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1775-RM

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PERIPHERAL INTERFACE ADAPTER USE W/1775-GA PLC3

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Technical specifications for 1775-RM

Manufacturer	Rockwell Automation
Brand	Allen-Bradley
Product Lifecycle Status*	Discontinued/Obsolete

* The Allen Bradley 1775-RM has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1775-RM units instead of migration.

Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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The 1775-RM is a Peripheral Interface Adapter Module from the industry manufacturer Allen Bradley. This module allows remote communication to the 1775-GA (Peripheral Communication Module) by connecting devices that are RS-232-C compatible to the 1775-GA. Interface devices can be as far as 10,000 cable feet away from the PLC-3 processor and the 1775-RM can be inserted into any I/O slot of a1771 I/O chassis by which it is powered but it does not communicate through its backplane. A twin-axial cable connects the 1775-RM to the peripheral communication module. Up to sixteen of the 1775-RM, each having two local RS-232-C communication channels, can connect to a remote channel on the peripheral communication module. The local RS-232-C communication channels allow communication to other RS-232-C devices such as computers, industrial terminals, modems, data cartridge recorders, and RS-232-C data terminals. Communication with other RS-232-C equipment is also allowed. Communication between connected devices can be achieved through Binary command language; this allows programming between a computer or 1770-T4 terminal and the PLC-3 processor; this can also be achieved LIST function that allows mass storage and tape functions in addition to the PLC-3 system configuration. A third option is GA Basic programming language for operator interactive interface.

The 1775-RM has four LED indicators for troubleshooting: first, a red module fault LED (labeled MOD FLT), which is on when there is a module fault and off when the module is powered off or there is no fault; second, a green Remote channel LED (labeled REM ACT) that shows the communication status between the 1775-RM and the peripheral communication module. This is turned on when communication is active and in progress and off when there is not communication; third, a green RS-232-C channel 0 LED (labeled CH0 ACT), and fourth, a green RS-232-C channel 1 LED (labeled CH1 ACT). The RS-232-C channels’ LEDs is on when there is communication between devices on that particular channel and off when power is off, break conditions transmission from the Rs-232-C device is in progress or there is not adequate communication between both devices. The 1775-RM runs on a backplane current of 1.5A, communicates at the rate of 115.2 kbaud at 5,000 cable feet and 57.6 kbaud at 10,000 cable feet. There is no keying required and it can operate at a temperature of 0 to 60 degrees Celsius and stored at a temperature of -40 to 85 degrees Celsius.