2-18 B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUALSPECIFICATIONS CHAPTER 2: PRODUCT DESCRIPTION2Time delay: 0 to 65535 ms in steps of 1FLEX STATESNumber: up to 256 logical variables grouped under 16 Modbus addressesProgrammability: any logical variable, contact, or virtual inputNON-VOLATILE LATCHESType: set-dominant or reset-dominantNumber: 16 (individually programmed)Output: stored in non-volatile memoryExecution sequence: as input prior to protection, control, and FlexLogicUSER-PROGRAMMABLE LEDs (Enhanced and standard front panels)Number: 48 plus trip and alarmProgrammability: from any logical variable, contact, or virtual inputReset mode: self-reset or latchedLED TESTInitiation: from any contact input or user-programmable conditionNumber of tests: 3, interruptible at any timeDuration of full test: approximately 3 minutesTest sequence 1: all LEDs onTest sequence 2: all LEDs off, one LED at a time on for 1 sTest sequence 3: all LEDs on, one LED at a time off for 1 sUSER-DEFINABLE DISPLAYS (Enhanced and standard front panels)Number of displays: 16Lines of display: 2 × 20 alphanumeric charactersParameters: up to 5, any Modbus register addressesInvoking and scrolling: keypad, or any user-programmable condition, including pushbuttonsCONTROL PUSHBUTTONS (Enhanced and standard front panels)Number of pushbuttons: 7Operation: drive FlexLogic operandsUSER-PROGRAMMABLE PUSHBUTTONS (Optional)Number of pushbuttons: 12 on standard front panel16 on enhanced horizontal front panel6 on enhanced vertical front panel16 on graphical front panel (8 physical pushbuttons, 8 graphical interface pushbuttons)Mode: self-reset, latchedDisplay message: 2 lines of 20 characters eachDrop-out timer: 0.00 to 60.00 s in steps of 0.05Autoreset timer: 0.2 to 600.0 s in steps of 0.1Hold timer: 0.0 to 10.0 s in steps of 0.1DIGITAL ELEMENTSNumber of elements: 48Operating signal: any FlexLogic operandPickup delay: 0.000 to 999999.999 s in steps of 0.001Dropout delay: 0.000 to 999999.999 s in steps of 0.001Timing accuracy: ±3% or ±4 ms, whichever is greater2.5.3 MonitoringOSCILLOGRAPHYMaximum records: 64Sampling rate: 64 samples per power cycle
