Catalogs > Automation Systems Catalog > I/O > Overview
Overview
In-Cabinet Distributed I/O
Distributed I/O can be mounted In-Cabinet (IP20) requiring an enclosure, or On-Machine™ (IP67) not requiring an additional enclosure for environmental protection and allowing easier maintenance. Both Distributed I/O types are offered in modular and block I/O styles. Modular I/O is a system of interface cards and communications adapters that interface directly to the sensors and actuators of the machine/process and communicate their status to the controller via a communication network. It allows the designer to mix and match I/O interfaces and communications adapters. Block I/O is a complete assembly of sensor and actuator interface points including a network adapter. It may or may not include a power supply and is available in fixed configurations.
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| 1734 POINT I/O | 1794 FLEX I/O | 1797 FLEX Ex I/O | 1790/D/P CompactBlock LDX I/O | 1791D/P/R CompactBlock I/O | 1791DS/ES CompactBlock Guard I/O | 1753 GuardPLC Safety I/O | |
| I/O Types | Digital, Analog, AC/DC, Thermocouple, RTD, Specialty | Digital, Analog, Relay, Thermocouple, RTD | Digital, Analog, Thermocouple, RTD | Digital, Analog, Relay, Thermocouple, RTD | Digital, Analog | Digital 24V dc | Digital, Analog, Relay |
| Module Density | 1 to 8 points per module | 4 to 32 points per module | 4 to 16 points per module | 4 to 32 points per module | 4 to 16 points per module | 8 to 16 points per module | 8 to 28 points per module |
| Specialty Modules | • Encoder • 1 MHz Counter In • Counter In with Outputs • Serial RS232 • RS485 • RS422 • Channel Isolated Thermocouple • RTD • Serial Synchronous Interface (SSI) • Address Reserve |
• HART Analog • Encoder • Counter In • Quadrature Mode • Hi-Res Frequency Monitor • Flow Totalizer Rate Meter • SCANport |
• Hi-Res Frequency Monitor • Flow Totalizer Rate Meter • HART Analog |
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| Network Connectivity | DeviceNet (including SubNet connectivity), ControlNet (Logix controller only), EtherNet/IP (Logix controller only), PROFIBUS DP, OPC/DDE Data Monitoring¬ | DeviceNet, ControlNet, EtherNet/IP, PROFIBUS DP, Universal Remote I/O, other open networks | ControlNet in hazardous area via coax or fiber. By use of bus isolator: DeviceNet, ControlNet, EtherNet/IP, PROFIBUS DP |
DeviceNet, PROFIBUS DP | DeviceNet, Universal Remote I/O, PROFIBUS DP | DeviceNet, EtherNet/IP | GuardPLC Ethernet |
| Environmental Style | Class I, Division 2/Zone 2, Marine Certification, European ATEX Zone 2 3G | IP20, Class I, Division 2/Zone 2, European Zone 2, Marine Certification | Hazardous Areas, Class I, II & III, Division 1, Zone 1, European ATEX Zone 1 & 22 | IP20 | IP20, Class I, Division 2/Zone 2 | IP20, Class I, Division 2/Zone 2 | IP20 |
| Max. Modules per Node | Up to 63 modules | Up to 8 modules | Up to 8 modules | Up to 4 blocks | 2 blocks | 1 Block | 1 block |
| ¬ OPC/DDE Data Monitoring does not require a controller when used in conjunction with RSLinx. For product certification information go to http://www.ab.com/certification. |
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Cables and Cordsets
| Connect to your Allen-Bradley sensors or other field devices with the following cables and cordsets. | |||||||
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| Bulletin 888 Receptacle |
Plus | Bulletin 889 Patchcord |
Plus | Bulletin 898 Distribution Box |
Plus | Bulletin 889 Patchcord or Bulletin 879 Y-Cable |
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| Bulletin 898 Distribution Box |
Plus | Bulletin 889 Patchcord or Bulletin 879 Y-Cable |
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| Bulletin 888 Receptacle | Plus | Bulletin 889 Patchcord | |||||
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| Bulletin 889 Cordset | |||||||
| For additional information on Allen-Bradley wiring and connection systems, go to www.ab.com/io and www.ab.com/sensors. | |||||||