬

—

—

—

—

—

Feed-through Expander

Expander with eight feed-through channels 132V AC/DC max

1492-XIMF-2

—

—

—

—

—

—

—

—

—

—

¬

—

¬

—

—

—

¬ Can have up to one (1) expander module depending upon master used (total 16 outputs or less). An extender cable is provided.

T Cables are available in standard lengths of 0.5 m, 1.0 m, 2.5 m, and 5.0 m. To order, insert the code for the desired cable length into the catalog number, e.g., 005 = 0.5 m (010 = 1.0 m, 025 = 2.5 m, and 050 = 5.0 m), and insert the letter in the box. Example: Catalog Number 1492-CABLE050W is for a 5.0 m cable, and the letter W.

‡ This IFM is not recommended for use with PLC I/P modules that have an off-state leakage current exceeding 0.5 mA. Use a 1492-IFM20D120N or 1492-20D120A-2 for inputs. Use 1492-IFM20D120-2 for outputs.

§ The LED indicates the PLC output status.

Ø Compatible RTB plug 1492-RTB20N (screw style terminal) or 1492-RTB20P (push-in style). Order plugs separately. 2 plugs per cat. no.

z  Compatible RTB plug 1492-RTB10N (screw style terminal) or 1492-RTB10P (push-in style). Order plugs separately. 2 plugs per cat. no.

v Compatible RTB plug 1492-RTB12N (screw style terminal) or 1492-RTB12P (push-in style). Order plugs separately. 2 plugs per cat. no.

§ The voltage rating is relay contro/coil voltage. Refer to the Specifications tab.

Note:Footnotes are on page 12-136.

Bulletin 1756 ControlLogix IFMs and Cables, Continued

Digital 16-Point Isolated and 32-Point I/O Modules ¬ 

Description of 40-Terminal IFM

Cat. No. with Wiring System Module with Fixed Terminal Block

Cat. No. for Wiring System Module with Removable Terminal Block Socket Assembly (order plugs separately)

I/O Module Cat. No. 1756-…

I A 1 6 I

I B 1 6 D

I B 1 6 I

I A 3 2

I B 3 2

I V 3 2

I H 1 6 I

I M 1 6 I

O A 1 6 I

O B 8 E I

O B 1 6 D

O B 1 6 I

O B 1 6 I S

O B 3 2

O V 3 2 E

O H 8 I

O W 1 6 I

O X 8 I

Feed-through

Standard 132V AC/DC Max.

1492-IFM40F

1492-RIFM40Fª

Y

Y

Y

Z

Z

Z

Y

—

Y

Y

Y

Y

Y

Z

Z

Y

Y

Y

Extra terminals (2 per I/O) 132V AC/DC Max.

1492-IFM40F-2

1492-RIFM40F-2ª

—

Y

—

Z

Z

Z

—

—

—

—

Y

—

—

Z

Z

—

—

—

3-wire sensor type input devices 60V AC/DC Max.

1492-IFM40F-3

—

—

—

—

—

Z

Z

—

—

—

—

—

—

—

—

—

—

—

—

LED Indicating

Standard with 24V AC/DC LEDs

1492-IFM40D24

1492-RIFM40D24ª

—

—

—

—

Z

Z

—

—

—

—

—

—

—

Z

Z

—

—

—

24V AC/DC LEDs and extra terminals for outputs

1492-IFM40D24-2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Z

Z

—

—

—

24V AC/DC LEDs and extra terminals for inputs

1492-IFM40D24A-2

1492-RIFM40D24A-2ª

—

—

—

—

Z

Z

—

—

—

—

—

—

—

—

—

—

—

—

120V AC LEDs and extra terminals for outputs

1492-IFM40D120-2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

120V AC LEDs and extra terminals for inputs

1492-IFM40D120A-2

—

—

—

—

Z

—

—

—

—

—

—

—

—

—

—

—

—

—

—

3-wire sensor with 24V AC/DC LEDs

1492-IFM40D24-3

—

—

—

—

—

Z

Z

—

—

—

—

—

—

—

—

—

—

—

—

16 individually isolated with 24/48V AC/DC LEDs and four terminals/output

1492-IFM40DS24-4

—

—

—

—

—

—

—

—

—

—

Y

Y13

Y

Y

—

—

—

Y

Y

16 individually isolated with 24V AC/DC LEDs and four terminals/input

1492-IFM40DS24A-4

—

—

Y

Y

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

16 individually isolated with 120V AC LEDs and four terminals/output

1492-IFM40DS120-4

—

—

—

—

—

—

—

—

—

Y

—

—

—

—

—

—

—

Y

Y

16 individually isolated with 120V AC LEDs and four terminals/input

1492-IFM40DS120A-4

—

Y

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

16 individually isolated with 240V AC LEDs and four terminals/input

1492-IFM40DS240A-4

—

—

—

—

—

—

—

—

Y

—

—

—

—

—

—

—

—

—

—

Fusible

120V AC/DC with extra terminals for 32-point outputs

1492-IFM40F-F-2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Z

Z

—

—

—

Extra terminals with 24V AC/DC blown fuse indicators for 32-point outputs

1492-IFM40F-F24-2

1492-RIFM40F-F24-2ª

—

—

—

—

—

—

—

—

—

—

—

—

—

Z

Z

—

—

—

16 individually fused with 24V DC blown fuse low leakage (0.05 mA) LED circuit, 2 isolated groups, 2 terminals/output

1492-IFM40F-F24D-2

—

—

—

—

—

—

—

—

—

—

—

Y

—

—

—

—

—

—

—

Individually fused with 24V DC blown fuse low leakage (0.05 mA) LED circuit, 4 isolated groups, 4 terminals/input

1492-IFM40F-F24AD-4

—

—

Y

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Extra terminals with 120V AC/DC blown fuse indicators for outputs

1492-IFM40F-F120-2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

16 individually isolated with extra terminals for 120V AC/DC outputs

1492-IFM40F-FS-2

—

—

—

—

—

—

—

—

—

Y

Y

Y

Y12

Y12

—

—

Y

Y

Y

16 individually isolated with extra terminals and 24V AC/DC blown fuse indicators

1492-IFM40F-FS24-2

—

—

—

—

—

—

—

—

—

—

Y

T

Y12

Y12

—

—

—

Y

Y

16 individually isolated with 24V AC/DC blown fuse indicators and four terminals/output

1492-IFM40F-FS24-4

—

—

—

—

—

—

—

—

—

—

Y

T

Y12

Y12

—

—

—

Y

Y

16 individually isolated 240V AC/DC with four terminals/output

1492-IFM40F-FS-4

—

—

—

—

—

—

—

—

—

Y

Y

Y

Y12

Y12

—

—

—

Y

Y

16 individually isolated with extra terminals and 120V AC/DC blown fuse LED indicators

1492-IFM40F-FS120-2

1492-RIFM40F-FS120-2ª

—

—

—

—

—

—

—

—

Y

—

—

—

—

—

—

Y

Y

Y

16 individually isolated with 120V AC/DC blown fuse indicators and four terminals/output

1492-IFM40F-FS120-4

1492-RIFM40F-FS120-4v

—

—

—

—

—

—

—

—

Y

—

—

—

—

—

—

—

Y

Y

16 individually isolated with 240V AC/DC blown fuse indicators and four terminals/output

1492-IFM40F-FS240-4

—

—

—

—

—

—

—

—

—

Y

—

—

—

—

—

—

—

Y

Y

16 individually isolated with 24V AC/DC blown fuse indicators and four terminals/input

1492-IFM40F-FS24A-4

—

—

‡

Y

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

16 individually isolated with 120V AC/DC with four terminals/input

1492-IFM40F-FSA-4

—

Y

Y

Y

—

—

—

Y

—

—

—

—

—

—

—

—

—

—

—

16 individually isolated with 120V AC/DC blown fuse indicators and four terminals/input

1492-IFM40F-FS120A-4

1492-RIFM40F-FS120A-4v

Y

—

—

—

—

—

Y

—

—

—

—

—

—

—

—

—

—

—

16 individually isolated with 240V AC/DC blown fuse indicators and four terminals/input

1492-IFM40F-FS240A-4

—

—

—

—

—

—

—

—

Y

—

—

—

—

—

—

—

—

—

—

Relay Master (LED Indicating)§ §

40-pin master with eight 24V DC relays

1492-XIM4024-8R

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Z

—

—

—

—

40-pin master with sixteen 24V DC relays

1492-XIM4024-16R

1492-RXIM4024-16Rª

—

—

—

—

—

—

—

—

—

—

—

—

—

Z

—

—

—

—

40-pin master with sixteen 24V DC relays with fusing

1492-XIM4024-16RF

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Z

—

—

—

—

Relay Expander (LED Indicating)§ §

Expander with eight 24V DC relays

1492-XIM24-8R

1492-RXIM24-8R11

—

—

—

—

—

—

—

—

—

—

—

—

—

Ø

—

—

—

—

Expander with eight 120V AC relays

1492-XIM120-8R

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Fusible Expander

8-channel expander with 24V DC blown fuse indicators

1492-XIMF-F24-2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Ø

—

—

—

—

8-channel expander with 120V AC blown fuse indicators

1492-XIMF-F120-2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Expander with sixteen 24V DC relays with fusing

1492-XIM24-16RF

—

—

—

—

—

—

—

—

—

—

—

—

—

—

z

—

—

—

—

Feed-through Expander

Expander with eight feed-through channels 132V AC/DC max

1492-XIMF-2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Ø

—

—

—

—

¬ Cables are available in standard lengths of 0.5, 1.0, 2.5, and 5.0 m. To order, insert the code for the desired cable length into the catalog number, e.g., 005 = 0.5 m (010 = 1.0 m, 025 = 2.5 m, and 050 = 5.0 m), and insert the letter in the box. Example: Catalog Number 1492-CABLE050W is for a 5.0 m cable, and the letter Y.

T The 1492-IFM40F-FS24-2 and 1492-IFM40F-FS24-4 module and 1492-CABLET Y cable can be used with the 1756-OB16D module. However, due to the 1492-IFM40F-FS24-2 and 1492-IFM40F-Fs24-4 module's blown fuse leakage current ratings, the "no load" diagnostic function of the 1756-OB16D will not indicate a blown or removed fuse as a no load condition. If you require this diagnostic to function for a blown or removed fuse, you must use a 1492-IFM40F-F24D-2.

‡ The 1492-IFM40F-FS24A-4 module and 1492-CABLET Y cable can be used with the 1756-IB16D module. However, due to the 1492-IFM40F-FS24A-4 module's blown fuse leakage current rating, the "wire off" diagnostic function of the 1756-IB16D will not indicate a blown or removed fuse as a wire off condition. If you require this diagnostic to function for a blown or removed fuse, you must use a 1492-IFM40F-F24AD-4.

§ The LED indicates the PLC output status.

Ø Can have up to 2 or 3 expander modules depending upon master used (total 32 outputs or less). An extender cable is provided.

z One 1492-XIM24-16RF is to be used with one 1492-XIM4024-16R or 1492-XIM4024-16RF master (32 pt. only).

ª  Compatible RTB plug; 1492-RTB20N (screw style terminal) or 1492-RTB20P(push-in style terminal). ORDER PLUGS SEPARATELY. 2 plugs per cat. no.

v  Compatible RTB plug; 1492-RTB17N (screw style terminal) or 1492-RTB17P (push-in style terminal). ORDER PLUGS SEPARATELY. 2 plugs per cat. no.

ª  Compatible RTB plug; 1492-RTB14N (screw style terminal) or 1492-RTB14P(push-in style terminal). ORDER PLUGS SEPARATELY. 2 plugs per cat. no.

11 Compatible RTB plug; 1492-RTB12N (screw style terminal) or 1492-RTB12P(push-in style terminal). ORDER PLUGS SEPARATELY. 2 plugs per cat. no.

12 Do not use this module in output sinking mode with fused IFM moduls as the IFM module fuses will not properly protect the circuit.

13 IFMs LED provides PLC output ON/OFF indication. Due to the magnitude of current through the LED, the 1756-0B16D PLC module “No Load” diagnostic function will not work. If this function is required, use the Cat. No. 1492-IFM40F-2.

§ The voltage rating is relay contro/coil voltage. Refer to the Specifications tab.

Note:Footnotes are on page 12-138.

Bulletin 1756 ControlLogix IFMs and Cables, Continued

These pre-wired cables have a pre-wired RTB on one end to connect to the front of a Bulletin 1756 digital I/O module and a connector on the other end to plug into a 20- or 40-terminal IFM/XIM. You must first select the IFM/XIM from one of the preceding selection tables.

Pre-Wired Cables for Bulletin 1756 Digital I/O Modules

Cable Cat. No.	Standard Cable Lengths	Build-to-Order Available	No. of Conductors	Mating I/O Module Cat. No.
1492-CABLE¬ U	0.5, 1.0, 2.5, 5.0 m	Yes	20	1756-IA8D, -OA8, -OA8D, -OA8E, -OB8, -OC8, -ON8
1492-CABLE¬ V	0.5, 1.0, 2.5, 5.0 m	Yes	20	1756-OA8D, -OA8E
1492-CABLE¬ W	0.5, 1.0, 2.5, 5.0 m	Yes	20	1756-OA8, -OB8, -OC8, -ON8
1492-CABLE¬ X	0.5, 1.0, 2.5, 5.0 m	Yes	20	1756-IA16, -IB16, -IC16, -IN16, -IV16, -OA16, -OB16E, -OV16E
1492-CABLE¬ Y	0.5, 1.0, 2.5, 5.0 m	Yes	40	1756-IA16I, -IB16D, -IB16I, -IH16, -IM16I, -OA16I, -OB8EI, -OB16D, -OB16I, -OB16IS, -OH8I, -OW16I, -OX8I
1492-CABLE¬ Z	0.5, 1.0, 2.5, 5.0 m	Yes	40	1756-IB32, -IV32, -IA32, -OB32, -OV32E
¬ Cables are available in standard lengths of 0.5 m, 1.0 m, 2.5 m, and 5.0 m. To order, insert the code for the desired cable length into the cat. no. (005 = 0.5 m, 010 = 1.0 m, 025 = 2.5 m, and 050 = 5.0 m). Example: Cat. No. 1492-CABLE005Y is for a 0.5 m cable that could be used to connect a Cat. No. 1492-IFM40F IFM to a Cat. No. 1756-IA16I I/O module.

The I/O module-ready cables have a pre-wired RTB on one end to plug onto the front of a Bulletin 1756 I/O module and 20 or 40 individually colored #18 AWG conductors on the other end. These cables provide the convenience of pre-wired connections at the I/O module end, while still allowing the flexibility to fieldwire to standard terminal blocks of your choice.

I/O Module-Ready Cables for Bulletin 1756 Digital I/O Modules ‡ 

Cable Cat. No.	Standard Cable Lengths	Build-to-Order Available	No. of Conductors	Mating I/O Module Cat. No.
1492-CABLET TBNH	1.0, 2.5, 5.0 m	Yes	20	1756-IA8D, -IA16, -IB16, -IC16, -IN16, -IV16, -OA8, -OA8D, -OA8E, -OA16, -OB8, -OB16E, -OC8, -ON8, -OV16E
1492-CABLET TBCH	1.0, 2.5, 5.0 m	Yes	40	1756-IA16I, -IA32, -IB16D, -IB16I, -IB32, -IV32, -IH16I, -IM16I, -OA16I, -OB8EI, -OB16D, -OB16IS, -OB16I, -OB32, -OV32E, -OH8I, -OW16I, -OX8I
T Cables are available in standard lengths of 1.0 m, 2.5 m, and 5.0 m. To order, insert the code for the desired cable length into the cat. no. (010 = 1.0 m, 025 = 2.5 m, and 050 = 5.0 m). Example: Cat. No. 1492-CABLE050TBNH is for a 5.0 m cable with a pre-wired Cat. No. 1756-TBNH RTB on one end.
‡ Discrete I/O read cables should not be used with PLC analog I/O modules as cable shield and drain wires are not provided.