Allen-Bradley 1746-IB16, 1746-IA4, 1746-IC16, 1746-IB8, 1746-IH16 Installation Instructions Manual

Discrete I/O Modules

(Catalog Number 1746 Series)

Installation In st ru ct io ns

Input Module Catalog Numbers:
1746-IA4, -IA8, -IA16, -IB8, -IB16, -IC16, -IG16, -IH16, -IM4,

-IM8, -IM16,

-IN16, -ITB16, -ITV16, -IV8, -IV16
Output Module Catalog Numbers:

1746-OA8, -OA16, -OAP12, -OB8, -OB6EI, -OB16, -OB16E,

-OBP8,

-OBP16, -OG16, -OV8, -OV16, -OVP16, -OW4, -OW8, ­OW16, -OX8

Combination Input/Output Module Catalog Numbers:
1746-IO4, -IO8, -IO12, -IO12DC

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Important User Information

Because of the variety of uses for th e products described in this publication, those
responsible for the application and use of this control equipment must satisfy
themselves that all necessary steps have been taken to assure that each
application and use meets all performance and safety requirements, including any
applicable laws, regulations, codes and standards.

The illustrations, charts, sample programs and layout examples shown in this
guide are intended solely for purposes of example. Since there are many
variables and requirements associated with any particular installation, Allen­Bradley does not assume resp onsibility or liability (to in clude intellectual
property liability) for actual use based upon the examples shown in this
publication.

Allen-Bradley publication SGI-1.1, Safety Guidelines for the Application,
Installation, and M ain tenance of Solid-State Control (available from your local
Allen-Bradley office), describes some important differences between solid-state
equipment and electromechanical devices that should be taken into consideration
when applying products such as those described in this publication.

Reproduction of the cont ent s of t his copy ri ghted pub licati on , in whol e or in part ,
without written permission of A llen-Bradley Company, Inc., is prohibited.

Throughout these installation instructions we use notes to make you aware of
safety considerations:

ATTENTION: Identifies information about practices or
circumstances that can lead to personal injury or death, property

!

Attention statements hel p you to:

• identify a hazard

• avoid the hazard

• recognize the consequences

IMPORTANT : Identifies information that is critical for successful ap plication and

damage or economic loss.

understanding of the product.

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Discrete I/O Modules 3

Table of Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Hazardous Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Environnements Dangereux. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

General I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Heat Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Input Modules - ac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Input Modules - dc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Output Modules - ac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Output Modules - dc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Relay Contact Output Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Relay Contact Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Input/Output Combination Modules . . . . . . . . . . . . . . . . . . . . . . . .26

Octal Label Kit Installation (for PLC Processors Only) . . . . . . . . . . . . .27

Applying the Octal Filter Label . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Applying the Octal Door Label . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Removable Terminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Fuse Protection and Blown Fuse Diagnostics . . . . . . . . . . . . . . . . . . . .29

Fuse Protection (1746-OBP16 and 1746-OVP16) . . . . . . . . . . . . .29

Fuse Protection (1746-OAP12) . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Blown Fuse Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Processor Operation in Case of Blown Fuse - Processor Continues .

32

Processor Operation in Case of Blown Fuse - Processor Faults . .32
Recovery From Blown Fuse/Processor Fault/Processor Shutdown 34

Replacement Fuse Recommendations . . . . . . . . . . . . . . . . . . . . . .34

Fuse Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Electronically Protected Modules (1746-OB6EI and -OB16E) . . . . . . .36

Electronic Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Auto Reset Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Short Circuit/Overload Current Diagnostics . . . . . . . . . . . . . . . . . .37

Recovery From Channel Shutdown . . . . . . . . . . . . . . . . . . . . . . . .37

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Labeling for SLC/PLC

Input Modules - ac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Input Modules - dc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Output Modules - ac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Relay Contact Output Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

®

Systems . . . . . . . . . . . . . . . . . . . . . . . . . .38

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Input/Output Combination Modules . . . . . . . . . . . . . . . . . . . . . . . .50

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Discrete I/O Modules 5

Overview

In addition to providing the module’s electrical specifications, this document tells
you how to:

• install the module into a chassis

• wire the module’s terminal block

• install the Octal Filter Label

Hazardous Location Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only. The following WARNING statement applies to
use in hazardous locations.

WARNING: EXPLOSION HAZARD

• Substitution of components may impair suitability for Class I,
Division 2.

• Do not replace components or disconnect equipment unless
power has been switched off or the area is known to be non­hazardous.

• Do not connect or disconnect components unless power has
been switched off or the area is known to be non-hazardous.

• All wiring must comply with N.E.C. article 501-4(b).

Environnements Dangereux

Cet équipement est conçu pour être utilis é dan s d e s environnements de Classe I,
Division 2, Groupes A, B, C, D ou non dangereux. La mise en garde suivante
s’applique à une utilisation dans des environnements dangereux.

AVERTISSEMENT: DANGER D’EXPLOSION

• La substitution de com posants peut rendre cet équipement
impropre à une utilisation en environnemen t de Classe I,
Division 2.

• Ne pas remplacer de composants ou déconnecter
l'équipement sans s'être assuré que l'alimentation est coupée.

• Ne pas connecter ou déconnecter des composants sans s'être
assuré que l'alimentation est coupée.

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6 Discrete I/O Module s

Installation

ATTENTION: Never install, remove, or wire modules with
power applied to chassis.

!

IMPORTANT : The first slot of the chassis is reserved for the processor or the

1747-ASB module.

1. Disconnect power.

2. Align circuit board of
module with chassis card
guide. (A)

3. Slide the module into the
chassis until the bottom tabs
lock into place. (B)

4. Route the wires down and
away from the module,
securing them with the wire
tie. (C)

5. To keep the chassis free
from debris, cover all
unused slots with Card Slot
Filler , catalog n umber 174 6­N2.

To remove the module,
press and hold the module
release located on each self­locking tab, and slide the
module out of the chassis
slot. (D)

Slot 1

max. #14 AWG (2 mm
max. 2 wires per terminal
max. torque: 0.9 Nm (8
in-lbs)

2

C

B

D

A

)

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Discrete I/O Modules 7

Specifications

General I/O

Table 1: Specifications for All Discrete Modules

Operating Temperature 0°C to 60°C (32°F to 140°F)

(1)

Storage Te mperature -40°C to 85°C (-40°F to 185°F)
Operating Humidity 5% to 95% (noncondensing)
Noise Immunity NEMA standard ICS 2-230

Displacement 0.015 in peak at 5 to 57 Hz

Vibration (Operating)

Acceleration 2.5Gs at 57 to 2000 Hz
30Gs (all modules except relay contact)

Shock (Operating)

10Gs (relay contact modules: -OW, -OX, and
combination I/O modules)

Isolation

(2)

1500V

• UL listed

• CSA certified or C-UL approved as indicated

Agency Certification

by product marking

• CE compliant for all applicable directives
when product or packaging is marked

Hazardous Environment
Class

(3)

Class I, Division 2 Hazardous Environment
UL-A196, CSA, C-UL

(1)Exceptions are indicated with certain modules.
(2)Electro-optical isolation between I/O terminals and control logic.
(3)Some modules are classified Class 1, Division 2 by CSA only or C-UL only as shown in

the specification table for the respective module.

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8 Discrete I/O Module s

Heat Dissipation

The following tables contain values for the heat dissipated by each I/O module.

Use them to calculate the total amount of heat diss ipated by your SLC 500™
control system. For details on how to calculate total heat dissipation, refer to the
SLC 500 Modular Hardware Style Installation and Operation Manual,
publication 174 7-6 .2. Pl eas e note th e fol lo wing definitions:

• Watts per Point - the heat dissipation that can occur in each field wiring
point when energized at nominal voltage.

• Minimum Watts - the amount of heat dissipation that can occur when there
is no field power present.

• Total Watts - the watts per point multiplied by the number of points, plus the
minimum watts (with all points energized).

Table 2: Input Module Heat Dissipation

Catalog Numbers Watts per Point Minimum Watts Total Watts

1747-IA4 0.27 0.175 1.30
1746-IA8 0.27 0.250 2.40

1746-IA16 0.27 0.425 4.80

1746-IB8 0.20 0.250 1.90

1746-IB16 0.20 0.425 3.60
1746-IC16 0.22 0.425 3.95
1746-IG16 0.02 0.700 1.00
1746-IH16 0.32 0.217 5.17

1746-IM4 0.35 0.175 1.60
1746-IM8 0.35 0.250 3.10

1746-IM16 0.35 0.425 6.00

1746-IN16 0.35 0.425 6.00
1746-ITB16 0.20 0.425 3.60
1746-ITV16 0.20 0.425 3.60

1746-IV8 0.20 0.250 1.90

1746-IV16 0.20 0.425 3.60

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Discrete I/O Modules 9

Table 3: Output Module Heat Dissipation

Catalog Numbers Watts per Point Minimum Watts Total Watts

1746-OA8 1.000 0.925 9.00

1746-OA16 0.462 1.850 9.30

1746-OAP12 1.000 1.850 10.85

1746-OB6EI 0.440 0.230 2.90

1746-OB8 0.775 0.675 6.90

1746-OB16 0.388 1.400 7.60

1746-OB16E 0.150 0.675 3.07

1746-OBP8 0.300 0.675 3.08

1746-OBP16 0.310 1.250 6.26

1746-OG16 0.033 0.900 1.50

1746-OV8 0.775 0.675 6.90

1746-OV16 0.388 1.400 7.60

1746-OVP16 0.310 1.250 6.26

1746-OW4 0.133 1.310 1.90
1746-OW8 0.138 2.590 3.70

1746-OW16 0.033 5.170 5.70

1746-OX8 0.825 2.590 8.60

Table 4: Combination Input/Output Module Heat Dissipation

Catalog Numbers Watts per Point Minimum Watts Total Watts

0.27 per input point

1746-IO4

0.75 1.60

0.133 per outp ut poi nt

0.27 per input point

1746-IO8

1.38 3.00

0.133 per outp ut poi nt

1746-IO12

1746-IO12DC

0.27 per input point

2.13 4.60

0.133 per outp ut poi nt

0.20 per input point

1.84 3.90

0.133 per outp ut poi nt

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10 Dis cre te I/ O Mod ule s

Input Modules - ac

Table 5: Specifications for Input Modules 1746-IA4, -IA8, and -IA16

Catalog Number 1746-

Specification

IA4 IA8 IA16

Voltage Category 100/120V ac Signal Input
Number of Inputs 4816
Points per Common 4816
Operating Voltage 85 to 132V ac at 47 to 63 Hz

(1)

Backplane Current
Consumption

Signal Delay (max.)

5V dc 0.035A 0.050A 0.085A
24V dc 0.0A

on = 35 ms
off = 45 ms

Off State Voltage (max.) 30V ac
Off State Current (max.) 2 mA
Nominal Input Current at 120V

ac
Inrush Current (max.)

(2)

Inrush Current Time Duration
(max.)

(1)Removable Terminal Block.
(2)An ac input device must be compatible with SLC 500 input circuit inrush current. A

current limiting resistor can be used to limit inrush current; however, the operating
characteristics of the ac incircuit will be affected.

12 mA

0.8A

0.5 ms

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Table 6: Specifications for Input Modules 1746-IM4, -IM8, and -IM16

Catalog Number 1746-

Specification

IM4 IM8 IM16

Voltage Category 200/240V ac Signal Input
Number of Inputs 4816
Points per Common 4816
Operating Voltage 170 to 265V ac at 47 to 63 Hz

(1)

Backplane Current
Consumption

Signal Delay (max.)

5V dc 0.035A 0.050A 0.085A
24V dc 0.0A

on = 35 ms
off = 45 ms

Off State Voltage (max.) 50V ac
Off State Current (max.) 2 mA
Nominal Input Current at 240V ac 12 mA
Inrush Current (max.)
Inrush Current Time Duration

(max.)

(1)Removable Terminal Block.
(2)An ac input device must be compatible with SLC 500 input circuit inrush current. A current

limiting resistor can be used to limit inrush current; however, the operating characteristics
of the ac input circuit will be affected.

(2)

1.6A

0.5 ms

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12 Dis cre te I/ O Mod ule s

Input Modules - dc

Table 7: Specifications for Input Modules 1746-IB8, -IB16, -ITB16, and -IC16

Catalog Number 1746-

Specification

IB8 IB16

Voltage Category 24V dc Signal Input (sinking)

Number of Inputs 816 16 16
Points per Common 816 16 16

Operating Voltage 10 to 30V dc (sinking)

(1)

ITB16

(1)

IC16

48V dc

Signal Input

(sinking)

30 to 60V dc at 55°C
30 to 55V dc at 60°C

(sinking)

(1)(2)

Backplane

5V dc 0.050A

Current
Consumptio
n

Signal Delay (max.)

Off State Voltage
(max.)

Off State Current
(max.)

Nominal Input
Current

(1)Removable Terminal Block.
(2)Use ID Code 0509 when configuring your system with programming software or the HHT.
(3)Typical signal delay for these modules: ON = 0.1 ms, OFF = 0.25 ms at 24V dc.

24V dc 0.0A

on = 8

ms

off = 8 ms

on = 8

ms

off = 8 ms

on = 0.3 ms

off = 0.5

(3)

ms

5.0V dc 10.0V dc

1 mA 1 mA 1.5 mA 1.5 mA

8 mA at 24V dc 4.1 mA at 48V dc

on = 4 ms
off = 4 ms

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Discrete I/O Modules 13

Table 8: Specifications for Input Modules 1746-IV8, -IV16, and -ITV16

Catalog Number 1746-

Specification

IV8 IV16

Voltage Category 24V dc Signal Input (sourcing)
Number of Inputs 81616
Points per Common 81616
Operating Voltage 10 to 30V dc (sourcing)

(1)

ITV16

(1)

Backplane Current
Consumption

Signal Delay (max.)

5V dc 0.050A 0.085A 0.085A
24V dc 0.0A

on = 8 ms
off = 8 ms

on = 8 ms
off = 8 ms

on = 0.3 ms

off = 0.5 ms

Off State Voltage (max.) 5.0V dc
Off State Current (max.) 1 mA 1 mA 1.5 mA
Nominal Input Current at

24V dc

(1)Removable Terminal Block.
(2)Typical signal delay for these modules: ON = 0.1 ms, OFF = 0.25 ms at 24V dc.

8 mA

(2)

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14 Dis cre te I/ O Mod ule s

Table 9: Specifications for Input Module 1746-IG16

Specification 1746-IG16

Voltage Category 5V dc TTL Signal Input (sourcing)
Number of Inputs 16
Points per Common 16

Operating Voltage

Backplane Current
Consumption

Signal Delay (max.)

Off State Voltage (max.)
Off State Current (max.) 4.1 mA
Nominal Input Current at 5V dc 3.7 mA

(1)Removable Terminal Block.

5V dc 0.140A
24V dc 0.0A

4.5 to 5.5V dc (sourcing)

50 mV peak to peak ripple (max.)

on = 0.25 ms
off = 0.50 ms

2.0V dc

(1)

(2)

(2)TTL inputs are inverted (-2.0 to +0.8V dc = low voltage = True = ON). Use a NOT

instruction in your ladder program to convert to traditional True = High logic.

ATTENTION: To avoid potential damage to TTL modules,
handle them by the ends of the module, not metallic surfaces.
Electrostatic discharges can damage the module. Care should be

!

taken to prevent exposure of terminals or components to
electrostatic charges.

Careful wire routing within the enclosure helps cut down electrical noise between
I/O lines. Refer to the SLC 500 Modular Hardware Style Installation and
Operation Manual, publication 1747-6.2, for recommended wiring pro cedures
for TTL modules.

Cable Length - Limit cable length to 15 meters (50 feet) per point for inputs in
standard enviro nments. R efer to Allen-Bradley Pr ogrammable Controller Wiring
and Grounding Guidelines, publication 1770-4.1, for complete information.

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Table 10:Specifications for Input Module 1746-IN16

Specification 1746-IN16

(1)

Voltage Category 24V ac/dc Signal Input
Number of Inputs 16
Points per Common 16

dc 10 to 30V dc (sinking)

Operating Voltage

ac 10 to 30V ac

Backplane Current
Consumption

5V dc 0.085A
24V dc 0.0A

dc

on = 15 ms
off = 15 ms

Signal Delay (max.)

ac

on = 25 ms
off = 25 ms

dc 3.0V dc

Off State Voltage (max.)

ac 3.0V ac
dc 1 mA

Off State Current (max.)

ac 1 mA
dc 8 mA at 24V dc

Nominal Input Current

ac 8 mA at 24V ac

Inrush Current (max.) 0.02A (ac only)

(1)Removable Terminal Block.

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16 Dis cre te I/ O Mod ule s

Table 11:Specifications for Input Module 1746-IH16

Specification 1746-IH16

(1)(2)(3)

Voltage Category 125V dc Signal Input (sinking
Number of Inputs 16
Points per common 16

Range:

• 90 to 146V dc

Operating Voltage

Max. Points O N Simult aneo usly :

• 16 at 146V dc and 30°C

• 12 at 146V dc and 50°C

• 14 at 132V dc and 55°C

• 16 at 125V dc and 60°C

Backplane

5V dc 0.085A

Current
Consumption

Signal Delay (max.)

24V dc 0.0A

on = 9 ms
off = 9 ms

Off State Voltage (max.) 20 .0V dc
Off State Current (max.) 0.8mA

Nominal Input Current

2.15 mA at 125V dc

2.25 mA at 132V dc

(1)Removable Terminal Block.
(2)Use ID Code 0507 when configuring your system with programming software or the HHT.
(3)If the input module is connected in parallel with an inductive load, use surge suppression

across the load to protect the input module from damage caused by reverse voltage.
Refer to the
publication 1747-6.2, for more information on surge suppression.

SLC 500 Modular Hardware Style Installation and Operation Manual

,

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Discrete I/O Modules 17

Output Modules - ac

Table 12:Specifications for Output Modules 1746-OA8, -OA16, and -OAP12

Catalog Number 1746-

Specification

OA8 OA16

(1)

OAP12

(1)(2)(3)

(4)

Voltage Category 120/240V ac Signal Input
Number of Outputs 81612
Points per Common 486
Operating Voltage 85 to 265V ac at 47 to 63 Hz

Backplane Current
Consumption

Max. Signal Delay, Resistive

(5)

Load
Off State Leakage (max.)

5V dc 0.185A 0.370A 0.370A
24V dc 0.0A

on = 1 ms, off = 11.0 ms

(6)

2 mA

Load Current (min.) 10 mA

Continuous Current per

(7)

Point

1.0A at 30°C

0.50A at 60°C

0.50A at 30°C

0.25A at 60°C

2.0A at 30°C

1.25A at 55°C

1.0A at 60°C

Continuous Current
per Module (max.)

8.0A at 30°C

4.0A at 60°C

On State Voltage Drop (max.) 1.50V at 1.0A
Surge Current per Point

(8)

10.0A for 25 ms10.0A for 25

(max.)

(1)Removable Terminal Block.
(2)A fused common and blown fuse LED are provided on this module. See “Fuse Protection

and Blown Fuse Diagnostics” on page 32.
(3)Use ID Code 2803 when configuring your system with programming software or the HHT.
(4)Certified for Class 1, Division 2 hazardous location by CSA.
(5)Triac outputs turn on at any point in the ac line cycle, and turn off at ac line zero cross.
(6)To limit the effects of leakage current through solid state outputs, a loading resistor can

be connected in parallel with your load. For 120V ac operation, use a 15K

For 240V ac operation, use a

15K Ω, 5W resistor.

8.0A at 30°C

4.0A at 60°C

1.50V at

0.50A

ms

9.0A at 30°C

6.0A at 60°C

1.2V at 2.0A

17.0A for 25

(9)

ms

Ω,

2W resistor.

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