TECHNICAL SPECIFICATIONS

The Allen-Bradley 1756-L61 ControlLogix controller module is suited for usage in most medium-scale applications with the required I/O capacity. Additional modules, such as communication modules, specialist and intelligent modules, and encompass partner modules, may be fitted to improve the module’s functioning.

It has 478 Kb of available Input/Output memory and 2 MB of user memory. A 1784-CF128 CompactFlash memory card may be used to provide 128 MB of additional non-volatile storage capacity as an option. It is a chassis-based controller that may be installed in any open slot on the ControlLogix chassis 1756. This controller is compatible with the following chassis: 1756-A17, 1756-A4, 1756-A10, 1756-A13, and 1756-A7.

It features an open-style enclosure and can support as many as 250 controller connections. Additionally, it includes an integrated RS-232 serial communication port. The DF1 full/half-duplex protocols, DH-485, DF1 radio modem, and ASCII, are all supported by the RS-232 serial port.

The 1756-L61 controller module has 32 controller tasks, each with 100 programs. It supports several communication channels, including ControlNet, Data Highway Plus (DH+), EtherNet/IP, DeviceNet, SynchLink, and external device and process networks.

The 1756-L61 controller module consumes 14 mA @ 24V dc and 1200 mA @ 5V dc. Power dissipation is 3.5 Watts, while thermal dissipation is 11.9 BTU per hour. It also features a constant isolation voltage of 30V that has been tested for 60 seconds at 720V dc.

Its operational temperature range is 0 to 60 °C, and its maximum exterior air temperature tolerance is 60 °C. Its storage temperature range is -40 to 85 °C. While the non-operating shock is 50 G, the operational shock is 30 G. The vibration frequency is 2G between 10 and 500 Hz, and the relative humidity ranges from 5% to 95% (noncondensing).

The implementation of standalone and distributed I/O applications is supported by this controller. The network connections may differ depending on the communication module utilized. Additionally, it provides redundancy, which is generally needed in important systems to increase system availability.

Along with analog input possibilities, including encoder input, LDT input, and SSI input, this controller also features an integrated motion system through the embedded SERCOS (serial real-time communication system) interface. This module may implement motion across an Ethernet/IP network if used in conjunction with an Ethernet communication module.

Relay Ladder Logic (RLL), Structured Text (ST), Function Block Diagram (FBD), and Sequential Function Chart (SFC) are among the programming languages that the controller supports.

An RS-232 communication cable is necessary to communicate with the module. The user software and data are stored in the memory of this module using a battery. The battery versions 1756-BA1, 1756-BATM, and 1756-BATA are suitable for series A controllers, while the 1756-BA2 battery is suitable for series B controllers.