I/O Modules
1756 ControlLogix I/O ModulesThe ControlLogix architecture provides a wide range of input and output modules to span many applications, from high-speed digital to process control. The ControlLogix architecture uses Producer-Consumer technology, which allows input information and output status to be shared among multiple ControlLogix controllers.
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Each ControlLogix I/O module mounts in a ControlLogix chassis and requires either a removable terminal block (RTB) or a 1492 interface module (IFM) to connect all field-side wiring. RTBs and IFMs are not included with the I/O modules. They must be ordered separately.
Environmentals and Certifications
ControlLogix I/O Modules Environmental Specifications
| ControlLogix I/O Modules | |
| Operating temperature |
0…60 °C (32…140 °F) |
| Storage temperature |
-40…85 °C (-40…185 °F) |
| Relative humidity |
5…95% noncondensing |
| Vibration |
2 g at 10…500 Hz |
| Operating shock |
30 g |
| Nonoperating shock |
50 g |
ControlLogix I/O Modules Certifications
Certifications: c-UL-us, CE, CSA, C-Tick, FM, ATEX, TÜV.
When product is marked. See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates, and other certification details. For TÜV and SIL certification details, see the Safety Certifications and SIL link.
Digital I/O Modules
The 1756 digital I/O modules support these features.
- Variety of voltage interface capabilities
- Isolated and nonisolated module types
- Point-level output fault states
- Direct-connect or rack-optimized communication
- Field-side diagnostics on select modules
In addition, you can select these types of digital I/O modules.
| Digital I/O Type | Description |
| Diagnostic | These modules provide diagnostic features to the point level. These modules have a D at the end of the catalog number. |
| Electronic fusing | These modules have internal electronic fusing to prevent too much current from flowing through the module. These modules have an E at the end of the catalog number. |
| Individually isolated | These modules have individually isolated inputs or outputs. These modules have an I at the end of the catalog number. |
Digital AC Input Modules
Specifications [PDF]
| Cat. No. | Inputs/Outputs | Voltage Category | Operating Voltage Range | Removable Terminal Block |
| 1756-IA8D | 8 diagnostic inputs (4 points/group) | 120V AC | 79…132V AC | 1756-TBNH 1756-TBSH |
| 1756-IA16 | 16 inputs (8 points/group) | 120V AC | 74…132V AC | 1756-TBNH 1756-TBSH |
| 1756-IA16I | 16 individually isolated inputs | 120V AC | 74…132V AC | 1756-TBCH 1756-TBS6H |
| 1756-IA32 | 32 diagnostic inputs (4 points/group) | 120V AC | 74…132V AC | 1756-TBCH 1756-TBS6H |
| 1756-IM16I | 16 individually isolated inputs | 240V AC | 159…265V AC | 1756-TBCH 1756-TBS6H |
| 1756-IN16 | 16 inputs (8 points/group) | 24V AC | 10…30V AC | 1756-TBNH 1756-TBSH |
Digital AC Output Modules
Specifications [PDF]
| Cat. No. | Inputs/Outputs | Voltage Category | Operating Voltage Range | Removable Terminal Block |
| 1756-OA8 | 8 outputs (4 points/group) | 120/240V AC | 79…265V AC | 1756-TBNH 1756-TBSH |
| 1756-OA8D | 8 diagnostic, electronically fused outputs (4 points/group) | 120V AC | 74…132V AC | 1756-TBNH 1756-TBSH |
| 1756-OA8E | 8 electronically fused outputs (4 points/group) | 120V AC | 74…132V AC | 1756-TBNH 1756-TBSH |
| 1756-OA16 | 16 mechanically fused/group outputs (8 points/group) | 120/240V AC | 74…265V AC | 1756-TBNH 1756-TBSH |
| 1756-OA16I | 16 individually isolated outputs | 120/240V AC | 74…265V AC | 1756-TBCH 1756-TBS6H |
| 1756-ON8 | 8 outputs (4 points/group) | 24V AC | 10…30V AC, current >50 mA 16…30V AC, current <50 mA |
1756-TBNH 1756-TBSH |
Digital DC Input Modules
Specifications [PDF]
| Cat. No. | Inputs/Outputs | Voltage Category | Operating Voltage Range | Removable Terminal Block |
| 1756-IB16 | 16 inputs (8 points/group) | 12/24V DC sink | 10...31.2V DC | 1756-TBNH 1756-TBSH |
| 1756-IB16D | 16 diagnostic inputs (4 points/group) | 12/24V DC sink | 10...30V DC | 1756-TBCH 1756-TBS6H |
| 1756-IB16I | 16 individually isolated inputs | 12/24V DC sink/source | 10...30V DC | 1756-TBCH 1756-TBS6H |
| 1756-IB16ISOE | 16 individually isolated, sequence of events inputs | 24/48V DC sink/source | 10...55V DC | 1756-TBCH 1756-TBS6H |
| 1756-IC16 | 16 inputs (8 points/group) | 48V DC sink | 30...55V DC @ 60 °C 30...60V DC @ 55 °C |
1756-TBNH 1756-TBSH |
| 1756-IG16 | 16 inputs (8 points/group) | 5V DC TTL source (Low=True) | 4.5...5.5V DC | 1756-TBNH 1756-TBSH |
| 1756-IH16I | 16 individually isolated inputs | 125V DC sink/source | 90...146V DC | 1756-TBCH 1756-TBS6H |
| 1756-IH16ISOE | 16 individually isolated, sequence of events inputs | 125V DC sink/source | 90...140V DC | 1756-TBCH 1756-TBS6H |
| 1756-IV16 | 16 inputs (8 points/group) | 12/24V DC source | 10...30V DC | 1756-TBNH 1756-TBSH |
| 1756-IV32 | 32 inputs (16 points/group) | 12/24V DC source | 10...30V DC | 1756-TBCH 1756-TBS6H |
Digital DC Output Modules
Specifications [PDF]
| Cat. No. | Inputs/Outputs | Voltage Category | Operating Voltage Range | Removable Terminal Block |
| 1756-OB8 | 8 outputs | 12/24V DC source | 10...30V DC | 1756-TBNH 1756-TBSN |
| 1756-OB8EI | 8 electronically fused, individually isolated outputs | 12/24V DC source | 10...30V DC | 1756-TBCH 1756-TBS6H |
| 1756-OB8I | 8 individually isolated outputs | 12/24V DC source | 10...30V DC | 1756-TBCH 1756-TBS6H |
| 1756-OB16D | 16 diagnostic outputs (8 points/group) | 24V DC source | 19.2...30V DC | 1756-TBCH 1756-TBS6H |
| 1756-OB16E | 16 electronically fused outputs (8 points/group) | 12/24V DC source | 10...31.2V DC | 1756-TBNH 1756-TBSH |
| 1756-OB16I | 16 individually isolated outputs | 12/24V DC sink/source | 10...30V DC | 1756-TBCH 1756-TBS6H |
| 1756-OB16IS | 16 individually isolated outputs 8 scheduled outputs |
12/24V DC sink/source | 10...30V DC | 1756-TBCH 1756-TBS6H |
| 1756-OB32 | 32 outputs (16 points/group) | 12/24V DC source | 10...31.2V DC | 1756-TBCH 1756-TBS6H |
| 1756-OC8 | 8 outputs (4 points/group) | 48V DC source | 30...60V DC | 1756-TBNH 1756-TBSH |
| 1756-OG16 | 16 outputs (8 points/group) | 5V DC TTL Source (Low=True) | 4.5...5.5V DC | 1756-TBNH 1756-TBSH |
| 1756-OH8I | 8 individually isolated outputs | 120V DC | 90…146V DC | 1756-TBCH 1756-TBS6H |
| 1756-OV16E | 16 electronically fused outputs (8 points/group) | 12/24V DC sink | 10...30V DC | 1756-TBNH 1756-TBSH |
| 1756-OV32E | 32 electronically fused outputs (16 points/group) | 12/24V DC sink | 10...30V DC | 1756-TBCH 1756-TBS6H |
Contact Output Modules
Specifications [PDF]
| Cat. No. | Inputs/Outputs | Operating Voltage Range | Removable Terminal Block |
| 1756-OW16I | 16 N.O. individually isolated outputs | 5...150V DC 10...265V AC |
1756-TBCH 1756-TBS6H |
| 1756-OX8I | 8 N.O. 8 N.C. individually isolated outputs (2 points/group) |
5...150V DC 10...265V AC |
1756-TBCH 1756-TBS6H |
Analog I/O Modules
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The 1756 analog I/O modules support these features.
- On-board data alarming
- Scaling to engineering units
- Real-time channel sampling
- Data Format: Integer mode (left justified, 2s complement) IEEE 32-bit floating point
- Module conversion method: Sigma-Delta
- Module keying: Electronic software configurable
- RTB keying: User-defined mechanical
Analog Input Modules
Specifications [PDF]
| Cat. No. | Inputs/Outputs | Range | Resolution | Removable Terminal Block |
| 1756-IF6CIS | 6 individually isolated inputs, current sourcing | 0…21 mA | 16 bits 0.34 mA/bit |
1756-TBNH 1756-TBSH |
| 1756-IF6I | 6 individually isolated inputs | ±10.5V 0…10.5V 0…5.25V 0…21 mA |
16 bits 10.5V: 343 mV/bit 0…10.5V: 171 mV/bit 0…5.25V: 86 mV/bit 0…21 mA: 0.34 mA/bit |
1756-TBNH 1756-TBSH |
| 1756-IF8 | 8 single-ended inputs 4 differential inputs 2 high-speed differential inputs |
±10.25V 0...10.25V 0...5.125V 0…20.5 mA |
±10.25V: 320 mV/cnt (15 bits + sign bipolar) 0…10.25V: 160 mV/cnt (16 bits) 0…5.125V: 80 mV/cnt (16 bits) 0…20.5 mA: 0.32 mA/cnt (16 bits) |
1756-TBCH 1756-TBS6H |
| 1756-IF8H | 8 differential voltage or current inputs, HART interface | ±10V 0...5V 1…5V 0...10V 0…20 mA 4…20 mA |
16…21 bits | 1756-TBCH 1756-TBS6H |
| 1756-IF16 | 16 single-ended inputs 8 differential or 4 differential (high speed) inputs |
±10.5V 0…10.5V 0…5.25V 0…21 mA |
16 bits 10.5V: 343 mV/bit 0…10.5V: 171 mV/bit 0…5.25V: 86 mV/bit 0…21 mA: 0.34 mA/bit |
1756-TBCH 1756-TBS6H |
Analog RTD and Thermocouple Modules
Specifications [PDF]
| Cat. No. | Inputs/Outputs | Range | Resolution | Removable Terminal Block |
| 1756-IR6I | 6 individually isolated RTD inputs | 1…487 W 2…1000 W 4…2000 W 8…4020 W |
16 bits 1…487 W: 7.7 mW/bit 2…1000 W: 15 mW/bit 4…2000 W: 30 mW/bit 8…4020 W: 60 mW/bit |
1756-TBNH 1756-TBSH |
| 1756-IT6I | 6 individually isolated thermocouple inputs 1 CJC |
-12…78 mV -12…30 mV |
16 bits -12...78 mV: 1.4 mV/bit -12...30 mV: 0.7 mV/bit |
1756-TBNH 1756-TBSH |
| 1756-IT6I2 | 6 individually isolated thermocouple inputs 2 CJC |
-12…78 mV (1.4 mV per bit) -12…30 mV (0.7 mV per bit – high resolution range) |
16 bits -12...78 mV: 1.4 Vm/bit -12...30 mV: 0.7 mV/bit |
1756-TBNH 1756-TBSH |
Analog Output Modules
Specifications [PDF]
| Cat. No. | Inputs/Outputs | Range | Resolution | Removable Terminal Block |
| 1756-OF4 | 4 voltage or current outputs | ±10.4V 0…21 mA |
Voltage: 15 bits across 10.5V, 320 mV/bit Current: 15 bits across 21mA, 650 nA/bit |
1756-TBNH 1756-TBSH |
| 1756-OF6CI | 6 individually isolated outputs, current | 0…21 mA | 13 bits across 21 mA (2.7 mA) | 1756-TBNH 1756-TBSH |
| 1756-OF6VI | 6 individually isolated outputs, voltage | ±10.5V | 14 bits across 21V (1.3 mV) (13 bits across 10.5V + sign bit) |
1756-TBNH 1756-TBSH |
| 1756-OF8 | 8 voltage or current outputs | ±10.4V 0…21 mA |
15 bits across 21 mA - 650 nA/bit 15 bits across 10.4V - 320 mV/bit |
1756-TBNH 1756-TBSH |
| 1756-OF8H | 8 voltage or current outputs, HART interface | ±10.4V 0…20 mA 4…20 mA |
15…16 bits | 1756-TBNH 1756-TBSH |
Analog Combination Input and Output Module
Specifications [PDF]
| Cat. No. | Inputs/Outputs | Range | Resolution | Removable Terminal Block |
| 1756-IF4FXOF2F | 4 high-speed, sub-millisecond, differential inputs 2 high-speed voltage or current outputs |
Input: ± 10.5V 0…10.5V 0…5.25V 0…21 mA Output: ± 10.4V 0…21 mA |
Input: Approx. 14 bits across ±10V DC (21V total) ±10V: 1.3 mV/bit, 14-bit effective 0…10.5V: 1.3 mV/bit, 13-bit effective 0…5.25V: 1.3 mV/bit, 12-bit effective Approx. 12 bits across 21 mA 0…21 mA: 5.25 mA/bit Output: 13 bits across 21 mA = 2.8 mA/bit 14 bits across 21.8V = 1.3 mV/bit |
1756-TBCH 1756-TBS6H |
Specialty I/O Modules
Specialty I/O modules are available for more application-specific needs.
Specialty I/O Modules
Specifications [PDF]
| Cat. No. | Inputs/Outputs | Description | Removable Terminal Block |
| 1756-CFM | 4 inputs (2 per channel) 2 outputs, current sourcing |
Configurable flow meter module 2 Flowmeter (F) inputs used for all modes 2 Gate inputs used in Totalizer mode for prover/store count |
1756-TBNH 1756-TBSH |
| 1756-HSC | 2 counters, each with 3 inputs (A, B, Z for gate/reset) 4 outputs (2 points/group) |
High-speed counter module 5V operation: 4.5…5.5V DC 12/24V operation: 10…31.2V DC |
1756-TBCH 1756-TBS6H |
| 1756-PLS | Left section: 2 groups of 4 outputs and 4 inputs each Center section: resolver interface and I/O control Right section: 2 groups of 4 outputs and 4 inputs each |
Programmable limit switch module | Requires 3 RTBs: 1756-TBNH or 1756-TBSH |
Accessories—I/O Modules
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Removable Terminal Blocks
Removable terminal blocks (RTBs) provide a flexible interconnection between your plant wiring and 1756 I/O modules. The RTB plugs into the front of the I/O module. The type of module determines which RTB you need. You can choose screw-clamp or spring-clamp RTBs.
RTBs are not shipped with I/O modules. You must order them separately. The standard housing on the front of the wiring arm is not deep enough for 2.5 mm2 (14 AWG) wiring. If you plan to use 2.5 mm2 (14 AWG) wiring, also order the extended housing.
Removable Terminal Blocks
Specifications [PDF]
| Cat. No. | 1756-TBNH | 1756-TBSH | 1756-TBCH | 1756-TBS6H | 1756-TBE |
| Description | 20-position NEMA screw-clamp RTB | 20-pin spring-clamp RTB with standard housing | 36-pin cage-clamp RTB with standard housing | 36-pin spring-clamp RTB with standard housing | Extended depth terminal block housing |
| Screw torque | 0.8…1 N•m 7…9 lb•in |
0.4 N•m 4.4 lb•in |
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| Screwdriver width | 8 mm (5/16 in.) max | ||||
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Wiring Systems
As an alternative to buying RTBs and connecting the wires yourself, you can buy a wiring system of:
- interface modules (IFMs) that provide the output terminal blocks for digital I/O modules. Use the pre-wired cables that match the I/O module to the IFM.
- analog interface modules (AIFMs) that provide the output terminal blocks for analog I/O modules. Use the pre-wired cables that match the I/O module to the AIFM.
- I/O module-ready cables. One end of the cable assembly is an RTB that plugs into the front of the I/O module. The other end has individually color-coded conductors that connect to a standard terminal block.
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For more information, go to the Allen-Bradley Industrial Controls Catalog, Terminal Blocks and Wiring Systems at: www.ab.com/en/epub/catalogs/12768/229240/229268/.
Or to select or configure a wiring system for your I/O module go to: http://raise.rockwellautomation.com/catalog/_0.asp?onKil=http://www.ab.com/raise.
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PanelConnect Modules
A PanelConnect module and its sensor connection system connect sensors directly to I/O modules using convenient pre-built cables and connectors.
The PanelConnect module mounts on the enclosure and creates the correct seal for the entry of the sensor connections. You do not need to seal the opening where the sensor cables enter the enclosure, create custom connectors, or wire to those custom connectors.
For more information, go to the Rockwell Automation Product Directory, Terminal Blocks & Wiring Systems, and select Panel Connection Systems at: www.ab.com/industrialcontrols/products/terminal_blocks_and_wiring/panel_connection_systems/panel_connect_family.html.