| Parameter | Unit of measure | Specification | ||||||||
| Type | Precision Junction Box | Precision Junction Boxes ATEX | ||||||||
| Model No. | AJB540S | AJB641S | AJB841S | AJB541M | AJB540L | AJB941M | AJB641SX | AJB841SX | ||
| Size | Small | Medium | Large | Medium | Small | |||||
| Application | Standard | High corrosion | Large size | Conduit | Hygienic | Hazardous | Hazardous, high corrosion | |||
| Hygienic approvals | NSF and GMP certified | |||||||||
| Item No. | 30206112 | 30206108 | 30070226 | 30206111 | 30206113 | 30219978 | 30070224 | 30070225 | ||
| No. of load cells | 2, 3, 4 | |||||||||
| Load cell resistance range | Ω | 120 - 1200 | 120 - 4000 | 120 - 1200 | 120 - 1200 | |||||
| Shift adjustment |
Method | Encoding rotary switches with precision discrete resistors | ||||||||
| Inital Error 1) | < 1/6000 | |||||||||
| Range (nominal) | % | 1.3 | 1.3 (3.5 extended @ 1000Ω) |
1.3 | ||||||
| Number of steps | 256 | |||||||||
| Smallest adjustment step | 1/19000 | |||||||||
| Shift adjustment methods available |
On-load – Adjustment without calculation similar to trim pot adjustment | |||||||||
| Inital – Compensation of multiple junction box connection | ||||||||||
| Pair/Section shift adjustment | Yes | |||||||||
| Legal for trade sealing | Sealing wire or sticker | |||||||||
| Temperature range | Operating | -30 ~ +65 (-4 ~ +150) | -30 ~ +60 (-4 ~ +140) | |||||||
| Safe storage | -40 ~ +80 (-40 ~ +176) | |||||||||
| Excitation voltage | Recommended | V AC/DC | 10 | |||||||
| Max. | 20 | 17.4 | ||||||||
| Insulation resistance @50VDC | MΩ | > 5000 | ||||||||
| Breakdown voltage | V AC | > 500 | ||||||||
| Earthing/ Grounding |
Via mounting screws | Dedicated stud | Via mounting screws | Dedicated stud | Via mounting screws | Optional - not required | ||||
| ATEX approval 4) |
Number, Cat. 2 | DEKRA 03ATEX1396X | ||||||||
| Ratings, Cat. 2 | II 2 G Ex ia IIC T4 Gb II 2D Ex ib IIIC T70 °C … T90 °C Db |
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| Entity parameters, Cat. 2 | Ui = 17.3V, Ii = 300mA, Pi = 1.2W, Ci=Li= 0 Ui = 6.0V, Ii = 200mA, Pi = 1.2W, Ci=Li=0 |
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| Number, Cat. 3 | DEKRA 03ATEX1397X | |||||||||
| Ratings, Cat. 3 | II 3 G Ex ic IIC T4 Gc II 3 G Ex nA IIC T4 Gc II 3 D Ex tc IIIC T70 °C … T90 °C Dc |
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| Entity parameters, Cat. 3 | Ui = 30V, Ii = 1A Ui = 10.5V, Ii = 500mA, Ci=0, Li=0 |
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| IECEx approval 4) |
Number | IECEx DEK 17.0047X | ||||||||
| Ratings |
Ex ia IIC T4 Gb, Ex ic IIC T4 Gc, Ex nA IIC T4 Gc Ex ib IIIC T70 °C … T90 °C Db, Ex tc IIIC T70 °C … T90 °C Dc |
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| Material |
Enclosure | Stainless steel | Stainless steel 316 |
Stainless steel | Stainless steel, FDA certified | Stainless steel | Stainless steel 316 | |||
| Cable entry fitting | Polyamide (Nylon) | Nickel plated brass | Polyamide (Nylon) |
Carbon steel, zinc plated | Stainless steel | Polyamide (Nylon) |
Nickel plated brass | |||
| Protection | Type | Rubber gasket | Silicon | Rubber gasket | ||||||
| IP rating | IP65 | IP69K | IP65 | IP69K | IP69K | |||||
| NEMA rating | NEMA 4/4X | |||||||||
| Weight, nominal | kg (lb) | 1.1 | 1.2 | 1.7 | 3.8 | 3.0 | 1.2 | |||
| Load cell cable | No. conductors | 4 and 6 + Shield | ||||||||
| Conductor size | mm2 (AWG) | ≤ 3 (12) | ||||||||
| Diameter | mm (in) | 4-8 (0. 16-0.32) | 3-6.5 (0. 12-0.26) | 4.8-6.5 (0. 19-0.26) | "5.0-5.4 (0. 197-0.21)" | 3-6.5 (0. 12-0.26) | ||||
| Home-Run and AUX cable |
No. conductors | 6 + Shield | ||||||||
| Conductor size | mm2 (AWG) | ≤ 3 (12) | ||||||||
| Diameter | mm (in) | 6- 12 (0.24-0.48) | 4-8 (0. 16-0.32) | 6.4-9.5 (0.25-0.48) | 5.8- 10.4 (0.23-0.41) | 4- 10 (0. 16-0.4) | ||||
| Extension via AUX port |
Possible | No | Yes | No | Yes | Yes | ||||
| Max. no. of load cells for 1st box | - |
4 | - |
4 | 4 | |||||
| AUX cable max. recommended wire resistance 2) | Ω | 0.5 | 1.5 | 0.5 | 0.5 | |||||
| AUX cable max. recommended length of 0. 14mm2 (AWG24) 2) | m (ft) | 2.5 (8.3) | 8 (26) | 2.5 (8.3) | 2.5 (8.3) | |||||
| AUX cable max. recommended length of 0.5mm2 (AWG20) | m (ft) | 10 (33) | 30 (100) | 10 (33) | 10 (33) | |||||
| CalFree™ calibration without test weights |
Suitable 3) | Yes | ||||||||
| Impact of J box on signal | % | < 0. 1% | ||||||||
| AUX cable max. recommended wire resistance for CalFree™ | Ω | - |
0.05 | - |
0.05 | 0.05 | ||||
| AUX cable max. recommended length of 0.5mm2 (AWG20) | m (ft) | 1.5 (5) | 1.5 (5) | 1.5(5) | ||||||
