GE MI-869 - Page 35

CHAPTER 1: INTRODUCTION SPECIFICATIONS
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 1–25
CLOCK
Setup:........................................................................Date and Time, Daylight Saving Time, UTC (Coordinated
Universal Time)
Backup Retention: ..............................................1 hour
IRIG-B INPUT
Auto-detect: ..........................................................DC and AM
Amplitude Modulation:.....................................1 V to 10 V pk-to-pk
DC Shift:...................................................................TTL
Input Impedance:................................................40 kΩ
Isolation:..................................................................2 kV
RTD INPUTS
Types (3-wire):.......................................................100 Ω Platinum, 120 Ω Nickel, 100 Ω Nickel, 10 Ω Copper
Sensing current:...................................................5 mA
Range: ......................................................................–40 to +250°C (-40 to +482°F)
Accuracy:................................................................±2°C (±4°F)
Isolation:..................................................................36 V pk-pk (a group of RTDs to ground)
Lead Resistance: .................................................25 Ohms max. per lead for platinum or nickel and 3 Ohms
max. per lead for copper RTDs