Data Sheet of Casing Vibration Module M88250-DC of IRD8800 Series Machinery Protection System (MPS)

Data Sheet of Casing Vibration Module M88250-DC of IRD8800 Series Machinery Protection System (MPS)

Overview

M88250-DC is the Casing Vibration Module of IRD8800 Series Machinery Protection System (MPS) that is API 670 Compliant and designed for Round-the-Clock Machinery Monitoring and Protection. It is a 2 Channel module for Casing Vibration and it also has a dedicated Channel for 1 Keyphasor (Phase Reference). It boasts the following features:
  1. Hot-Swappable Rack Mounted Modules
  2. Alphanumeric Display and Bargraph Display for Live Vibration and Programming Menu - fully programmable via Front Keypad and Password Protected
  3. 4-20mA output for DCS/PLC/SCADA
  4. MODBUS RTU Output via RS485
  5. Two Sets of Alarm Relay and Two Sets of Trip Relay Contacts per Channel
  6. Buffered Outputs at front and back
  7. Start-up Protection
  8. Transducer Failure detection (Tx Fail)
M88250-DC Casing Vibration Module in use for Turbine Gearbox Casing Vibration

Technical Aspects

Power Input

Required Input Voltage
+24 V DC Nominal; Can accept 16-32 V DC
Required Input Current
1 A DC at +24 V DC
Required Input Power
24 VA
Input Power Connector
Via 48 Pin Male Backplane Connector
Redundant Power Input
Accepts Main and Redundant Power Input +24 V DC. Utilises Higher of the two. Switches via O Ring Diode present on Module SMPS

Signal Input

Number of Channels
2 Independent Channels for Casing Vibration
Supported Sensors
IEPE/ICP type Velometers like IRD531 or Seismic Velometers like IRD544M
Supported Sensitivity
0.1 mV/mm/s to 99.9 mV/mm/s
Common Input Sensitivities
4 mV/mm/s or 25 mV/mm/s for IRD531; 42.52 mV/mm/s for IRD544M
Keyphasor Input
Supports 1 Keyphasor (Phase Reference) Input
Keyphasor Sensor Type
Either Non-Contact Eddy Current Based Sensor OR Laser Tachometer Input
Keyphasor Sensitivity
Typically 8V/mm

Current Output

4-20mA Output
Proportional to set Full Scale Vibration
Isolation
Galvanically Isolated 4-20mA output

Relay Outputs

Type of Contacts
Potential Free Contacts
Alarm Relay Contacts
2 Sets of Alarm Relay Contacts (2 Sets of NO, C, NC) per Channel
Trip Relay Contacts
2 Sets of Trip Relay Contacts (2 Sets of NO, C, NC) per Channel
Relay Contact Rating
Rated for 5A @230 V AC Resistive

MODBUS Output

Protocol
MODBUS RTU
Medium
RS485
Module Address
001 to 255
Baud Rate
Default 9600
Parity
Choice between Odd, Even and None

Notes
IRD Mechanalysis Limited reserves the right to change specifications for betterment without prior notice