BELDEN 9841
Low Capacitance Computer Cable for EIA RS-485 Applications
UL AWM Style No. 2919
Smar – RS-485
General Description:
24 AWG stranded (7×32) TC conductors, polyethylene insulation, twisted pairs, overall Beldfoil® (100%
coverage) + TC braid shield (90% coverage), 24 AWG stranded TC drain wire, PVC jacket.
Physical Characteristics (Overall)
Conductor
AWG:
| # Pairs | AWG | Stranding | Conductor Material |
| 1 | 24 | 7×32 | TC – Tinned Copper |
Total Number of Conductors: 2
Insulation
Insulation Material:
| Insulation Material | Wall Thickness (in.) |
| PE – Polyethylene | 0.023 |
Outer Shield
Outer Shield Material:
| Layer # | Outer Shield Trade Name | Type | Outer Shield Material | Coverage (%) |
| 1 | Beldfoil® (w/ shorting fold) | Tape | Aluminum Foil-Polyester Tape | 100 |
| 2 | Braid | TC – Tinned Copper | 90 |
Outer Shield Drain Wire AWG:
| AWG | Stranding | Drain Wire Conductor Material |
| 24 | 7x#32 | TC – Tinned Copper |
Outer Jacket
Outer Jacket Material:
| Outer Jacket Material | Nom. Wall Thickness (in.) |
| PVC – Polyvinyl Chloride | 0.035 |
Overall Cable
Overall Cabling Fillers: Fibrous Polypropylene
Overall Cabling Lay Length & Direction:
| Length (in.) | Direction | Twists (twist/ft) |
| 2.5 | Left Hand | 4.800 |
Overall Nominal Diameter: 0.232 in.
Pair
Pair Color Code Chart:
| Color |
| White/Blue and Blue/White |
Mechanical Characteristics (Overall)
- Operating Temperature Range: -30°C To +80°C
- Bulk Cable Weight: 36 lbs/1000 ft.
- Max. Recommended Pulling Tension: 72.300 lbs.
- Min. Bend Radius/Minor Axis: 2.500 in.
Applicable Specifications and Agency Compliance (Overall)
Applicable Standards & Environmental Programs
- NEC/(UL) Specification: CM
- NEC Articles: 800
- CEC/C(UL) Specification: CM
- AWM Specification: UL Style 2919 (30 V 80°C)
- EU Directive 2011/65/EU (ROHS II): Yes
- EU CE Mark: Yes
- EU Directive 2000/53/EC (ELV): Yes
- EU Directive 2002/95/EC (RoHS): Yes
- EU RoHS Compliance Date (mm/dd/yyyy): 01/01/2004
- EU Directive 2002/96/EC (WEEE): Yes
- EU Directive 2003/11/EC (BFR): Yes
- CA Prop 65 (CJ for Wire & Cable): Yes
- MII Order #39 (China RoHS): Yes
- Flame Test
- UL Flame Test: UL1685 UL Loading
- CSA Flame Test: FT1
- Suitability
- Suitability – Indoor: Yes
- Plenum/Non-Plenum
- Plenum (Y/N): No
- Plenum Number: 82841, 89841
Electrical Characteristics (Overall)
Nom. Characteristic Impedance:
| Impedance (Ohm) |
| 120 |
Nom. Capacitance Conductor to Conductor:
| Capacitance (pF/ft) |
| 12.8 |
Nom. Capacitance Cond. to Other Conductor & Shield:
| Capacitance (pF/ft) |
| 23 |
Nominal Velocity of Propagation:
| VP (%) |
| 66 |
Nominal Delay:
| Delay (ns/ft) |
| 1.6 |
Nom. Conductor DC Resistance:
| DCR @ 20°C (Ohm/1000 ft) |
| 24 |
Nominal Outer Shield DC Resistance:
| DCR @ 20°C (Ohm/1000 ft) |
| 3.4 |
Nom. Attenuation:
| Freq. (MHz) | Attenuation (dB/100 ft.) |
| 1 | 0.6 |
Max. Operating Voltage – UL:
| Voltage | Description |
| 300 V RMS | Type CM |
| 30 V RMS | AWM2919 |
Max. Recommended Current:
| Description | Current |
| 10C temperature rise | 2.1 Amps per conductor @ 25°C ambient |
Put Ups and Colors:
| Item # | Putup | Ship Weight | Color | Notes | Item Desc |
| 9841 060100 | 100 FT | 4.300 LB | CHROME | 1 PR #24 PE SH PVC | |
| 9841 0601000 | 1,000 FT | 40.000 LB | CHROME | C | 1 PR #24 PE SH PVC |
| 9841 06010000 | 10,000 FT | 380.000 LB | CHROME | C | 1 PR #24 PE SH PVC |
| 9841 060500 | 500 FT | 20.000 LB | CHROME | C | 1 PR #24 PE SH PVC |
| 9841 0605000 | 5,000 FT | 200.000 LB | CHROME | 1 PR #24 PE SH PVC |
DATA SHEET
