1756-RIO Product datasheet   

1756-RIO Functional Description

The Allen-Bradley 1756-RIO Remote I/O module connects a ControlLogix processor to a Remote I/O (RIO) network, acting as an adapter or scanner. It efficiently handles block transfer (BT), digital, specialty, and analog data without needing message instructions, ensuring seamless data communication between the controller and remote I/O adapters. Part of the 1756 ControlLogix Communication Module Series, the Allen-Bradley 1756-RIO Remote I/O module is shipped in scanner mode by default and supports up to 32 physical adapters. It is versatile, accommodating all remote I/O baud rates and partial rack combinations.

As a scanner, the Allen-Bradley 1756-RIO Remote I/O module regularly updates block transfers at all locations. When used as an adapter, it allows the controller to communicate with a pre-existing system scanner. This module requires a 1756 chassis power supply and provides continuous isolation of 50V, with basic insulation between RIO communication lines and the backplane. For optimal installation, power to the chassis should be turned off to prevent electrical arcing.

The Allen-Bradley 1756-RIO Remote I/O module is designed for installation in any slot of a ControlLogix chassis, supporting a wide range of chassis models such as 1756-A4, 1756-A7, 1756-A10, and more. It supports simplex and redundant controller topologies and is compatible with various power supplies, including the 1756-PA72/C and 1756-PB75/B, among others. Furthermore, it can interface with Human Machine Interface (HMI) systems and SCADA systems via Allen-Bradley communication cards.

The Allen-Bradley 1756-RIO Remote I/O module can handle up to 10 scheduled I/O connections and draws 450 mA at 5.1V DC and 5 mA at 24V DC. It dissipates 2.5 Watts of power and generates 8.5 BTU/hr of thermal dissipation, making it a reliable and efficient choice for complex networked control systems. The physical cable used to establish RIO connections is the 1771-CD or Belden 9463 (Blue Hose) cable.