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Truck scale load cell PR 6221, converter Connexx®, mounting kits and junction boxes PR 6021 Premium components for vehicle weighing
The load cell PR 6221 was designed specifically for use in truck scales. Its outstanding precision and long product lifetime cut service and calibration costs, and help to reduce downtimes to a minimum. In combination with the converter Connexx®, the PR 6221 becomes a digital solution.
Precise, fail-safe and extremely durable
- Both truck scale components are produced with great care in Germany. Their high quality guarantees accurate results, a long product lifetime and reduces costs in the medium term.
- Maximum lightning protection: with proper surge protection and potential equalisation, the PR 6221 can withstand voltages of up to at least 1,000 kV and currents of up to 100 kA without damage.
- The load cell guarantees accurate measurement results thanks to its special measuring element geometry.
- Developed for the harshest ambient conditions, the load cell can even withstand water immersion at a depth of 1.5 m for more than 10,000 hours.
Technical specifications
Technical data truck scale load cell PR 6221
| Designation | Description | Abbr. | C3* | C4* | C5* | C6* | Unit |
| Accuracy class | 0.015 | 0.012 | 0.010 | 0.008 | % Emax | ||
| Minimum dead load | Lowest limit of specified measuring range | Emin | 0 | % Emax | |||
| Maximum capacity | Highest limit of specified measuring range | Emax | 12.5 to 75 | t | |||
| Safe load limit | Maximum load possible without irreversible damage | Elim | |||||
| 37.5 | 37.5 | … | … | t | |||
| For Emax = 12.5 and 25 t | |||||||
| For Emax = 20 t | 40 | 40 | 40 | 40 | |||
| For Emax = 30 t | 60 | 60 | 60 | 60 | |||
| For Emax ≥ 50 t | 75 | 75 | 75 | 75 | |||
| Destructive load | Danger of mechanical | Ed | |||||
| destruction | |||||||
| > 75 | > 75 | … | … | t | |||
| For Emax = 12.5 and 25 t | |||||||
| For Emax = 20 t | > 100 | > 100 | > 100 | > 100 | |||
| For Emax = 30 t | > 150 | > 150 | > 150 | > 150 | |||
| For Emax ≥ 50 t | > 150 | > 150 | > 150 | > 150 | |||
| Minimum LC verification | Minimum load cell verification interval vmin = Emax/Y |
Y | 14,000 | 20,000 | 20,000 | 20,000 | |
| 14,000 | 18,000 | … | … | ||||
| Emax = 12.5 t | |||||||
| Deadload output return | Factor for deadload | Z | |||||
| output return after load | |||||||
| (DR = ½* Emax /Z) | 6,000 | 8,000(1) | 8,000(1) | 8,000(1) | |||
| For Emax ≥ 50 t | 6,000 | 6,000 | 6,000 | … | |||
| Rated output | Relative output at | Cn | |||||
| maximum capacity | |||||||
| 1.0 | 1.0 | … | … | mV/V | |||
| For Emax = 12.5 t | |||||||
| For Emax = 20 t, 30 t | 1.0 | 1.0 | 1.0 | 1.0 | |||
| For Emax = 25 t | 2.0 | 2.0 | 2.0 | 2.0 | |||
| For Emax = 50 t | 2.0 | 2.0 | 1.5 | 1.5 | |||
| For Emax = 60 t | 2.4 | 1.5 | 1.5 | 1.5 | |||
| For Emax = 75 t | 3.0 | 1.5 | 1.5 | 1.5 | |||
| Tolerance on rated output | Permissible deviation from rated output Cn | dc | < 0.07 | % Cn | |||
| Zero output signal | Load cell output signal under unloaded condition | Smin | 0 ± 1.0 | % Cn | |||
| Repeatability error | Max. change in load cell output for repeated loading | R | < 0.005 | % Cn | |||
| Creep | Max. change of output sig- nal at Emax during 30 min. | dcr | < 0.015 | < 0.0125 | < 0.010 | < 0.008 | % Cn |
| Non-linearity | Deviation from best straight line through zero | dLin | < 0.01 | % Cn | |||
| Hysteresis | Max. difference in LC output between loading and unloading | dhy | < 0.0165 | < 0.0125 | < 0.010 | < 0.008 | % Cn |
| Temperature effect on Smin | Max. change related to Cn of Smin per 10 K in BT | TKSmin | < 0.01 | < 0.007 | < 0.007 | < 0.007 | % Cn/10 K |
| Temperature effect on C | Max. change related to Cn of C per 10 K | TKC | < 0.01 | < 0.008 | < 0.007 | < 0.005 | % Cn/10 K |
| Input impedance | Between supply terminals | RLC | 1,080 ± 10 | Ω | |||
| Output impedance | Between measuring | RO | |||||
| terminals | |||||||
| 1,010 ± 1 | 1,010 ± 1 | 1,010 ± 1 | 1,010 ± 1 | Ω | |||
| For Emax ≤ 30 t | |||||||
| For Emax = 50 t | 1,010 ± 1 | 1,010 ± 1 | 760 ± 1 | 760 ± 1 | |||
| For Emax = 60 t | 1,010 ± 1 | 635 ± 1 | 635 ± 1 | 635 ± 1 | |||
| For Emax = 75 t | 1,010 ± 1 | 510 ± 1 | 510 ± 1 | 510 ± 1 | |||
| Designation | Description | Abbr. | C3* | C4* | C5* | C6* | Unit |
| Accuracy class | 0.015 | 0.012 | 0.010 | 0.008 | % Emax | ||
| Insulation impedance | Between measuring circuit and housing at 100 UDC | RIS | > 5,000 | MΩ | |||
| Insulation voltage | Between circuit and housing (PR 6221/ ..E only) |
500 | V | ||||
| Nominal supply voltage range | To hold the specified performance | Bu | 4 to 24 | V | |||
| Max. supply voltage | Continuous operation without damage to PR 6221/ ..E |
Umax | 32 25 |
V | |||
| Nominal ambient temp. range | To hold the specified performance | BT | -10 to +55 | °C | |||
| Usable ambient temp. range | Continuous operation without damage | BTU | -40 to +95 | °C | |||
| Storage temperature range | Without electrical and mechanical stress | BTi | -40 to +95 | °C | |||
| Permissible eccentricity | Permissible displacement from nominal load line | Sex | 5 | mm | |||
| Vibration resistance | Resistance against oscilla- tions (IEC 68-2-6 Fc) | 20 g, 100 h, 10 to 150 Hz | |||||
| Barometric pressure influence | Barometric pressure influence on Smin | PKSmin | 420 | g/kPa | |||
| Nominal deflection | Max. elastic deformation under maximum capacity For Emax = 12.5 t For Emax = 20 t For Emax = 25 t For Emax = 30 t For Emax = 50 t For Emax = 60 t For Emax = 75 t |
Snom | 0.2 0.4 0.5 0.5 0.8 0.9 1.1 |
0.2 0.4 0.5 0.5 0.8 0.9 1.1 |
… 0.4 0.5 0.5 0.8 0.9 1.1 |
… 0.4 0.5 0.5 0.8 0.9 1.1 |
mm |
| Material (housing) | 1.4301 (DIN EN 10088-3) | ||||||
| Protection class | – PR 6221: IP68** / IP69 – Connexx®: IP65 / IP68*** |
||||||
| Cables | TPE, colour: green, ø 5 mm, cable: 4 × 0.35 mm2, length: 16 m PR 6221/ ..E TPE, colour: blue, ø 5 mm, cable: 4 × 0.35 mm2, length: 20 m |
||||||
| Bending radius | ≥ 25 mm in case of fixed installation ≥ 75 mm in case of flexible installation |
||||||
| Connexx® | Description | Abbr. | Temperature range | Unit |
| Nominal ambient temp. range | To hold the specified performance | BT | -10 … +40 | °C |
| Usable ambient temp. range | Continuous operation without damage | BTu | -30 … +60 | °C |
| Storage temperature range | Without electrical and mechanical stress | BTi | -30 … +70 | °C |
* As per OIML R60
** The load cell can be submerged at a water depth of 1.5 m for 10,000 hours.
*** The module can be submerged at a water depth of 1.5 m for 100 hours.
(1) Z = 8,000 for -10 °C … +40°C, above +40°C Z = 6,000
Converter Connexx®
Fitted with the converter Connexx®, the load cell
- PR 6221 offers a comprehensive plus of possibilities: The digital version guarantees fast signalling times
- Thanks to the use of field bus communication, the cable junction box is no longer needed
- CANopen allows for extra-long communication paths of up to 200 m
- Weight values individually available for each load cell facilitate quick commissioning and make it easier to identify defective load cells
Dimensional drawings for load cells, mounting kits and junction boxes
Here you can select the right components for your truck scale load cell PR 6221. In addition to junction boxes and mounting kits, Minebea Intec offers a wide range of electronic weighing systems. Don’t hesitate to contact us about an individual complete solution!
| Truck scale load cell PR 6221 dimensions | ||||
 Truck scale load cell PR 6221 |
 Truck scale load cell PR 6221 |
 Truck scale load cell PR 6221 with standard load disc kit PR 6021/00N |
 Truck scale load cell PR 6221 with turbo load disc ../04N |
|
Mounting kit PR 6021/01N, ../03N, ../05N and converter Connexx® dimensions
Truck scale load cell PR 6221 in mounting kit PR 6021/01N
 |
 |
|---|---|
| Anti-rotation protection | Converter Connexx® |
 |
 |
|---|---|
| Mounting kit PR 6021/03N | Junction box PR 6021/68S |
| Junction box dimensions | ||
 Junction box PR 6021/08 and PR 6021/18 |
 Junction box PR 6021/68S |
|
All dimensions in mm
High restoring force
When driving onto the truck scale, the forces applied result in a deflection of the load cell. The restoring force ensures that the load cell returns to its centred rest position as quickly as possible.
When driving onto the truck scale, the forces applied result in a deflection of the load cell. The restoring force ensures that the load cell returns to its centred rest position as quickly as possible.
Maximum lightning protection
The truck scale load cells PR 6221 meet all requirements
The truck scale load cells PR 6221 meet all requirements
- Lightning surge current (Imax = 100 kA) 10 µs/350 µs (lightning protection class III) as per DIN EN 62475
- Lightning surge voltage (Umax = 1,000 kV) 1.2 µs/50 µs as per DIN EN/IEC 60060-1
In the event of proper surge protection, potential equalisation, protection of the measuring cable and in con- junction with Minebea Intec junction boxes and indicators, the analogue load cells can withstand voltages of at least 1,000 kV and currents of up to 100 kA without damage.
Time savings with matched output
The output impedance (Ro) and parameter (Cn) of the load cells are within a tight tolerance range (= matched output) both individually and together. This means that there may possibly be no need for electrical corner correction and only mechanical height adjustment will be required.
The output impedance (Ro) and parameter (Cn) of the load cells are within a tight tolerance range (= matched output) both individually and together. This means that there may possibly be no need for electrical corner correction and only mechanical height adjustment will be required.
| Highest IP protection class and regional explosion protection certificate | |||
| Zone | Marking | Certificate no | Load cell* |
| 0 and 1 | II 1G Ex ia IIC T6 Ga Ex ia IIC T6 Ga |
BVS 16 ATEX E 005 IECEx BVS 16.0005 |
PR 6221/..E |
| 20 and 21 | II 1D Ex ta IIIC T 160 °C Da Ex ta IIIC T 160 °C Da | TÜV 03 ATEX 2301X IECEx TUN 17.0025X | PR 6221 with add-on Atex zone 20/21 |
| 2 | II 3G Ex nA IIC T6 Gc | Manufacturer’s declaration | PR 6221 with add-on Atex zone 2/22 |
| 22 | II 3D Ex tc IIIC T 85 °C Dc | Manufacturer’s declaration | PR 6221 with add-on Atex zone 2/22 |
| Class I, II, III Div. 1 and 2 | IS CL I, II, III, DIV 1, GP A,B,C,D,E,F,G Entity – 4012 101 5688 | FM17US0276 | PR 6221 with add-on FM |
| NI CL I, II, III, DIV 2, GP A,B,C,D,E,F,G NIFW – | |||
| 4012 101 5688 | |||
| T4A Ta= -30 °C to 70 °C; T5 Ta= -30 °C to 55 | |||
| °C | |||
| Class I, II, III Div. 1 and 2 | IS CL I, II, III, DIV 1, GP A,B,C,D,E,F,G Entity – 4012 101 5688 | FM17CA0138 | PR 6221 with add-on FM |
| NI CL I, II, III, DIV 2, GP A,B,C,D,E,F,G NIFW – | |||
| 4012 101 5688 | |||
| T4A Ta= -30 °C to 70 °C; T5 Ta= -30 °C to 55 | |||
| °C | |||
* Please specify required explosion protection version when ordering.
Ordering information
| Truck scale load cell PR 6221, OIML R60 accuracy class C3 | |
| Type | Order number |
| PR 6221/12.5T C3 | 940522103312 |
| PR 6221/20TC3 | 940522103320 |
| PR 6221/25TC3 | 940522103325 |
| PR 6221/30TC3 | 940522103330 |
| PR 6221/50TC3 | 940522103350 |
| PR 6221/60TC3 | 940522103360 |
| PR 6221/75TC3 | 940522103375 |
| Truck scale load cell PR 6221, OIML R60 accuracy class C3, Ex version |
|
| Type | Order number |
| PR 6221/12,5T C3E | 940562103312 |
| PR 6221/20TC3E | 940562103320 |
| PR 6221/25TC3E | 940562103325 |
| PR 6221/30TC3E | 940562103330 |
| PR 6221/50TC3E | 940562103350 |
| PR 6221/60TC3E | 940562103360 |
| PR 6221/75TC3E | 940562103375 |
| Truck scale load cell PR 6221, OIML R60 accuracy class C4 | |
| Type | Order number |
| PR 6221/12.5T C4 | 940522104312 |
| PR 6221/20TC4 | 940522104320 |
| PR 6221/25TC4 | 940522104325 |
| PR 6221/30TC4 | 940522104330 |
| PR 6221/50TC4 | 940522104350 |
| PR 6221/60TC4 | 940522104360 |
| PR 6221/75TC4 | 940522104375 |
| Truck scale load cell PR 6221, OIML R60 accuracy class C4, Ex version |
|
| Type | Order number |
| PR 6221/12.5T C4E | 940562104312 |
| PR 6221/20TC4E | 940562104320 |
| PR 6221/25TC4E | 940562104325 |
| PR 6221/30TC4E | 940562104330 |
| PR 6221/50TC4E | 940562104350 |
| PR 6221/60TC4E | 940562104360 |
| PR 6221/75TC4E | 940562104375 |
| Truck scale load cell PR 6221, OIML R60 accuracy class C5 | |
| Type | Order number |
| PR 6221/20TC5 | 940522105320 |
| PR 6221/25TC5 | 940522105325 |
| PR 6221/30TC5 | 940522105330 |
| PR 6221/50TC5 | 940522105350 |
| PR 6221/60TC5 | 940522105360 |
| PR 6221/75TC5 | 940522105375 |
| Truck scale load cell PR 6221, OIML R60 accuracy class C5, Ex version |
|
| Type | Order number |
| PR 6221/20TC5E | 940562105320 |
| PR 6221/25TC5E | 940562105325 |
| PR 6221/30TC5E | 940562105330 |
| PR 6221/50TC5E | 940562105350 |
| PR 6221/60TC5E | 940562105360 |
| PR 6221/75TC5E | 940562105375 |
| Truck scale load cell PR 6221, OIML R60 accuracy class C6 | |
| Type | Order number |
| PR 6221/20TC6 | 940522106320 |
| PR 6221/25TC6 | 940522106325 |
| PR 6221/30TC6 | 940522106330 |
| PR 6221/50TC6 | 940522106350 |
| Truck scale load cell PR 6221, OIML R60 accuracy class C6, Ex version |
|
| Type | Order number |
| PR 6221/20TC6E | 940562106320 |
| PR 6221/25TC6E | 940562106325 |
| PR 6221/30TC6E | 940562106330 |
| Truck scale load cell PR 6221, converter Connexx® – load cell accessories | ||
| Type | Description | Order number |
| PR 6221/Digital kit | The converter Connexx® can be ordered with all load cells in the series PR 6221, with the exception of Ex versions. When ordering, both order numbers need to be given. | 940512100000 |
Additional information:
The converters Connexx® can be used with the indicator X3. To do this, the indicator X3 must be equipped with a CANopen interface card PR 5510/05 (940535510051). From 4 load cells, an external electrical supply with output 24 VDC, 30 W is required in combination with the X3.
| Truck scale load cell PR 6221, converter Connexx® – load cell accessories | ||
| Type | Description | Order number |
| PR 6152/10 | Connection cable between Connexx® and X3 (10 m) | 940536152101 |
| PR 6152/25 | Connection cable between Connexx® and X3 (25 m) | 940536152251 |
| PR 6152/40 | Connection cable between Connexx® and X3 (40 m) | 940536152401 |
| PR 6153/98 | Divided cable gland | 940536153981 |
| PR 6153/99 | Terminating resistor for Connexx®, M12 | 940536153991 |
| PR 6155/05 | Connection cable between Connexx® and Connexx® (5 m) | 940536155051 |
| PR 6155/10 | Connection cable between Connexx® and Connexx® (10 m) | 940536155101 |
| Mounting kits | ||
| Type | Description | Order number |
| PR 6021/00N | Load disc and base component, ground strap | 940536021001 |
| PR 6021/01N | Mounting kit (contains PR 6021/00N) | 940536021011 |
| PR 6021/02N | Upper and lower load disc with anti-rotation protection | 940536021021 |
| PR 6021/03N | Mounting kit incl. upper and lower load disc with anti-rotation protection | 940536021031 |
| PR 6021/04N | Upper (turbo) and lower load disc | 940536021041 |
| PR 6021/05N | Mounting kit incl. upper (turbo) and lower load disc | 940536021051 |
| PR 6021/06N | Upper (turbo) and lower load disc with anti-rotation protection | 940536021061 |
| PR 6021/07N | Mounting kit incl. upper (turbo) and lower load disc with anti-rotation protection | 940536021071 |
| Junction box | ||
| Type | Description | Order number |
| PR 6021/08 | Junction box for truck scale with up to 8 load cells PR 6221 | 940536021084 |
| PR 6021/18 | Junction box with potentiometers for truck scale with up to 8 load cells PR 6221 | 940536021184 |
| PR 6021/68S | Junction box for truck scale (Ex version), stainless steel with lightning protection | 940536021684 |
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