MTL5011B安全柵DI開關(guān)量

detectors
Voltage applied to sensor
7 to 9V from 1kΩ ±10%
Input/output characteristics
Normal (reverse) phase:
 output energised (de-energised) if Iin >2.1mA or Rin <2kΩ
 output de-energised (energised) if Iin <1.2mA or Rin >10kΩ
Hysteresis: 200µA, typical
Line fault detection (LFD)
User-selectable, via switches on the top of unit. Line faults are
indicated by an LED. A detected line fault de-energises the
relay.
Open-circuit alarm on if Iin<100µA
Open-circuit alarm off if Iin>250µA
Short-circuit alarm on if Rin<100Ω
Short-circuit alarm off if Rin>360Ω
Note: Resistors must be fitted when using the LFD facility with a contact input
500Ω to 1kΩ in series with switch
20kΩ to 25kΩ in parallel with switch
Phase reversal
User-selectable, via switches on the top of unit.
Relay type
Single-pole changeover relay
Note: reactive loads must be adequately suppressed
Relay characteristics
Response time: 10ms maximum
Contact rating: 250V ac, 2A, cosø >0.7
40V dc, 2A, resistive load



LED indicators
Green: power indication
Yellow: status of channel (on when outputs are energised)
Red: LFD indication (on when line fault detected)
Maximum current consumption
40mA at 20V
35mA at 24V
25mA at 35V
Maximum power dissipation
0.75W at 24V
0.8W at 35V
Isolation
250V ac or dc between power supply, hazardous-area circuits
and relay outputs
Safety description (each channel)
10.5V, 800Ω, 14mA, Um = 250V rms or dc

 

1、安全柵應(yīng)安裝在非危險場所。

2、安全柵通往現(xiàn)場(危險場所)的軟銅導(dǎo)線截面積必須大于0.5mm²。

3、連接導(dǎo)線的絕緣強(qiáng)度大于500V。

4、本安端(有藍(lán)色標(biāo)記)和非本安端電路配線，不得接錯和混淆。本安導(dǎo)線宜選用藍(lán)色作為本安標(biāo)記。本安導(dǎo)線和非本安導(dǎo)線在匯線槽中應(yīng)分開鋪設(shè)，采用各自保護(hù)套管。安全柵的本安側(cè)，不允

許混淆有其它電源，包括其它本安電路的電源。

5、安全柵與一次儀表組成本安安全防爆系統(tǒng)時，必須經(jīng)國家指定的防爆檢驗機(jī)構(gòu)檢驗認(rèn)可。PH系列安全柵安全柵由國家防爆電氣監(jiān)督檢驗中心，給出的Co，Lo分布參數(shù)是相對與ⅡC級(氫氣級)

的最大允許值對于ⅡB級環(huán)境可把該參數(shù)乘以3，對于ⅡA級環(huán)境可把該參數(shù)乘以8。傳輸線選用不同規(guī)格的電纜時，其本身的電纜參數(shù)應(yīng)予高度重視，不得超過規(guī)定值。

6、對安全柵進(jìn)行單獨(dú)通電調(diào)試時，必須注意安全柵的型號、電源極性、電壓等級及安全柵外殼接線端上的標(biāo)號。

7、嚴(yán)禁用兆歐表測試隔離安全柵端子之間的絕緣性。若要檢查系統(tǒng)線路絕緣性時，應(yīng)先斷開全部安全柵接線，否則會引起內(nèi)部器件損壞。

SPECIFICATION
See also common specification
Number of channels
One
Location of switch
Zone 0, IIC, T6 hazardous area
Div. 1, Group A hazardous location
Location of proximity detector
Zone 0, IIC, T4–6 hazardous area if suitably certified
Div. 1, Group A hazardous location
Safe-area output
One relay with changeover contacts
Hazardous-area input
Input conforming to NAMUR/DIN 19234 standards for proximity