MTL700 / 7700 Zenera kliūtys DIN geležinkelio montavimo

The MTL7700 range of barriers protect devices located in all normally occurring explosive atmospheres, including air/flammable gas mixtures, dusts and fibres. Applications covered include the protection of installations incorporating uncertified devices (‘simple apparatus’) such as thermocouples, switches and resistive sensors, or separately certified ‘energy storing’ (or ‘voltage producing’) apparatus including ac sensors, transmitters and current-to-pneumatic (I/P) converters.

• Removable terminals
• Bussed power feed to other modules
• Relay and solid state switch modules
• Dual channel variants – 6.3mm per channel
• Proximity detector inputs
• Electronic fusing
• Direct replacement for MTL700 range barriers
• Compatible terminal numbering and safety descriptions

Specyfikacja

Model No.	Safety descriptiona			Polarities available			Application	Basic circuit		Max. end-to-end resistance	Vwkg at 10μA or (1μA)	Vmax	Fuse rating
MTL	V	Ω	mA	+	-	ac		Hazardous	Safe	Ω	V	V	mA
7706+	28	300	93	✔			Transmitters			See additional specification		35	50
7707+	28	300	93	✔			Switches					35	50
	28	diode										35	50
7707P+	28	164	171	✔			Transmitters, Switches, Controller outputs IIB					35	50
	28	diode	-									35	50
7710+	10	50	200	✔			6V DC [&] 4V AC systems			75	6.0	7.0	50
7715+	15	100	150	✔			12 V systems			119	12.0	13.1	100
7715P+	15	50	291	✔			12 V DC systems			64	12.3	13.4	100
7722+	22	150	147	✔			18 V DC systems			174	19.6	20.2	50
7728+	28	300	93	✔			Controller outputs, solenoids			333	25.9	26.5	50
7728-	28	300	93		✔		Transmitters			333	25.9	26.5	50
7728ac	28	300	93			✔	Controller outputs, solenoid valves			333	25.0	25.9	50
7728P+	28	234	119	✔			Controller outputs, solenoid valves IIB			252	24.9	25.9	100
774X	10	-	19				Prox sw input, solid state output and line fault detect			-	-	30/35	50
7755ac	3	10	300			✔	2- or 3- Wire RTDs (floating bridge)			19.0	(1)	3.4	250
	3	10	300			✔				19.0	(1)	3.4	250
7756ac	3	10	300			✔	3- Wire RTDs (grounded bridge)			19.0	(0.7)	2.7	250
	3	10	300			✔				19.0	(0.7)	2.7	250
	3	10	300			✔				19.0	(0.7)	2.7	250
7758+/-	7.5	10	750	✔	✔		Gas detectorsu			17	6.0	7.3	200
	7.5	10	750							17	6.0	7.3	200
7761ac	9	90	100			✔				107	6.0	7.0	100
	9	90	100							107	6.0	7.0	100
7761Pac	9	350	26			✔	Strain-gauge bridges			378	6.8	7.5	50
	9	350	26							107	6.0	7.0	100
7764+/ac	12	1k	12	✔		✔	Strain-gauge bridges			1050	10.0	10.9	50
	12	1k	12							1050	10.0	10.9	100
7766ac	12	150	80			✔				174	10.0	10.6	50
	12	150	80							174	10.0	10.6	50
7766Pac	12	75	157			✔	Strain-gauge bridges			92	9.6	10.5	100
	12	75	157				Strain-gauge bridges			92	9.6	10.5	100
7767+	15	100	150	✔			12 V dc systems			119	12.0	13.1	100
	15	100	150				12 V dc systems			119	12.0	13.1	100
7779+	28	300	93	✔			Controller outputs	Requires channels separate in IIC		333	25.9	26.5	50
	28	300	93				Controller outputs			333	25.9	26.5	50
7796+	26	300	87	✔			Vibration probes			333	23.9	24.5	50
	20	390	51							428	18.3	18.9	50
7796-	26	300	87		✔		Vibration probes			333	23.9	24.5	50
	20	390	51							428	18.3	18.9	50
7760ac	10	50	200			✔	Active dc [&] ac sensors Thermocouples			75	6.0	6.7	50
	10	50	200							75	6.0	6.7	50
7765ac	15	100	150			✔				124	12.0	12.5	50
	15	100	150							124	12.0	12.5	50
7778ac	28	600	47			✔				651	24.0	25.4	50
	28	600	47							651	24.0	25.4	50
7789+	28	300	93	✔			Switch inputs / Signal returns			651	26.6	27.2	50
										651	26.6	27.2	50
	28	diode	-							0.9V+26Ω	26.6	27.2	50
	28	diode	-							0.9V+26Ω	26.6	27.2	50
7787+/-	28	300	93	✔	✔		Transmitters, Controller outputs, Switches			333	26.6	27.2	50
	28	diode	-							0.9V+21Ω	26.6	27.2	50
7787P+/-	28	234	119	✔						253	26.4	27.2	80
	28	diode	-							0.9V+21Ω	26.4	27.2	80
7788+	28	300	93	✔						333	25.9	26.5	50
	10	50	200	✔			Transmitters			75	6.0	7.0	50
7788R+/-	28	300	93	✔						333	25.9	26.5	50
	10	50	200	✔						75	6.0	7.0	50

Correlation between MTL7700 - MTL7000 - MTL700 barriers (IIC)