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ABB 1MRS750407-MBG Annunciator Unit
ABB 1MRS750407-MBG Annunciator Unit
Application
The digital annunciator unit is used in a variety of applications requiring supervision of alarm and signalling contacts in power plants, substations and industrial process installations. The alarm unit is also approved for use in off-shore installations and marine applications. Further, the annunciator unit can be used in any application where on/off signals are to be supervised.
The annunciator unit provides immediate fault recognition, fault identification and visual and audible alarm in an abnormal process situation. The annunciator unit also provides a means for subsequent fault analyses, which means that corrective measures can be carried out without delay and full control of the process can be maintained.
The annunciator units can be used either as independent stand-alone units, or they can be connected together via a fibre-optic bus to form complete supervision, event sequence reporting and data acquisition systems. The annunciator unit is a member of SPACOM, the ultimate integrated secondary equipment system for power systems.
Features
• Flexible, field-customizable 16-channel annunciator unit
• Alarm channels activated by normally open or normally closed contact
• Four +16 output relays: two for group realarms, one for an audible device, one for the self-supervision system and an additional sixteen relays for use as field contact follower outputs or group realarm outputs
• Parameter selection and adjustment from front panel or via serial interface
• First-out alarm indication with clear fourdigit display on the front panel • Extensive data communication via the serial interface and the SPA bus
• Sophisticated hardware and software selfsupervision system for maximum operational reliability under the most demanding environmental conditions • Powerful software support for parameterization of the unit via the serial interface • Member of the SPACOM product family, ABB’s Distribution Automation systemt • CE marking according to the EC directive for EMC.
Data communication
The annunciator unit is provided with a serial interface on the rear panel. By means of a bus connection module type SPA-ZC 17/S or SPA-ZC 21/S the unit can be connected to the fibre-optic SPA bus. The bus connection module type SPA-ZC 21/S is powered from the host unit, whereas the bus connection module SPA-ZC 17/S is provided with a built-in power unit, which can be fed from an external secured power source. The unit communicates with higher-level data acquisition and control systems over the SPA bus.
Self-supervision
The annunciator incorporates a sophisticated self-supervision system which increases the availability of the device and the reliability of the system. The self-supervision system continuously monitors the hardware and the software of the unit. The system also supervises the operation of the auxiliary supply module and the level of the electronics' voltages generated by the module.
If a permanent fault is detected, the fault indicator on the front panel is lit, the output relay of the self-supervision system operates and the outputs are blocked.
Auxiliary supply voltage
The auxiliary supply of the relay is obtained from an internal plug-in type power supply module. Two auxiliary power module types are available: type SPGU 240A1 for the supply voltage range 80…265 V ac/dc and type SPGU 48B2 for the supply voltage range 18…80 V dc. The power supply module forms the internal voltages required by the annunciator.
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