GE B90 User Manual

2-18 B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 2: PRODUCT DESCRIPTION
2
Time delay: 0 to 65535 ms in steps of 1
FLEX STATES
Number: up to 256 logical variables grouped under 16 Modbus addresses
Programmability: any logical variable, contact, or virtual input
NON-VOLATILE LATCHES
Type: set-dominant or reset-dominant
Number: 16 (individually programmed)
Output: stored in non-volatile memory
Execution sequence: as input prior to protection, control, and FlexLogic
USER-PROGRAMMABLE LEDs (Enhanced and standard front panels)
Number: 48 plus trip and alarm
Programmability: from any logical variable, contact, or virtual input
Reset mode: self-reset or latched
LED TEST
Initiation: from any contact input or user-programmable condition
Number of tests: 3, interruptible at any time
Duration of full test: approximately 3 minutes
Test sequence 1: all LEDs on
Test sequence 2: all LEDs off, one LED at a time on for 1 s
Test sequence 3: all LEDs on, one LED at a time off for 1 s
USER-DEFINABLE DISPLAYS (Enhanced and standard front panels)
Number of displays: 16
Lines of display: 2 × 20 alphanumeric characters
Parameters: up to 5, any Modbus register addresses
Invoking and scrolling: keypad, or any user-programmable condition, including pushbuttons
CONTROL PUSHBUTTONS (Enhanced and standard front panels)
Number of pushbuttons: 7
Operation: drive FlexLogic operands
USER-PROGRAMMABLE PUSHBUTTONS (Optional)
Number of pushbuttons: 12 on standard front panel
16 on enhanced horizontal front panel
6 on enhanced vertical front panel
16 on graphical front panel (8 physical pushbuttons, 8 graphical interface pushbuttons)
Mode: self-reset, latched
Display message: 2 lines of 20 characters each
Drop-out timer: 0.00 to 60.00 s in steps of 0.05
Autoreset timer: 0.2 to 600.0 s in steps of 0.1
Hold timer: 0.0 to 10.0 s in steps of 0.1
DIGITAL ELEMENTS
Number of elements: 48
Operating signal: any FlexLogic operand
Pickup delay: 0.000 to 999999.999 s in steps of 0.001
Dropout delay: 0.000 to 999999.999 s in steps of 0.001
Timing accuracy: ±3% or ±4 ms, whichever is greater
2.5.3 Monitoring
OSCILLOGRAPHY
Maximum records: 64
Sampling rate: 64 samples per power cycle

GE B90 Specifications

General

Brand	GE
Model	B90
Category	Relays
Language	English