ABB Bailey SER-740 Sequential Event Recorder

The SER-740 functions as a dedicated sequential event recorder for ABB Bailey INFI 90 systems. This ABB unit captures and time-stamps critical process events with exceptional precision. We engineered this module to provide accurate sequence-of-events analysis for troubleshooting and compliance.

Technical Specifications and Design Features

This event recorder module weighs approximately 0.62 kilograms. Its dimensions measure 280 millimeters in height, 35 millimeters in width, and 280 millimeters in depth. The unit features a rugged metal housing with integrated edge connectors for backplane installation.

Parameter	Specification
Manufacturer	ABB
Model	SER-740
Category	Sequential Event Recorder Module
Product Line	Bailey INFI 90
Input Channels	32 discrete inputs
Time-Stamp Resolution	1 millisecond
Event Memory	4,096 events
Input Voltage	24V DC or 48V DC
Input Filtering	Programmable (1-100 ms)
Communication	Module Bus
Power Supply	5V DC from backplane
Power Consumption	3.5 W maximum
Operating Temperature	0°C to 60°C
Dimensions (H x W x D)	280 mm x 35 mm x 280 mm
Weight	0.62 kg

Engineers will appreciate the 1-millisecond time-stamp resolution of the SER-740. This precision captures the exact sequence of alarms, trips, and status changes. Consequently, users can reconstruct critical events with confidence during incident analysis.

Furthermore, the module accommodates 32 discrete input channels for event monitoring. Each channel accepts 24V DC or 48V DC signals from field devices. The SER-740 stores up to 4,096 events in onboard memory before requiring data retrieval.

Event Capture and Data Management

The SER-740 includes programmable input filtering from 1 to 100 milliseconds. This filtering eliminates nuisance events caused by contact bounce or electrical noise. Users can configure filter settings to match specific field device characteristics.

The module stores each event with a precise time-stamp and channel identifier. This data includes change-of-state information for both rising and falling edges. Engineers can retrieve event logs through the system operator interface or diagnostic tools.

System Integration and Architecture

You can install this event recorder module in any INFI 90 rack system. The SER-740 communicates with the system master through the Module Bus. This integration allows seamless event data transfer to operator workstations.

The module operates from 5V DC power supplied through the backplane. It consumes only 3.5 watts during normal operation. For reference, other Bailey INFI 90 sequence-of-events components share this same form factor and installation method.

Diagnostics and Operational Reliability

The SER-740 includes comprehensive diagnostic features for system verification. Status LEDs indicate power, communication activity, and event buffer status. The module performs continuous self-checks to ensure accurate time-stamping. These diagnostics simplify troubleshooting and maintain data integrity.