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Brainboxes ES Series Ethernet to Serial Adaptors

Brainboxes Brand: Brainboxes

The Brainboxes ES Series of Ethernet to serial adaptors includes models with screw terminals or 9-pin D connectors as well as models offering PoE (Power over Ethernet).

  • Ethernet to serial adaptors
  • 1 to 8 outputs
  • RS232 and RS422/485 outputs
  • Range includes PoE models
  • Industrial and DIN rail mount models
  • Brainboxes ES Series
Description Image Product Buy Pricing (Ex VAT) Number of Outputs Output Type(s) Removable Input Type Number of Inputs
Brainboxes ES-020 Ethernet 1 Port RS232 10xScrew Terminals
Brainboxes ES-020 Ethernet 1 Port RS232 10xScrew Terminals
Standard range
Order code: 43-1274
MPN: ES-020

Available to back orderBack-order availability date - 05/04/2026
1+ £145.36
Price per unit Ex VAT 		1 RS232 Ethernet 1
Brainboxes ES-246 1 Port RS232 Ethernet to Serial Adapter
Brainboxes ES-246 1 Port RS232 Ethernet to Serial Adapter
Standard range
Order code: 43-1266
MPN: ES-246

3 in stock, despatched same dayAdditional quantity lead time 2 days
1+ £88.14
Price per unit Ex VAT 		1 RS232 Ethernet 1
Brainboxes ES-701 4 Port RS232 Ethernet to Serial Adapter
Brainboxes ES-701 4 Port RS232 Ethernet to Serial Adapter
Standard range
Order code: 43-1272
MPN: ES-701

Available to back orderBack-order availability date - 05/04/2026
1+ £305.90
Price per unit Ex VAT 		4 RS232 Ethernet 1
Brainboxes ES-279 8 Port RS232 Ethernet to Serial Adapter
Brainboxes ES-279 8 Port RS232 Ethernet to Serial Adapter
Standard range
Order code: 43-1270
MPN: ES-279

1 in stock, despatched same dayAdditional quantity lead time 2 days
1+ £466.62
Price per unit Ex VAT 		8 RS232 Ethernet 1
Brainboxes ES-320 1 Port RS422/485 Ethernet to Serial Adapter
Brainboxes ES-320 1 Port RS422/485 Ethernet to Serial Adapter
Standard range
Order code: 43-1269
MPN: ES-320

Available to back orderBack-order availability date - 05/04/2026
1+ £97.48
Price per unit Ex VAT 		1 RS422 / 485 Ethernet 1
Brainboxes ES-346 4 Port RS422/485 Ethernet to Serial Adapter
Brainboxes ES-346 4 Port RS422/485 Ethernet to Serial Adapter
Standard range
Order code: 43-1271
MPN: ES-346

Available to back orderBack-order availability date - 05/04/2026
1+ £339.64
Price per unit Ex VAT 		4 RS422 / 485 Ethernet 1
Brainboxes ES-842 8 Port RS422/485 Ethernet to Serial Adapter
Brainboxes ES-842 8 Port RS422/485 Ethernet to Serial Adapter
Standard range
Order code: 43-1273
MPN: ES-842

1 in stock, despatched same dayAdditional quantity lead time 2 days
1+ £496.39
Price per unit Ex VAT 		8 RS422 / 485 Ethernet 1
Brainboxes ES-446 1 Port RS232 PoE Ethernet to Serial Adapter
Brainboxes ES-446 1 Port RS232 PoE Ethernet to Serial Adapter
Standard range
Order code: 43-1264
MPN: ES-446

Available to back orderBack-order availability date - 05/04/2026
1+ £119.25
Price per unit Ex VAT 		1 RS232 Ethernet 1
Brainboxes ES-457 2 Port RS232 PoE Ethernet to Serial Adapter
Brainboxes ES-457 2 Port RS232 PoE Ethernet to Serial Adapter
Standard range
Order code: 43-1265
MPN: ES-457

Available to back orderBack-order availability date - 05/04/2026
1+ £169.03
Price per unit Ex VAT 		2 RS232 Ethernet 1
Brainboxes ES-420 1 Port RS422/485 PoE Ethernet to Serial Adapter
Brainboxes ES-420 1 Port RS422/485 PoE Ethernet to Serial Adapter
Standard range
Order code: 43-1263
MPN: ES-420

Available to back orderBack-order availability date - 05/04/2026
1+ £128.59
Price per unit Ex VAT 		1 RS422 / 485 Ethernet 1
Brainboxes ES-413 2 Port RS422/485 PoE Ethernet to Serial Adapter
Brainboxes ES-413 2 Port RS422/485 PoE Ethernet to Serial Adapter
Standard range
Order code: 43-1262
MPN: ES-413

Available to back orderBack-order availability date - 05/04/2026
1+ £169.03
Price per unit Ex VAT 		2 RS422 / 485 Ethernet 1
Brainboxes ES-511 Industrial Ethernet to Serial 1xRS232/422/485
Brainboxes ES-511 Industrial Ethernet to Serial 1xRS232/422/485
Standard range
Order code: 43-1276
MPN: ES-511

Available to back orderBack-order availability date - 05/04/2026
1+ £245.58
Price per unit Ex VAT 		1 RS232 / 422 / 485 terminal blocks Ethernet 1
Brainboxes ES-522 Industrial Ethernet to Serial 2xRS232/422/485
Brainboxes ES-522 Industrial Ethernet to Serial 2xRS232/422/485
Standard range
Order code: 43-1277
MPN: ES-522

Available to back orderBack-order availability date - 05/04/2026
1+ £287.39
Price per unit Ex VAT 		2 RS232 / 422 / 485 Ethernet 1
Brainboxes ES-551 Isolated Industrial Ethernet to Serial 1xRS232/422/485
Brainboxes ES-551 Isolated Industrial Ethernet to Serial 1xRS232/422/485
Standard range
Order code: 43-1278
MPN: ES-551

Available to back orderBack-order availability date - 05/04/2026
1+ £285.17
Price per unit Ex VAT 		1 RS232 / 422 / 485 Ethernet 1
Brainboxes ES-571 Isolated Industrial Ethernet to Serial1xRS232/422/485+Ethernet
Brainboxes ES-571 Isolated Industrial Ethernet to Serial1xRS232/422/485+Ethernet
Standard range
Order code: 43-1279
MPN: ES-571

Available to back orderBack-order availability date - 05/04/2026
1+ £329.18
Price per unit Ex VAT 		1 RS232 / 422 / 485 Ethernet 1
DescriptionNo. of portsTypeStyleBrainboxes typeOrder code
Ethernet to Serial Adaptor 1 Port RS2321RS232Screw terminalsES-02043-1274
Ethernet to Serial Adaptor 1 Port RS232 & 1 Port RS422/4852RS232 + RS422/485Screw terminalsES-35743-1275
Ethernet to Serial Adapter 1 Port RS2321RS2329-pin D connectorES-24643-1266
Ethernet to Serial Adapter 2 Port RS2322RS2329-pin D connectorES-25743-1267
Ethernet to Serial Adaptor 4 Port RS2324RS2329-pin D connectorES-70143-1272
Ethernet to Serial Adaptor 8 Port RS2328RS2329-pin D connectorES-27943-1270
Ethernet to Serial Adapter 1 Port RS422/4851RS422/4859-pin D connectorES-32043-1269
Ethernet to Serial Adaptor 4 Port RS422/4854RS422/4859-pin D connectorES-34643-1271
Ethernet to Serial Adaptor 8 Port RS422/4858RS422/4859-pin D connectorES-84243-1273
PoE Ethernet to Serial Adapter 1 Port RS2321RS232Power over EthernetES-44643-1274
PoE Ethernet to Serial Adapter 2 Port RS2322RS232Power over EthernetES-45743-1265
PoE Ethernet to Serial Adapter 1 Port RS422/4851RS422/485Power over EthernetES-42043-1263
PoE Ethernet to Serial Adapter 2 Port RS422/4852RS422/485Power over EthernetES-41343-1262
Ethernet to Serial Adaptor 1 Port RS232/RS422/RS4851RS232/422/485Ind. Ethernet to SerialES-51143-1276
Ethernet to Serial Adaptor 2 Port RS232/RS422/RS4852RS232/422/485Ind. Ethernet to SerialES-52243-1277
Ethernet to Serial Adaptor 1 Port RS232/RS422/RS485 Galvanic Isolation1RS232/422/485Ind. Ethernet to SerialES-55143-1278
Ethernet to Serial Adaptor 1 Port RS232/RS422/RS485 Galvanic Isolation with Ethernet Switch1RS232/422/485Ind. Ethernet to SerialES-57143-1279


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