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MBAS 9700
MINILEC offers its unique alarm Annunciator based on the latest single chip micro-controller technology with serial communication facility. Available in 19” rack type enclosure. MBAS 9700 annunciators have split architecture for 24, 32, 48, 64, 80, 96,112 & 128 windows. 24, 32, 48, 64, 80, 96,112, & 128 window models are housed in 19” rack type enclosures, separate for MCU and for PSU. Here choice of facia (DFU) is of 3 types (a) Small size i.e. 30 x 30 mm and (b) Big size is 30 x 65 mm (c) 50 x 70 mm. Facia is available in multiples of 16 windows. In addition to all other standard features, MBAS 9700 has additional facility of computer linking. A serial port (RS232/RS485) output is available which can be supported by an IBM compatible PC of minimum 386 configurations. Minilec can supply the standard software with every model or can develop suitable software as per customer requirements or can provide source coding / protocol details to enable client to develop their own suitable software.

Standard Features
Single chip micro-controller logic.
Super bright LED's for window illumination.
Site selectable NO/NC type fault contacts.
Site selectable trip /Non trip (Grouping).
Easy card replacement & hence fault diagnosis.
Switch Mode Power Supply. (Suitable for Both AC/DC Supply)
High noise immunity and wide input supply variation.
Opto-isolated Inputs and Outputs.
Site Selectable sequences.
Potential free dry input contacts.
Two different window sizes.
Replaceable windows & window legends.
Computer linking for fault logging with printer facility for report. Self-surveillance watch dog LED.
Relay output for external audible hooter
Diagnostics Menu
Redundant Power Supply (Only in 19” Rack Model)
CPU fail & PSU fail indication with relay output contact (Only in 19” Rack)
User Friendly terminal Connectors

Optional Features
Different colored LED's in each window for easy differentiation of critical faults.
Customized preprogrammed operating sequence.
Multi channel serial communication (8 Annunciators & single computer)

Constructional Details

MBAS 9700 consist of four basic sections
The Power Supply Unit (PSU Module).
The Main Control Unit (CPU + IOU Module).
The Display Facia Unit (DFU Module).
Computer interface.

The Main Control Unit (MCU)
CPU module is the Main Processing Unit of MBAS 9700 which scans and processes the incoming fault signals from the various potential free field contacts through IOU module, and drives the corresponding LED windows and the audible device in order to annunciate the fault through IOU module. The IOU module is the input & output interfacing unit. To each IOU module 16 input contacts (potential free) & 16 window LED's can be connected.

The Power Supply Unit (PSU)
PSU converts the available power source into a regulated and filtered DC output, which is fed to the MCU Module & DFUs. The power supply can accept Specified AC or DC I/P supply, depending upon the application. Redundant Power supply is available.

The Display Facia Unit (DFU)
The Facia block is accessible from front (in moulded enclosure) and constitutes of window capsules. The sandwiched photo film window inscriptions are press fitted on the window capsules. For 24 to 128 points system the DFUs are given separately.

Supply Voltage : 20-60VDC, 90 - 270VAC/DC

Supply frequency : 50 / 60 Hz. (±3%) for AC

Fault Alarm Inputs.
Fault contacts.
Input interrogation voltage
Input isolation
Response Time
Site selectable DIP for
Fault type
Sequence selection



Actuation Through Fault Contacts
Potential free (volt free) type
+12V DC(ISO)
Opto isolating device.(2 KV)
40 mS.

Trip/Non Trip

Output contacts for grouping
Output contact for CPU & PSU fail
Contact Rating


1NO+ 1NO
5 amp at 240 VAC (Resistive)

No. of windows
Windows dimensions
Flash rates
Power Consumption
: 24/32/40/48/64/80/96/112/128
: 30 mm x 30 mm For small windows
  30 mm x 65 mm For big windows
: Red/Yellow {Amber}/Green/White/Blue
: Fast flash - 50-60 flashes / Min
  Slow flash - 25-30 flashes / Min.
: 1.5 W per Window. (Max)

Sequence : Manual, Auto, Ring back (Optional), Firstup
(Any Other Sequences On Request)

Serial communication : RS232/RS485 (with modbus ASCII/RTU) optional

The MCU unit transmits fault information to computer serially. RS232/RS485 standard is used for serial communication. Communication protocol modbus ASCII / RTU can be offered. In computer user-friendly software is written. This software offers online Date & Time setting, Legend setting, Display window & also it gives fault report with on demand printing facility.

COMPUTER INTERFACE Dimensional Details for Facia
MBAS 9700 MBAS 9700

Dimensional Details - MCU & PSU
MBAS 9700
Dimensional Details -
MCU & PSU for 24 to 64 windows are housed in one 19” rack.

128 POINTS 57.15 465.10 292.38 482.60 260.00 132.50 310.38
112 POINTS 57.15 419.38 292.38 436.88 260.00 132.50 310.38
96 POINTS 57.15 373.66 241.58 391.16 260.00 132.50 259.58
80 POINTS 57.15 327.94 241.58 345.44 260.00 132.50 259.58
64 POINTS 57.15 434.62 -------- 452.12 260.00 132.50 --------
48 POINTS 57.15 388.90 -------- 406.40 260.00 132.50 --------
32 POINTS 57.15 292.38 -------- 309.88 260.00 132.50 --------
24 POINTS 57.15 292.38 -------- 309.88 260.00 132.50 --------

Overall Dimensions (DFU):    
MODELS Big Windows
128 POINT 144m.m. 2304m.m. 70m.m.
112 POINT 144m.m. 2016m.m. 70m.m.
96 POINT 144m.m. 1728m.m. 70m.m.
80 POINT 144m.m. 1440m.m. 70m.m.
64 POINT 144m.m. 1152m.m. 70m.m.
48 POINT 144m.m. 864m.m. 70m.m.
32 POINT 144m.m. 576m.m. 70m.m.
24 POINT 144m.m. 432m.m. 70m.m.
Small Windows
128 POINT 144m.m. 1152m.m. 70m.m.
112 POINT 144m.m. 1008m.m. 70m.m.
96 POINT 144m.m. 864m.m. 70m.m.
80 POINT 144m.m. 720m.m. 70m.m.
64 POINT 144m.m. 576m.m. 70m.m.
48 POINT 144m.m. 432m.m. 70m.m.
32 POINT 144m.m. 288m.m. 70m.m.
24 POINT 144m.m. 216m.m. 70m.m.
  P Q R
Small Window 138mm 138mm 6mm
Big Window 138mm 282mm 6mm

Panel Cutout Details - DFU
MBAS 9700

External Wiring Diagram With Repeat Relay
MBAS 9700

Suitable for Panels in Following Apllications:
Scada Systems
DCS Systems
Plant Automation
Instrumentation Panel

Alarm Annunciators