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1746 Digital I/O Module Selection

Bulletin 1746 SLC 500 IFM/XIM and Cable Selection Table

Digital 16-Point and 8-Point Isolated I/O Modules T 

Description of 20-Pin IFM

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

Cat. No. for Module with Removable Terminal Block (RTB)

I/O Module Cat. No. 1746-…

I A 1 6

I B 1 6

I C 1 6

I G 1 6

I H 1 6

I M 1 6

I N 1 6

I T B 1 6

I T V 1 6

I V 1 6

O A 1 6

O B 1 6

O B 1 6 E

O B P 1 6

O G 1 6

O V 1 6

O V P 1 6

O W 1 6

O X 8

sc- I A 8 I ‡

sc- I B 8 I ‡

s c I C 8 I ‡

s c O A P 8 1 ‡

Feed-through

Standard 264V AC/DC Max.

1492-IFM20F

1492-RIFM20Fz

A

B

B

E

B

A

B

B

B

B

C

E

E

E

E

E

E

D

D

A

B

B

A

Narrow standard 132V AC/DC Max.

1492-IFM20FN

1492-RIFM20FNª

A

B

B

E

B

—

B

B

B

B

G

E

E

E

E

E

E

N

N

A

B

B

A

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

1492-IFM20F-2

1492-RIFM20F-2z

A

B

B

E

B

A

B

B

B

B

C

E

E

E

E

E

E

D

—

—

—

—

—

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

1492-IFM20F-3

—

A

B

B

E

B

—

B

B

B

B

—

—

—

—

—

—

—

—

—

—

—

—

—

LED Indicating

Standard with 24V AC/DC LEDs

1492-IFM20D24

—

—

B

—

—

—

—

B

B

B

B

—

E

E

E

—

E

E

D

—

—

—

—

—

Narrow standard with 24V AC/DC LEDs

1492-IFM20D24N

—

—

B

—

—

—

—

B

B

B

B

—

E

E

E

—

—

—

N

—

—

—

—

—

Standard with 120V AC/DC LEDs

1492-IFM20D120§

—

A

—

—

—

B

—

—

—

—

—

C

—

—

—

—

—

—

D

—

—

—

—

—

Narrow standard with 120V AC LEDs

1492-IFM20D120N

—

A

—

—

—

—

—

—

—

—

—

G

—

—

—

—

—

—

N

—

—

—

—

—

24V AC/DC LEDs and extra terminals for outputs

1492-IFM20D24-2

—

—

—

—

—

—

—

—

—

—

—

—

E

E

E

—

E

E

D

—

—

—

—

—

24V AC/DC LEDs and extra terminals for inputs

1492-IFM20D24A-2

—

—

B

—

—

—

—

B

B

B

B

—

—

—

—

—

—

—

—

—

—

—

—

—

120V AC LEDs and extra terminals for outputs

1492-IFM20D120-2

—

—

—

—

—

—

—

—

—

—

—

C

—

—

—

—

—

—

D

—

—

—

—

—

120V AC LEDs and extra terminals for inputs

1492-IFM20D120A-2

—

A

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

3-wire sensor with 24V AC/DC LEDs

1492-IFM20D24-3

—

—

B

—

—

—

—

B

B

B

B

—

—

—

—

—

—

—

—

—

—

—

—

—

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

1492-IFM20DS24-4

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

S

—

—

—

—

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

1492-IFM20DS120-4

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

S

—

—

—

—

240V AC LEDs and extra terminals for outputs

1492-IFM20D240-2

—

—

—

—

—

—

—

—

—

—

—

C

—

—

—

—

—

—

D

—

—

—

—

—

240V AC LEDs and extra terminals for inputs

1492-IFM20D240A-2

—

—

—

—

—

—

A

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Fusible

120V AC/DC with extra terminals for outputs

1492-IFM20F-F-2

1492-RIFM20F-F-2z

—

—

—

—

—

—

—

—

—

—

C

E

E

E

—

E

E

D

—

—

—

—

—

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

1492-IFM20F-F24-2

1492-RIFM20F-F24-2z

—

—

—

—

—

—

—

—

—

—

—

E

E

E

—

E

E

D

—

—

—

—

—

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

1492-IFM20F-F120-2

1492-RIFM20F-F120-2z

—

—

—

—

—

—

—

—

—

—

C

—

—

—

—

—

—

D

—

—

—

—

—

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

1492-IFM20F-F240-2

—

—

—

—

—

—

—

—

—

—

—

C

—

—

—

—

—

—

D

—

—

—

—

—

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

1492-IFM20F-F24A-2

1492-RIFM20F-F24A-2z

—

B

—

—

—

—

B

B

—

—

—

—

—

—

—

E

E

—

—

—

—

—

—

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

1492-IFM20F-F120A-2

1492-RIFM20F-F120A-2z

A

—

—

—

B

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

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

1492-IFM20F-FS-2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

S

—

—

—

—

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

1492-IFM20F-FS24-2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

S

—

—

—

—

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

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

S

—

—

—

A

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

1492-IFM20F-FS120-4

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

S

—

—

—

—

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

1492-IFM20F-FS120A-4

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

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

1492-IFM20F-FS240-4

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

S

—

—

—

A

Relay Master (LED Indicating) § Ø

20-pin master with eight 24V DC relays

1492-XIM2024-8R

—

—

—

—

—

—

—

—

—

—

—

—

E

E

E

—

—

—

—

—

—

—

—

—

20-pin master with eight 120V AC relays

1492-XIM20120-8R

—

—

—

—

—

—

—

—

—

—

—

CR

—

—

—

—

—

—

—

—

—

—

—

—

20-pin master with sixteen 24V DC relays

1492-XIM2024-16R

—

—

—

—

—

—

—

—

—

—

—

—

E

E

E

—

—

—

—

—

—

—

—

—

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

1492-XIM2024-16RF

—

—

—

—

—

—

—

—

—

—

—

—

E

E

E

—

—

—

—

—

—

—

—

—

20-pin master with sixteen 120V AC relays

1492-XIM20120-16R

—

—

—

—

—

—

—

—

—

—

—

CR

—

—

—

—

—

—

—

—

—

—

—

—

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

1492-XIM20120-16RF

—

—

—

—

—

—

—

—

—

—

—

CR

—

—

—

—

—

—

—

—

—

—

—

—

Relay Expander (LED Indicating) § Ø

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

—

—

—

—

—

—

—

—

—

—

—

¬

¬

¬

¬

—

—

—

—

—

—

—

—

A

¬ Can have up to 1 expandable module depending upon master used (total 16 pts or less), extender cable is provided.

T Pre-wired cables are available in standard length 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 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 1402-CABLE050A is for a 5.0 m cable, and the letter A.

‡ For information concerning this I/O module, contact Spectrum Controls (phone: 425.641.9473 or www.spectrumcontrols.com).

§ This IFM is not recommended for use with PLC I/O modules that have an off-state leakage current exceeding 0.5 mA. Use a Cat. No. 1492‑IFM20D120N or 1492‑IFM20D120A‑2 for inputs. Use 1492‑IFM20D120‑2 for outputs.

Ø The LED indicates the PLC output status.

z Compatible RTB plug 1492-RTB20N (screw style terminal) or 1492-RTB20P (push-in style). Order plugs separately. Two plugs per catalog number.

ª Compatible RTB plug 1492-RTB10N (screw style terminal) or 1492-RTB10P (push-in style). Order plugs separately. Two plugs per catalog number.

v Compatible RTB plug 1492-RTB12N (screw style terminal) or 1492-RTB12P (push-in style). Order plugs separately. Two plugs per catalog number.

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

Bulletin 1746 SLC 500 IFMs and Cables, Continued

Digital 32-Point I/O Modules T 

Description of 40-Pin 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. 1746-…
			I B 3 2	I V 3 2	O B 3 2	O B 3 2 E	O V 3 2
Feed-through
Standard 132V AC/DC Max.	1492-IFM40F	1492-RIFM40FØ	H	H	H	H	H
Extra terminals (2 per I/O) 132V AC/DC Max.	1492-IFM40F-2	1492-RIFM40F-2Ø	H	H	H	H	H
3-wire sensor type input devices 60V AC/DC Max.	1492-IFM40F-3	—	H	H	—	—	—
LED Indicating
Standard with 24V AC/DC LEDs	1492-IFM40D24	1492-RIFM40D24Ø	H	H	H	H	H
24V AC/DC LEDs and extra terminals for outputs	1492-IFM40D24-2	—	—	—	H	H	H
24V AC/DC LEDs and extra terminals for inputs	1492-IFM40D24A-2	1492-RIFM40D24A-2Ø	H	H	—	—	—
120V AC LEDs and extra terminals for outputs	1492-IFM40D120-2	—	—	—	—	—	—
120V AC LEDs and extra terminals for inputs	1492-IFM40D120A-2	—	—	—	—	—	—
3-wire sensor with 24V AC/DC LEDs	1492-IFM40D24-3	—	H	H	—	—	—
16 individually isolated with 24/48V AC/DC LEDs and four terminals/output	1492-IFM40DS24-4	—	—	—	—	—	—
16 individually isolated with 24V AC/DC LEDs and four terminals/input	1492-IFM40DS24A-4	—	—	—	—	—	—
16 individually isolated with 120V AC LEDs and four terminals/output	1492-IFM40DS120-4	—	—	—	—	—	—
16 individually isolated with 120V AC LEDs and four terminals/input	1492-IFM40DS120A-4	—	—	—	—	—	—
16 individually isolated with 240V AC LEDs and four terminals/input	1492-IFM40DS240A-4	—	—	—	—	—	—
Fusible
120V AC/DC with extra terminals for 32-point outputs	1492-IFM40F-F-2	—	—	—	H	H	H
Extra terminals with 24V AC/DC blown fuse indicators for 32-point outputs	1492-IFM40F-F24-2	1492-RIFM40F-F24-2Ø	—	—	H	H	H
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	—	—	—	—	—	—
16 individually isolated with extra terminals and 24V AC/DC blown fuse indicators	1492-IFM40F-FS24-2	—	—	—	—	—	—
16 individually isolated with 24V AC/DC blown fuse indicators and four terminals/output	1492-IFM40F-FS24-4	—	—	—	—	—	—
16 individually isolated 240V AC/DC with four terminals/output	1492-IFM40F-FS-4	—	—	—	—	—	—
16 individually isolated with extra terminals and 120V AC/DC blown fuse LED indicators	1492-IFM40F-FS120-2	1492-RIFM40F-FS120-2Ø	—	—	—	—	—
16 individually isolated with 120V AC/DC blown fuse indicators and four terminals/output	1492-IFM40F-FS120-4	1492-RIFM40F-FS120-4z	—	—	—	—	—
16 individually isolated with 240V AC/DC blown fuse indicators and four terminals/output	1492-IFM40F-FS240-4	—	—	—	—	—	—
16 individually isolated with 24V AC/DC blown fuse indicators and four terminals/input	1492-IFM40F-FS24A-4	—	—	—	—	—	—
16 individually isolated with 120V AC/DC with four terminals/input	1492-IFM40F-FSA-4	—	—	—	—	—	—
16 individually isolated with 120V AC/DC blown fuse indicators and four terminals/input	1492-IFM40F-FS120A-4	1492-RIFM40F-FS120A-4z	—	—	—	—	—
16 individually isolated with 240V AC/DC blown fuse indicators and four terminals/input	1492-IFM40F-FS240A-4	—	—	—	—	—	—
Relay Master (LED Indicating) § §
40-pin master with eight 24V DC relays	1492-XIM4024-8R	—	—	—	H	H	—
40-pin master with sixteen 24V DC relays	1492-XIM4024-16R	1492-RXIM4024-16Rª	—	—	H	H	—
40-pin master with sixteen 24V DC relays with fusing	1492-XIM4024-16RF	—	—	—	H	H	—
Relay Expander (LED Indicating) § §
Expander with eight 24V DC relays	1492-XIM24-8R	1492-RXIM24-8Rv	—	—	¬	¬	—
Expander with sixteen 24V DC relays with fusing	1492-XIM24-16RF	—	—	—	‡	‡	—
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 2 or 3 expandable modules depending upon master used (total 32 pts or less), extender cable is provided.
T Pre-wired cables are available in standard length 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 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 1402-CABLE050A is for a 5.0 m cable, and the letter A.
‡ 1492-XIM24-16RF is to be used with 1492-XIM4024-16R and 1492-XIM4024-16RF 32 pt. only.
§ The LED indicates the PLC output status.
Ø  Compatible Removable Terminal Block (RTB) plug; 1492-RTB20N (screw style terminal) or 1492-RTB20P (push-in style). ORDER PLUGS SEPARATELY. Two plugs per cat. no.
z  Compatible Removable Terminal Block (RTB) plug; 1492-RTB17N (screw style terminal) or 1492-RTB17P (push-in style). ORDER PLUGS SEPARATELY. Two plugs per cat. no.
ª  Compatible Removable Terminal Block (RTB) plug; 1492-RTB14N (screw style terminal) or 1492-RTB14P (push-in style). ORDER PLUGS SEPARATELY. Two plugs per cat. no.
v  Compatible Removable Terminal Block (RTB) plug; 1492-RTB12N (screw style terminal) or 1492-RTB12P (push-in style). ORDER PLUGS SEPARATELY. Two plugs per cat. no.

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

Bulletin 1746 SLC 500 IFMs and Cables, Continued

These pre-wired cables have a pre-wired RTB on one end to connect to the front of a Bulletin 1746 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 1746 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¬ A	0.5, 1.0, 2.5, 5.0 m	Yes	20	1746-IA16, -IM16
1492-CABLE¬ B	0.5, 1.0, 2.5, 5.0 m	Yes	20	1746-IB16, -IH16, -IN16, -ITB16, -ITV16
1492-CABLE¬ C	0.5, 1.0, 2.5, 5.0 m	Yes	20	1746-OA16
1492-CABLE¬ CR	0.5, 1.0, 2.5, 5.0 m	Yes	20	1746-OA16
1492-CABLE¬ D	0.5, 1.0, 2.5, 5.0 m	Yes	20	1746-OW16, -OX8
1492-CABLE¬ E	0.5, 1.0, 2.5, 5.0 m	Yes	20	1746-IG16, -OB16, -OB16E, -OBP16, -OG16, -OV16, -OVP16
1492-CABLE¬ G	0.5, 1.0, 2.5, 5.0 m	Yes	20	1746-OA16
1492-CABLE¬ H	0.5, 1.0, 2.5, 5.0 m	Yes	40	1746-IB32, -IV32, -OB32, -OB32E, -OV32
1492-CABLE¬ N	0.5, 1.0, 2.5, 5.0 m	Yes	20	1746-OW16, -OX8
1492-CABLE¬ S	0.5, 1.0, 2.5, 5.0 m	Yes	20	1746-OX8
¬ Pre-wired 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 cat. no. (005 = 0.5 m, 010 = 1.0 m, 025 = 2.5 m, and 050 = 5.0 m). Example: Cat. No. 1492-CABLE005N is for a 0.5 m cable that could be used to connect a Cat. No. 1492-IFM20D24N IFM to a Cat. No. 1746-OW16 I/O module. Build-to-order lengths are also available.

The I/O module-ready cables have a pre-wired RTB on one end to plug onto the front of a Bulletin 1746 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 1746 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 N3	1.0, 2.5, 5.0 m	Yes	40	1769-IQ32T, -OB32T, -OV32T
1492-CABLET RTBB	1.0, 2.5, 5.0 m	Yes	20	1746-IB16, -IC16, -IG16, -IH16, -IN16, -ITB16, -ITV16, -IV16, -OB16, -OB16E, -OBP8, -OBP16, -OG16, -OV16, -OVP16
1492-CABLET RTBO	1.0, 2.5, 5.0 m	Yes	20	1746-OW16, -OX8
1492-CABLET RTBR	1.0, 2.5, 5.0 m	Yes	20	1746-IA16, -OA16, -OAP12, -IM16
T I/O ready cables are available in standard lengths of 1.0, 2.5, 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-CABLE050RTBR is for a 5.0 m cable with a pre-wired Cat. No. 1746-RT25R RTB on one end.
‡ Digital I/O module-ready cables should not be used with analog module as a cable shield and drain wire is not provided.

Note:The following I/O Modules do not have RTBs: 1746-IA4, 1746-IA8, 1746-IB8, 1746-IM4, 1746-IM8, 1746-IV8, 1746-OA8, 1746-OB8.