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RS20-0800M2T1SDAUHC cannot directly replace RS20-0800M2T1TDAUWVV.
There are critical differences in software functions, protection level and certifications between the two models. Direct replacement will result in failure to meet the core requirements of the original application.
- Key Differences Comparison
| Article | Original Model RS20-0800M2T1TDAUWVV | Replacement Model RS20-0800M2T1SDAUHC | Impact |
| Software Level | TDA (Layer 2 Enhanced Management) | SDA (Layer 2 Basic Management) | Key functions such as VLAN, IGMP snooping, HIPER-Ring/MRP ring redundancy, RSTP/MSTP are missing, greatly reducing network reliability and manageability |
| Special Protection | WVV (Conformal coating) | HC (High protection/dustproof, typically IP65/IP67 or dedicated dust rating) | Different coating types: WVV focuses on moisture and corrosion resistance, while HC focuses on dust protection; they are not fully equivalent |
| Hazardous Location Certification | Class I Div 2 (suffix A) | Not certified | Not suitable for flammable and explosive hazardous areas such as petrochemical and mining sites |
| Température de fonctionnement | -40…+70°C (wide temperature range) | Normally 0…+60°C (standard temperature) | Cannot adapt to extreme temperature environments such as outdoor and vehicle-mounted applications |
- Recommandations de remplacement
For a full replacement, select a model with matching functions, protection and certifications. Priority recommendations:
RS20-0800M2T1TDAUWVV (identical model, ensures all specifications match)
If uplink ports need adjustment, choose models in the same series with enhanced management, wide temperature and conformal coating, tel que:
RS20-0800S2T1TDAUWVV (single-mode fiber instead of multimode)
RS20-0800M2M2TDAUWVV (dual fiber uplinks)
- Notes de sélection
Before replacement, confirm the mandatory requirements for ring redundancy, hazardous location certification and wide temperature range on site.
If only basic connectivity is required without ring network or hazardous area needs, RS20-0800M2T1SDAUHC may be considered, but network design and environmental compliance must be re-evaluated.
The core attributes of RS20-0800M2T1TDAUWVV are:
8 ports, Layer 2 enhanced management (TDA), 1 multimode fiber + 1 copper uplink, wide temperature (-40°C), Class I Div 2 approval, WVV conformal coating.
Below is a precise list of alternatives in four categories: direct equivalent, function downgrade, port variant, cross-series upgrade (sorted by recommendation).
- Direct Equivalent Replacements in the Same Series (1:1, risk-free)
- Identical Standard Model (Premier choix)
RS20-0800M2T1TDAUWVV
Numéro de commande: 943434-365
Matches: TDA enhanced + U wide temp + A hazardous location + WVV coating
- Similar Specs, Minor Coating/Certification Adjustment (Second Choice)
RS20-0800M2T1TDAUHC
Difference: HC dustproof replaces WVV conformal coating; no Class I Div 2 attestation
Application: Non-hazardous areas, high dust, moderate humidity
Numéro de commande: 943434-265HC
RS20-0800M2T1TDAU
Difference: No WVV coating, no Class I Div 2 attestation
Application: General wide-temperature industrial environments
Numéro de commande: 943434-165
- Port Variant Replacements in the Same Series (Different uplinks, otherwise identical)
- Dual Copper Uplinks (No Fiber)
RS20-0800T1T1TDAUWVV
Uplink: 2×RJ45 copper ports
Numéro de commande: 943434-375
- Dual Multimode Fiber Uplinks (No Copper)
RS20-0800M2M2TDAUWVV
Uplink: 2×M2 multimode SC fiber ports
Numéro de commande: 943434-385
- Single-Mode Fiber (Long Distance)
RS20-0800S2T1TDAUWVV
Uplink: 1×S2 single-mode SC fiber port + 1×T1 copper port
Numéro de commande: 943434-395
- Function-Downgraded Replacements in the Same Series (Cost/stock compromise)
- Basic Management (SDA)
RS20-0800M2T1SDAUWVV
Software: SDA Basic (no ring/VLAN/IGMP)
Numéro de commande: 943434-364
- Standard Temperature (E)
RS20-0800M2T1TDAEWVV
Température: 0~60°C (non-wide temperature)
Numéro de commande: 943434-065WVV
- Basic Management + Standard Temperature
RS20-0800M2T1SDAEWVV
Numéro de commande: 943434-064WVV
- Cross-Series Upgrade Replacements (RS20 discontinued/upgrade)
- RS32 Series (with Gigabit, recommandé)
RS32-0800M2T1TDAUWVV
8×FE + 2×Gigabit SFP, Layer 2 enhanced, wide temp, hazardous location certified, coated
Compatible with RS20 configuration, dimensions and power supply
- MICE/SPIDER Series (compact/unmanaged)
MS20-0800M2T1TDAUWVV (modular)
SPIDER 8TX/1FX M2 TD AU WVV (unmanaged)
- Quick Risk Assessment (Critical Items Must Match)
✅ Must match: TDA enhanced, U wide temp, A hazardous location, WVV coating
⚠️ Downgrade risks:
SDA → loss of ring network/VLAN/IGMP
E → not suitable for -40°C environments
No A → prohibited in petrochemical/mining hazardous areas
No WVV → prone to failure in high humidity/corrosive conditions
- Final Selection Advice
- 1:1 replacement → RS20-0800M2T1TDAUWVV (943434-365)
- No explosion protection / high dust → RS20-0800M2T1TDAUHC
- Long-distance fiber → RS20-0800S2T1TDAUWVV
- Gigabit upgrade → RS32-0800M2T1TDAUWVV
