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Black industrial RS-232 to RS-422 converter with DB9 female, DB9 male and terminal block

GearMo

GearMo GM-1005A-B RS-232 to RS-422 Converter with Terminal Block

SKU CH-MZB0-WGQ31

Converts RS-232 signals to RS-422 for 1.2 km transmission at up to 115.2 kbps using terminal block connections

  • Product colorBlack
  • Extends serial links to 1.2 km with RS-422 differential signalling
  • Zero-delay auto direction control removes RTS/DTR handshake needs
  • Port-powered charge-pump design needs no external supply
  • Full-duplex async operation at 300-115.2 kbps
  • Connects DB9 female RS-232 to DB9 male RS-485 and terminal block

Industrial RS-232 to RS-422 Converter

The GearMo GM-1005A-B converts RS-232C signals into balanced differential RS-422 signals for long-distance serial communication. It extends the effective transmission range to 1.2 km using twisted-pair or shielded cable. The adapter operates in asynchronous full-duplex mode at baud rates from 300 to 115.2 kbps without requiring external power.

Suited for legacy equipment integration

Engineers connecting PC serial ports to SCM devices, access control panels, or ATM systems will find the zero-delay auto-transceive function valuable. It requires no RTS or DTR handshake signals and runs existing RS-232 software without modification. Buyers needing RS-485 multi-drop networking or isolated signal protection should look at alternative converter types.

Terminal block and DB9 connectivity

The unit provides an RS-232 DB9 female port alongside an RS-485 DB9 male port and screw-terminal block for flexible wiring. This combination supports point-to-point and point-to-multipoint topologies in parking, bus charging, and all-in-one card systems. The built-in charge pump draws power directly from the RS-232 line without port initialization.

How it compares

Measured against everything we stock in USB Adapter Cables & Dongles, at today’s prices. Recalculated every night.

Price $19.99
Pricier than about 70% of the 1,430 comparable items (median $14.99).

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Specifications

Product
Brand nameGearmo
Model nameGM-1005A-B
Product colorBlack

Questions about this item

What is the maximum baud rate this converter supports?

The converter handles asynchronous full-duplex transmission from 300bps up to 115.2kbps, so you can match the speed your existing serial equipment requires without changing software.

How far can I run the RS-422 link compared with the RS-232 side?

RS-422 differential signalling reaches 1,200m over twisted-pair or shielded cable, while the RS-232 port is limited to 5m, letting you extend a legacy serial connection across a factory floor.

Does the DB9 male connector carry RS-422 or RS-485 signals?

The male DB9 is wired for RS-422 full-duplex operation; the terminal block provides the same balanced differential pairs for screw-terminal wiring in industrial panels.

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