ABB Bailey NADS02 Alarm Station | 240x128 Display INFI 90

This network alarm and display station provides operator interface capability for ABB Bailey INFI 90 systems. It displays alarms, process variables, and system status in real time. Therefore, it enables operators to monitor turbine and plant operations effectively.

Physical and Display Specifications

The ABB Bailey NADS02 measures 25.0 cm in length and 18.0 cm in width. Moreover, its station weight equals approximately 1.20 kg for panel mounting. A single 48-pin male connector links this station to the INFI 90 backplane. Additionally, the unit includes a graphical display and integrated alarm indicators.

Parameter	Specification
Brand	ABB Bailey
Full Model	NADS02
Category	Network Alarm and Display Station
Dimensions (L x W x H)	25.0 cm x 18.0 cm x 6.5 cm (9.84″ x 7.09″ x 2.56″)
Station Weight	1.20 kg (2.65 lbs)
Backplane Interface	1 x 48-pin Male Connector (INFI 90 Rack)
Power Supply Input	24 VDC from Backplane (19.2 to 28.8 VDC)
Power Consumption	8 W (Typical)
Display Type	Monochrome LCD (Backlit)
Display Resolution	240 x 128 Pixels (Graphical)
Display Size	14.0 cm x 7.0 cm (5.51″ x 2.76″)
Text Display Capacity	8 Lines x 40 Characters (Maximum)
Graphic Display Capacity	240 x 128 Dot Graphics
Backlight Type	LED (Green/Yellow)
Backlight Life	50,000 Hours (Minimum)
Alarm Indicators	16 Red LEDs (High Priority) + 8 Yellow LEDs (Low Priority)
Audible Alarm	Internal Buzzer (Software Controllable)
Communication Ports	1 x RS-232 (Local Programming) + 1 x RS-485 (Network)
Network Protocol	Bailey PC90
Baud Rate	19200 baud (Fixed for Network)
On-Board Components	1 Microcontroller + 1 LCD Controller + 4 Memory Chips + 2 UARTs + 1 Display Driver + 8 Protection Diodes + 1 Voltage Regulator + 1 Isolation Transformer + 1 Buzzer Driver + 24 LED Drivers
Energy Storage	3 x 470 µF Electrolytic Capacitors (35V) + 3 x 100 µF (16V) + 2 x 10 µF Tantalum (25V)
Isolation Rating	1500 Vrms (Network Port to Logic)
Operating Temperature	0°C to +55°C (32°F to 131°F)
Storage Temperature	-25°C to +85°C (-13°F to 185°F)
Protection Rating	IP54 (Front Panel)
Mounting Type	Panel Mount (Cutout 23.5 cm x 16.5 cm)
Status Indicators	1 Green LED (Power) + 1 Green LED (Network Active) + 1 Red LED (System Fault)

Display and Alarm Features

The ABB Bailey NADS02 features a graphical 240 x 128 pixel LCD display. Specifically, the screen shows process diagrams, alarm texts, and system status clearly. In addition, sixteen high-priority red LEDs alert operators to critical turbine conditions. Moreover, eight low-priority yellow LEDs indicate non-critical warnings and events. Furthermore, an internal buzzer provides audible notification for active alarms. Consequently, operators can respond to plant events quickly and effectively.

Network Communication and Integration

This alarm and display station connects to INFI 90 networks using Bailey PC90 protocol. For instance, the RS-485 port handles network communication at 19200 baud. In addition, the station receives real-time alarm and process data from the system controller. Moreover, the RS-232 port allows local configuration without network disruption. Thus, this station integrates seamlessly into existing INFI 90 installations.

Energy Storage and Operational Stability

This station stores energy using eight onboard capacitors for power filtering. Specifically, three electrolytic capacitors smooth the 24 VDC supply for stable LCD operation. In addition, three capacitors filter power for the backlight and alarm LEDs. Furthermore, two tantalum capacitors provide high-frequency noise suppression for logic circuits. Therefore, the ABB Bailey NADS02 continues operating through brief power interruptions reliably.

Installation and Diagnostic Indicators

Three LED indicators provide operational status at a glance on this station. First, a green Power LED lights when the 24 VDC supply is present. Second, a green Network Active LED flashes during data exchange with the system controller. Third, a red System Fault LED indicates hardware errors or network timeouts. Additionally, the station requires a panel cutout of 23.5 cm by 16.5 cm. Thus, this alarm station fits standard industrial enclosure openings perfectly.