Murphy EVS-A-EX - Manual (Page 2)

Warranty - A limited warranty on materials and workmanship for one year is given with this FW Murphy product. A copy of the
warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm
Specifications
Environmental
ƒ Operating Temperature:-40 °F to 185°F (-40°C and +85°C).
ƒ Humidity: 0-95% non-condensing
ƒ Vibration: 30 g’s (Mechanical stability)
Power Requirements
Murphy EVS-SB – Internal Battery Power
ƒ
Battery power provided via 7.2V V lithium-Ion cell(s)
ƒ Open circuit maximum voltage of 10VDC.
ƒ Batter Life – 1 year under normal operation
ƒ Normal operation 10v> Vbat> 6.4v
ƒ Low battery mode: 5.0v< Vbat< 6.4v
ƒ System shutdown and alarm mode active below 5.0v
Murphy EVS-A, EVS-S – External DC Power
ƒ
External power: 8-32 VDC
ƒ Input Current: 100mA Max
Product Accuracy
ƒ ±5% of full scale at 1.5 ips and 21 deg C.
ƒ ±5% Variation over temperature from 21 deg C, over
operating range..
ƒ Integration Stage End-to-End Noise: <0.01 ips RMS
Murphy EVS-S and EVS-A
ƒ
±5%, at Bandwidth of 6 to 500 Hz from 50Hz calibration
point
ƒ ±3dB at Bandwidth of 3 to 875 Hz, worst case
Murphy EVS-SB
ƒ
±5%, at Bandwidth of 6 to 350 Hz from 50Hz calibration
point
ƒ ±3dB at Bandwidth of 3 to 875 Hz, worst case
Trigger Feature
ƒ Trigger level between 0.1 and 1.5 inches per second (ips)
Peak
ƒ Trigger set with single turn adjustable PC board mount
potentiometer
ƒ PC board marked with 15 marks corresponding to 0.1 to 1.5
in 0.1 increments
Time Delay Feature
ƒ Adjustable from 0 to 10 seconds
ƒ Set with adjustable single turn PC board mount
potentiometer
ƒ PC board marked with 11 marks corresponding to 0 to 10
seconds in 1 second intervals
Output
ƒ Normally-Open and Normally-Closed outputs simultaneously
available
ƒ Open-collector outputs sink to Common Ground
ƒ 50 mA sink capacity
ƒ Input voltage: 40 VDC maximum
ƒ Switch output is selectable for latched or non-latch
configurations. Reset accomplished by reset pushbutton or
external contact closure when in latch mode.
ƒ Shutdown Alarm activated on power loss
LED Outputs
Alarm LED output
ƒ
Red LED
ƒ LED strobing for first 5 minutes after entering Alarm mode
ƒ Flashing thereafter until Reset activated
ƒ Strobe rate: 2mSec on, every 0.5
±0.25 seconds
ƒ Flash rate: 2mSec on, every 6
±1 seconds
Power LED output
ƒ Green
LED
ƒ Flash Duration: 2mSec
Murphy EVS-S and EVS-A
ƒ
Flash once every 6
±1 seconds
Murphy EVS-SB
ƒ
Battery status “Normal”: Flash once every 6 ±1 seconds
Battery in “Low-Battery” range: Flash once every 12 ±1
seconds
4-20mA output (EVS-A only)
ƒ Power obtained from power supply
ƒ Loop Resistance: 600 ohms max at 24 V and 20mA.
ƒ Current loop accuracy
±5% from internal setpoint
ƒ 20 ma corresponds to 1.5 ips Peak
ƒ 4 ma corresponds to 0 ips Peak
Reset
ƒ Local reset switch w/momentary contact
ƒ External reset: Available via header and will require an
external relay or pushbutton contact to ground to activate the
reset.
ƒ Activation Period: Reset must be active for 0.5 sec.
minimum to reset the switch.
Circuit Functional blocks
ƒ Charge Amp interface
- The input Transducer is an integrated PZT element for
measuring acceleration with an internal charge converter.
- Maximum G level of 13 g’s at 500hz
ƒ Bandpass Filter
- Frequency response dependent on model number (refer to
“Product Accuracy”)
ƒ Integration
- Integration to convert from G to IPS peak
Approvals
ƒ Hazardous Area approvals applied for. (refer to “Product
Table”)
NMEA 4
Product Dimensions and Sensitivity Axis