Condition Monitoring - XM-220 Dual Speed Module

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XM-220 Dual Speed Module

220 Dual Speed Module

The XM^® series from Rockwell Automation is the world's first machine monitoring and protection system designed as a distributed network of modules deployed on an open standard industrial bus.

The XM-220 Speed Module is an intelligent 2-channel measurement module that accepts input from two tachometers of any standard type including eddy current probes, magnetic pickups, optical tachometers and TTL output devices.

The module measures speed, rotor acceleration and peak speed and is capable of detecting zero speed, locked rotor and reverse rotation. The module may also serve as a component of an Electronic Overspeed Detection System (EODS).

The XM-220 can be configured to operate in three different modes. This controls how the sensors are used to calculate the speed, acceleration, and peak measurements.

Dual Channel Mode

This is the default mode. The two sensors are used independently to perform two separate speed, acceleration, and peak speed measurements.

Single Redundant Channel Mode

One sensor is used to perform the speed, acceleration, and peak speed measurement. The module automatically switches to the second (redundant) sensor when a transducer or tachometer fault is detected on the current sensor.

Reverse Rotation Mode

The two sensors are used to monitor both speed and direction. The first sensor measures the speed, acceleration, and peak speed in the forward direction. The second sensor measures the speed, acceleration, and peak speed in the reverse

The module includes a single on board relay, expandable to five, two 4-20mA outputs, and a buffered output for each input. A third buffered output is available when the module is functioning in the single redundant channel mode. This buffered output signal corresponds to the active input signal. It is provided so that connected devices, including other XM modules, can be assured of always receiving a valid speed signal - as long as at least one of the two redundant speed inputs is functioning properly.

The XM-220 can operate stand alone, or it can be deployed on a standard or dedicated DeviceNet network where it can provide real-time data and status information to other XM modules, PLCs, distributed control systems (DCS), and Condition Monitoring Systems.

Configuration can be performed either locally or remotely via the DeviceNet network. Local configuration is provided by a simple, intuitive Serial Configuration Utility executing on a PC connected to the modules serial communications port. Remote configuration can be performed from any networked PC executing either any standard DeviceNet configuration software, or the XM specific configuration tool included in RSI's RSMACC EOL software system.

Specifications

Communication

DeviceNet:

Standard DeviceNet protocol for all functions
NOTE: The XM-220 uses only the DeviceNet protocol, not power. Module power is provided independently.
Available Electronic Data Sheet (EDS) file provides support by most DeviceNet compliant systems
Baud rate automatically set by bus master to 125kb, 250kb or 500kb
Configurable I/O Poll Response size (bytes) and Assembly helps optimize space utilization within users scanner input tables

Side Connector:

All XM measurement and relay modules include side connectors that allow interconnecting adjacent modules thereby simplifying the external wiring requirements. The Interconnect provides primary power, DeviceNet communication and the circuits necessary to support the XM-441 Expansion Relay module.

Serial:¬

RS-232 via mini-connector or terminal block
Baud rate fixed at 19200

¬ Local configuration via Serial Utility Program

Indicators

LEDs:

Module Status – red/green
Network Status – red/green
Channel 1 Status – off/yellow/red
Channel 2 Status – off/yellow/red
Startup – off/yellow
Relay – off/red

Inputs

2 Tachometer Inputs:

±25V (50V maximum peak to peak)

Eddy current transducer signals
Magnetic pickups
TTL output devices

Input Impedance:

120k ohms minimum

Speed/Frequency Range:

1 to 1,200,000 RPM

0.0167 to 20,000Hz

Speed Measurement Error:

1 to 240 RPM: ±0.2 RPM

241 to 12,000 RPM: ±2 RPM

12,001 to 20,400 RPM: ±5 RPM

20,401 to 120,000 RPM: ±20 RPM

120,001 to 360,000 RPM: ±50 RPM

360,001 to 1,200,000 RPM: ±160 RPM

Sensor Fault Detection:

Eddy Current Transducer—Bias voltage is compared with user defined fault limits
Magnetic pickups—A current source is available for biasing passive magnetic pickups to detect open or short circuits

Outputs

4-20mA Outputs:

Each output is independently programmed to represent speed or acceleration, from either channel
2 isolated outputs
300 ohm max load

Buffered Outputs:

1 active buffer per input channel
Output range configurable by wiring: -24V to +9V, -4.7 to +24V, -4.7 to 9V
Third buffered output available when the module is configured for single redundant channel mode.

Outputs a TTL level square-wave that corresponds to the active input signal.

Single Conditioning

Measured Units:

RPM
Acceleration in RPM/Minute
Direction of rotation

Measured Parameters:

Direction (Forward / Reverse)
Speed
Acceleration
Peak Speed
Gap / Bias voltage

Peak Speed:

Retains the value of the highest speed observed, per channel, since the module was powered up or since the "peak speed" value was manually reset.

Measurement Modes:

Dual Channel—Inputs are used independently to perform two separate speed, acceleration and peak speed measurements.
Single Redundant Channel—One sensor is used to perform the speed, acceleration and peak speed measurement. If the current sensor fails the module automatically switches to the second (redundant) sensor.
Reverse Rotation—Two sensors are used to monitor both the speed and direction. The first sensor measures the speed, acceleration and peak speed in the forward direction. The second sensor measures the speed, acceleration and peak speed in the reverse direction.

Amplitude Range:

Dependent on sensitivity

Integration:

One level provided in hardware

Low Pass Filters:

Independently configured per channel

Optional Overall measurement LP filter: 200 Hz - 20 kHz; Roll Off: -24 dB per octave

High Pass Filters:

Independently configured per channel

Integration OFF: 1, 5, 10, 40, 1000 Hz, Roll Off: -30 dB per octave for the 1 Hz HPF, otherwise -24 dB per octave
Integration ON: 5, 10, 40, 1000 Hz, Roll Off: -30 dB per octave for the 5 Hz HPF, otherwise -24 dB per octave

Units:

g		mm/s
um		psi
ips		mils
volt		Pa

Non-Volatile Configuration

A copy of the module configuration is retained in nonvolatile memory from where it is read upon power up.¬

¬ The configuration stored in Non-Volatile memory can only be deleted by module-reset command sent via the serial interface, using the Serial Configuration Utility, or via DeviceNet from any compliant software application.

Alarms

Number:

8 alarms, 4 per channel

Alarmed Parameters:

Alarm and danger pair provided for each of:

Speed
Acceleration
Zero Speed
Locked Rotor

Operators:

Greater than
Less than
Inside Range
Outside Range

Hysteresis:

User configurable

Startup Inhibit/Set Point Multiplication:

User configurable

Speed Inhibit:

A speed range may be specified for each alarm. The alarm is disabled when the speed is outside of the range.

Relays

Number:

Single on-board relay, two sets of contacts–DPDT (2 Form C), plus
Four virtual relays or
Four additional relays when linked to an XM-441 Expansion Relay module.

Onboard Relay Rating:

Max. Voltage = 120 Vdc, 125 Vac
Max. Current = 3.5 A ¬
Min. Current = 0
Max. Power = 60 W, 62.5 VA
UL Rating: 120 Vac @ 0.5 Amps resistive; 110 Vdc @ 0.3 Amps resistive; 30 Vdc @ 1.0 Amps resistive

¬ Max current is up to 40°C, then derates to 2A at 65°C. For Expansion Relay Rating refer to XM441 Technical data sheet ENMON-TD441A-EN-P

Failsafe:

Normally energized (failsafe), or
Normally de-energized (non-fail-safe)

Latching:

Latching, or
Non-latching

Time Delay:

0 to 25.5 seconds in 100msec increments

Voting Logic:

Single or paired "And" or "Or" logic applied to any alarms

Reset:

Local reset switch on top of module
Remote reset switch wired to terminal base
Digital reset command via serial or DeviceNet interface

Activation On:

Alarm Status
- Normal
- Alert
- Danger
- Disarm
Transducer Fault
Module Fault
Tachometer Fault

Power

Module:

21.6 - 26.4Vdc

Consumption:

Max: 300mA; Typical: 255mA

Heat Production:

Max: 7 Watts (24 BTU/hr); Typical: 4 Watts (14 BTU/hr)

Transducer:

24V DC, user configurable with wiring

Redundant Power: All XM Measurement and Relay modules support redundant power. Each module includes redundant power inputs on its terminal base.

Approvals

				ODVA
				Ex
CE, C-Tick, ODVA, CSA Class I, Div 2, Groups A, B, C, D, UL, EEX

Environmental

Environmental
Operating Temperature	-20 to +65ºC (-4 to 149ºF)
Storage Temperature	-40 to +85ºC (-40 to 185ºF)
Relative Humidity	95% non-condensing

Conformal Coating

All printed circuit boards are conformal coated:

Per material specifications MIL-I-46058C / IPC-CC-830
In accordance with IPC-A-610C

Physical

Dimensions:
Height	3.8in(97mm)
Width	3.7in(94mm)
Depth	3.7 in(94mm)

Ordering Instructions

Catalog Number	Description
1440-SPD02-01RB	XM-220 Dual Speed Module¬
1440-TB-B	Terminal Base B for XM-220 & XM-320
1440-SCDB9FXM2	XM Serial Communications Cable

¬ *Requires Terminal Base B*