ABB IISAC01 Harmony Input/Output (I/O) System

ABB IISAC01 Harmony Input/Output (I/O) System

DESCRIPTION

The Harmony Input/Output (I/O) System utilizes a variety of input and output blocks to interface process signals to the Symphony™ Enterprise Management and Control System. Control input/output (CIO) blocks interface field inputs and outputs used in control loop applications. The control I/O block along with other types of blocks for analog and digital I/O interface and remote I/O communication combine to create a complete I/O system (Fig. 1). Refer to the Harmony Input/Output System overview for a complete system description.

The CIO-100 block supports the following control inputs and outputs: 

■ Four analog inputs. 

■ Two analog outputs. 

■ Four digital inputs. 

■ Four digital outputs.

Operation

The CIO-100 block has an onboard microprocessor which controls and performs the following functions for the block: 

■ Hnet communication. 

■ Analog and digital input/output processing. 

■ Station link communication. 

■ Block diagnostics. 

■ Status reporting.

Along with these functions, the microprocessor is also responsible for executing the I/O block portion of the control configuration. The complete control configuration made up of linked function codes resides and is retained in the Harmony controller at all times. The controller only off loads a portion of the configuration to be executed by the individual I/O blocks. Function codes are predefined, fixed function algorithms.

Input/Output

The CIO-100 block supports the following control inputs and outputs: 

■ Four high level analog inputs at 4 to 20 milliamperes or 1 to 5 VDC. 

■ Two high level analog outputs at 4 to 20 milliamperes or 1 to 5 VDC. 

■ Four digital inputs individually selectable for 24, 48, and 125 VDC, and 120 and 240 VAC. 

■ Four 24 VDC open-collector (NPN) digital outputs with a maximum load current of 250 milliamperes.

CIO/Station Control

Normally, the controller and CIO-100 block drive the control output (i.e., analog output). The CIO-100 block provides digitized analog signals representing the process variable to the controller. The operator selects a set point using the set point pushbuttons on the station faceplate. The SAC station sends the set point value to the controller for algorithm processing. The controller generates a control output value based on its algorithm processing. The control output value is sent to the CIO-100 block where it becomes a control output value to a field device.

The station can drive the output signal during one of the following conditions:

■ The controller directs the SAC station to enter bypass mode. 

■ Communication with the controller is lost and the auto bypass option for the station is enabled. This forces the station into bypass mode. 

■ The operator forces the station into manual override mode of operation.

SPECIFICATIONS

Input voltage：110V-380V

Electric current：1A-30A

Power： 5W-130W

Warranty period：1 year

Stock Quantity：30

Place of origin：United States, France, Japan, Viet Nam, Australia, Russia, Germany, Italy, Arabia