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MS220Vi and MSR220Vi  

11910-0701-01

  

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www.ziehl.de 

  

14.3  Wiring 

The lines of the sensor circuit are to be routed as separate control lines. The use of lines of the supply cable or 
other mainstream lines is not permissible. If extreme inductive or capacitive stray effects are to be expected by 
parallel cables of the power installation, shielded control lines should be used. Recommendations for intrinsic 
safety protection should be observed. 
 
For devices type MSR the terminals Y1, Y2 may be attached parallel to a common resetting mechanism. Sensor 
lines may not be connected together. 
 
The line resistance within the sensor circuit may not exceed a value of 20 Ω. 
 
Maximum of permissible length for sensor circuit lines: 

Wire cross section 

Wire length 

2,5 mm

2

 

2 x 500 m 

1,5 mm

2

 

2 x 400 m 

1,0 mm

2

 

2 x 250 m 

0,75 mm

2

 

2 x 150 m 

0,5 mm

2

 

2 x 100 m 

 
With commissioning and after modification of the plant the sensor resistance must be checked with a suitable 
measuring instrument. With a resistance < 50 Ω the sensor circuit is to be examined for short-circuit. 
 
 
 

Attention! Check PTCs only with measuring voltages of < 2.5 V

 
 

 

14.4  Safe Separation 

Mains supply circuits (A1, A2 in devices with transformer), (11, 12, 14 and 21, 22, 24) have safe separation to 
low-voltage electric circuit (Y1, Y2) as well as to the intrinsically safe circuit (T1, T2). 
Tripping devices with combined supply voltage DC/AC 24 V have no potential separation and are only permitted 
with power  supplies that  comply with the requirements of EN 61558 / DIN VDE 0551 (safety transformer  or 
battery power) and when protected wiring is used. Caution! Supply voltage AC 24 V must not be grounded to 
earth (PA). 
 

14.5  Stop function 

A stop function released by the protection device must transfer the machine after manipulation of this function 
as fast as possible into a safe condition. The stop function must have top priority. 
In case of failure the relay switches off the contactor/circuit breaker and so prevents an overheating of the 
isolation system and/or the surface temperature. The protective function of the equipment is guaranteed only 
if wiring is done directly into the control circuit of the motor/machine in accordance with the connection 
diagram. The contacts must be protected, in order to prevent welding. 
 

 

Attention!  

 

The relay contacts must be fused externally to prevent welding of the 

 

contacts. Recommended fuses see technical data. 

 

14.6  Start and Restart 

A restart may take place automatically only if no dangerous condition can be present. The tripping devices of 
types MS 220 Vi are equipped with an automatic reset function. For this device design, suitable wiring of the 
control units must be ensured to prevent automatic restarting of the explosive-protected motor of the type of 
protection Increased Safety „e“ in case of failure. 
 

14.7  Manual resetting 

After introducing a stop instruction by the protection device this must be maintained, until the manual resetting 
mechanism is operated and safe conditions for a renewed start are given. The manual resetting may be only 
possible, if all safety functions and protection devices are effective. 
Trip device type MSR has an electronic reclosing lock. The stop instruction remains, until pressing the push-

Summary of Contents for MS220Vi

Page 1: ...0Vi updated 2019 02 28 Su MS220Vi and MSR220Vi 11910 0701 01 Page 1 12 www ziehl de ZIEHL industrie elektronik GmbH Co KG Daimlerstr 13 74523 Schwaebisch Hall Germany 49 791 504 0 info ziehl de www ziehl de PTC Thermistor Relay TMP tripping device with circuit for temperature sensors in ignition protection type ex i marking see type plate EC type examination certificate PTB 07 ATEX 2055 ...

Page 2: ...oting and remedies 6 12 Technical Data 7 13 Dimensions Design V4 9 14 Safety Instructions and references for putting into operation 9 14 1 Special remarks for explosive gas atmospheres areas Zone 0 Zone 1 and Zone 2 9 14 2 Special remarks for use in the presence of combustible dust Zone 20 Zone 21 and Zone 22 9 14 3 Wiring 10 14 4 Safe Separation 10 14 5 Stop function 10 14 6 Start and Restart 10 ...

Page 3: ...perature protection in the temperature range 60 C up to 180 C ZIEHL PTC thermistor relays are conform to EN 60947 8 PTC thermistors according DIN 44081 and DIN 44082 shall be connected PTC thermistors are suitable for the installation into windings of electrical machines bearings and transformers as well as to monitor the temperature of coolant airflow and gases II 1 G Ex ia Ga IIC II 1 D Ex ia Da...

Page 4: ...and contacts 11 12 and 21 22 close The devices also switch off in the case of sensor or line short circuit approx 20Ω or sensor or line interruption MS types switch on automatically when the temperature has decreased approx 5 C MSR types with electronic reclosing lock store shutdown and require a RESET push built in button or external with terminals Y1 Y2 closed or by return of supply voltage Stor...

Page 5: ...ath or serious injury Turn off and lock out all power supplying this device before working on this device 8 Installation The applicant must observe safety rules and standards Notice safety remarks The device can be mounted on 35 mm rail according EN 60715 or with screws M4 Option Housing design V4 wide 70 mm 4 TE The devices must be installed in a closed switchgear cabinet or in an enclosure of in...

Page 6: ...14 and 21 24 close The correct function of the tripping device must be checked by resistance simulation at terminals T1 and T2 This check is also performed after changes to the installation 10 Operating instructions MSR220Vi devices have an built in reset button and can be manually reseted after a fault signal Red alarm Alternately also an external button remote reset terminal Y1 Y2 can be used 11...

Page 7: ...erature TFS 60 C 180 C Response tolerance TFS 6 C Collective resistance cold thermistor 1 65 kΩ Terminal voltage 2 5 V at R 3 65 kΩ 2 V at R 1 65 kΩ 8 61 V at R Terminal current 1 mA Power consumption 2 mW Line capacity max 0 2 µF Temperature monitor cut out point 3 3 kΩ 3 65 kΩ 3 85 kΩ Temperature monitor reclosing point 1 7 kΩ 1 8 kΩ 1 95 kΩ Short circuit monitor cut out point 20 Ω Short circuit...

Page 8: ... Fire protction class UL 94 V 2 Protection class housing EN 60529 IP 30 Mounting EN 60715 Standard rail 35 mm Optional Screw mounting M4 only with additional bar not included Weight approx 180 g Conecction terminals Screw mounting M3 Protection class EN 60529 IP 20 Torque 0 5 Nm 3 6 lb in Line connection solid wire Stranded wire with insulated ferrules Insulation strip length min 1 x 0 50 2 5 mm2 ...

Page 9: ...ersonnel only Inappropriate behavior can cause heavy personal damage and damages to property The relay may be installed only outside potentially explosive atmospheres Within potentially explosive atmospheres the equipment is to be provided with a pressurized enclosure according EN 60079 2 14 2 Special remarks for use in the presence of combustible dust Zone 20 Zone 21 and Zone 22 The increased dan...

Page 10: ...DIN VDE 0551 safety transformer or battery power and when protected wiring is used Caution Supply voltage AC 24 V must not be grounded to earth PA 14 5 Stop function A stop function released by the protection device must transfer the machine after manipulation of this function as fast as possible into a safe condition The stop function must have top priority In case of failure the relay switches o...

Page 11: ...be tested by interrupt of the sensor line at terminals T1 or T2 The short circuit monitoring function has to be tested by bridging the sensor line at terminals T1 and T2 Trip relay MSR the function of the electronic interlock has to be tested additionally If an error is detected no restart must be induced until the error is cleared The response of the thermal motor protection must directly switch ...

Page 12: ...sic requirements and complies with the following directives of the European Union 2014 35 EU Niederspannungsrichtlinie Low Voltage Directive 2014 30 EU EMV Richtlinie EMC Directive 2014 34 EU ATEX Richtlinie ATEX Directive 2011 65 EU RoHS Richtlinie 2015 863 EU RoHS Directive Angewandte harmonisierte Normen und technischen Spezifikationen Applied harmonised standards and technical specifications E...

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