FW Murphy EVS Series Electronic Vibration Switch
电子振动开关
美国摩菲Murphy公司是专业的振动开关产品生产厂家,在行业内拥有70多年经验。多年来,摩菲公司生产的振动开关产品以其高可靠性和误报率,受到了包括SPX、GEA、IHW、Howden、Hamon、Bechtel、龙源冷却、江苏双良等国内外用户的好评。作为摩菲公司在国内的代理,信德迈科技(北京)有限公司将竭诚为您服务!
EVS电子振动开关特性:
具有通用安装底板和螺栓,可直接替换机械振动开关
4-20mA信号输出
继电器或可控硅开关的两极报警
环境防护等级:NEMA 4X, IP65
防爆认证: CSA, ATEX, CE
温度范围:-40℃~+85℃
安装都非常简单 安装后无需维护
EVS电子振动开关应用:
泵
电动机
工业风扇
热交换器/冷却塔
发动机
往复式压缩机
离心分离机
碎石机或磨煤机
EVS电子振动开技术指标:
Murphy EVS-SB – Internal Battery Power
. Battery power provided via 7.2V V lithium-Ion cell(s)
. Open circuit maximum voltage of 10VDC.
. Batter Life – 1 year under normal operation
. Normal operation 10v> Vbat> 6.4v
. Low battery mode: 5.0v< Vbat< 6.4v
. System shutdown and alarm mode active below 5.0v
Murphy EVS-A, EVS-S – External DC Power
. External power: 8-32 VDC
. Input Current: 100mA Max
Product Accuracy
. ±5% of full scale at 1.5 ips and 21 deg C.
. ±5% Variation over temperature from 21 deg C, over
operating range..
. Integration Stage End-to-End Noise: <0.01 ips RMS
Murphy EVS-S and EVS-A
. ±5%, at Bandwidth of 6 to 500 Hz from 50Hz calibration
point
. ±3dB at Bandwidth of 3 to 875 Hz, worst case
Murphy EVS-SB
. ±5%, at Bandwidth of 6 to 350 Hz from 50Hz calibration
point
. ±3dB at Bandwidth of 3 to 875 Hz, worst case
Trigger Feature
. Trigger level between 0.1 and 1.5 inches per second (ips)
Peak
. Trigger set with single turn adjustable PC board mount
potentiometer
. PC board marked with 15 marks corresponding to 0.1 to 1.5
in 0.1 increments
Time Delay Feature
. Adjustable from 0 to 10 seconds
. Set with adjustable single turn PC board mount
potentiometer
. PC board marked with 11 marks corresponding to 0 to 10
seconds in 1 second intervals
Output
. Normally-Open and Normally-Closed outputs simultaneously
available
. Open-collector outputs sink to Common Ground
. 50 mA sink capacity
. Input voltage: 40 VDC maximum
. Switch output is selectable for latched or non-latch
configurations. Reset accomplished by reset pushbutton or
external contact closure when in latch mode.
. Shutdown Alarm activated on power loss
LED Outputs
Alarm LED output
. Red LED
. LED strobing for first 5 minutes after entering Alarm mode
. Flashing thereafter until Reset activated
. Strobe rate: 2mSec on, every 0.5 ±0.25 seconds
. Flash rate: 2mSec on, every 6 ±1 seconds
Power LED output
.. Green LED
. Flash Duration: 2mSec
Murphy EVS-S and EVS-A
. Flash once every 6 ±1 seconds
Murphy EVS-SB
. 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)
. Power obtained from power supply
. Loop Resistance: 600 ohms max at 24 V and 20mA.
. Current loop accuracy ±5% from internal setpoint
. 20 ma corresponds to 1.5 ips Peak
. 4 ma corresponds to 0 ips Peak
Reset
. Local reset switch w/momentary contact
. External reset: Available via header and will require an
external relay or pushbutton contact to ground to activate the
reset.
. Activation Period: Reset must be active for 0.5 sec.
minimum to reset the switch.
Circuit Functional blocks
. 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
.. Bandpass Filter
- Frequency response dependent on model number (refer to
“Product Accuracy”)
.. Integration
- Integration to convert from G to IPS peak
Approvals
. Hazardous Area approvals applied for. (refer to “Product
Table”)
美国摩菲Murphy振动开关国内客户列表:
美国SPX(斯必克)冷却技术公司
德国基伊埃(GEA)
德国基伊埃电力冷却技术(中国)有限公司
豪顿华工程有限公司Howden
荏原机械(中国)有限公司Ebara
北京龙源冷却技术有限公司
北京首航艾启威节能技术股份有限公司IHW
首航波纹管制造有限公司
首航艾启威冷却技术(北京)有限公司
瑞士艾启威(IHW)联合设计集团
江苏双良空调设备股份有限公司
哈尔滨空调设备股份有限公司
保定惠阳航空螺旋桨制造厂
石家庄红叶风机有限公司
上海神风制冷设备有限公司
陕西四达散热器有限公司
江苏中联风能机械有限公司
浙江明新风机有限公司
山西捷益热能设备有限公司
山西申华电站设备有限公司、
(兰州石油机械研究所)甘肃蓝科石化设备有限责任公司
四川川空换热器有限公司、
山西科工龙盛科技有限公司
内蒙古的金岛重工有限公司
中国航天科工集团第六研究院国营红岗机械厂
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