We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Two small metal network modems side by side

UOTEK

UOTEK 2577SM RS232 RS485 RS422 Single-Mode Fiber Modem Pair

SKU CH-Z8MY-MKJKN MPN 2577SM

A pair of single-mode fiber modems converting RS-232, RS-485 and RS-422 signals over distances up to 20 km at 460 kbps

  • Product typeGateway Modem
  • Extends serial links up to 20 km over single-mode fiber
  • Connects RS-232, RS-485 and RS-422 devices without extra converters
  • Supports half-duplex RS-485 and full-duplex RS-422 on the same link
  • Delivers up to 460 kbps on RS-485/422 and 115.2 kbps on RS-232
  • Matched UT-2577SM and UT-2578SM pair works together out of the box

Industrial Serial-to-Fiber Pair

This UOTEK modem pair converts RS-232, RS-485 and RS-422 signals for transmission over single-mode fiber. The UT-2577SM and UT-2578SM units must be used together to link remote terminal units with SCADA controllers or host systems. Mixed serial standards can operate simultaneously on the same link.

SCADA and RTU Integrators

Engineers extending serial networks up to 20 km over single-mode fiber will find the asynchronous protocol support and mixed-port flexibility useful. Sites requiring multi-mode fiber, Ethernet connectivity or standalone single-modem operation should look at other products.

20 km Single-Mode Reach

The decisive specification is the 20 km transmission distance on single-mode fiber with a maximum serial rate of 460 kbps for RS-485/422 and 115.2 kbps for RS-232. Select the SC, ST or FC interface option to match your patch-panel connectors.

How it compares

Measured against everything we stock in Cable Modems & Gateway Routers, at today’s prices. Recalculated every night.

Price $91.99
Cheaper than about 61% of the 122 comparable items (median $120.99).

Specifications

Product
Product typeGateway Modem

Questions about this item

Will the 2577SM modem pair work with my existing RS-232 and RS-485 equipment?

Yes, the 2577SM and 2578SM support asynchronous RS-232, RS-485 and RS-422 simultaneously. Ports with different electronic standards can be mixed and matched without issues.

How do I verify the 20 km single-mode link is operating at the rated 460 kbps?

The modems support asynchronous serial communication up to 460 kbps for RS-485/422 and 115.2 kbps for RS-232. Confirm the link by checking data throughput matches your configured baud rate.

Does the box include both the 2577SM and 2578SM units with SC, ST or FC connectors?

The package includes one UT-2577SM and one UT-2578SM. You must specify the required SC, ST or FC interface when ordering so the correct connectors are supplied.

More in Cable Modems & Gateway Routers

Similar items