ABB Bailey IMASO11 Analog Output Module

ABB IMASO11 is an analog output module widely used in ABB Symphony Plus and Bailey INFI 90 distributed control systems. It provides 4 analog output channels and supports a variety of signal types. Compatible with ABB Symphony Plus and Bailey INFI 90 systems.

The IMASO11 Analog Output (ASO) module outputs fourteen separate analog signals that the INFI 90 OPEN system uses to control a process. It is an interface between the process and the INFI 90 OPEN Strategic Process Management System. Control modules perform the control functions; input/output modules provide the I/O.

This manual explains the purpose, operation and maintenance of the IMASO11 output module. It addresses handling precautions and installation procedures. Figure 1-1 illustrates the INFI 90 OPEN communication levels and the position of the ASO module within these levels.

The ASO module consists of a single printed circuit board (PCB) that occupies one slot in a module mounting unit (MMU). Jumpers on the PCB configure each of the analog outputs. Two captive screws on the faceplate secure the module to the MMU. Two front panel LEDs indicate the module status.

The ASO module has three connection points for external signals and power (P1, P2 and P3). P1 connects to logic power that drives the module circuits (refer to Table 5-2). P2 connects it to the I/O expander bus to communicate with a multifunction processor (MFP) module (refer to Table 5-3). The analog signals are output through connector P3 using a cable connected to a termination unit (TU) or termination module (TM) (refer to Table 5-4). The terminal blocks (physical connection points) for field wiring are on the TU/TM.

The modular design of the ASO, as with all INFI 90 OPEN modules, allows for flexibility when you are creating a process management strategy. It outputs fourteen analog signals that a multifunction processor (MFP) uses to control a process.

The ASO analog outputs are signals of 1 to 5 VDC or 4 to 20 mA. Individual jumpers configure the mode (current or voltage) for each output. This capability allows the INFI 90 OPEN system to match the process requirements.

Each output reads back the signal to the field to insure accurate operation and eliminate the need to calibrate outputs. Additionally, each output is current limited to prevent damage from short circuits. The user can also select one of three default states.

The front panel LED provides a visual indication of the module status to aid in system test and diagnosis. You can remove or install an ASO module without powering the system down.

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