Name: Predision HESC-T-026 Photoelectric Isolated RS-232 to RS-485/422 Converter
Brand: Predision
Price: 173.00 USD
Availability: OutOfStock

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Predision HESC-T-026 Photoelectric Isolated RS-232 to RS-485/422 Converter 1

Predision HESC-T-026 Photoelectric Isolated RS-232 to RS-485/422 Converter 2

Predision HESC-T-026 Photoelectric Isolated RS-232 to RS-485/422 Converter

Manufacturer Part Number: HESC-T-026

Brand: Predision

$ 173.00

Operating Temperature: -40°C to 85°C
±15 kV ESD Protection (RS-232), 1,500 W Lighting and Surge Protection per wire (RS-485/422)
Isolation Voltage: 2,500 Vrms, 500 VDC (Continuous)
Supports Connection of up to 128 RS-422 or RS-485 Devices

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More stock available: May 29, 2026 (UTC-4)

The HESC-T-026 is a high-performance, photoelectric isolated interface converter, fully compliant with RS-232C, RS-422, and RS-485 standards. It is engineered to convert single-ended RS-232 signals into balanced differential RS-422 or RS-485 signals with maximum industrial-grade protection.

Designed for the most demanding electrical environments, the HESC-T-026 features an integrated photoelectric isolator providing up to 2,500 Vrms of isolation voltage. To safeguard against high-energy transients, the RS-485/422 interfaces are equipped with advanced TVS (Transient Voltage Suppressors). This protection system provides a robust 1,500W of lightning and surge protection per wire, effectively clamping instantaneous over-voltage from all sources. Low inter-electrode capacitance ensures that even with this high level of protection, high-speed data transmission remains clear and stable.

The HESC-T-026 is built for large-scale, point-to-multipoint industrial networks. A single converter can support up to 128 RS-422 or RS-485 devices across a wide range of baud rates, from 300 bps to 115.2 kbps.

Standard	EIA/TIA RS-232C, RS-485/422
Electrical Interface	DB9 Female (RS-232), DB9 Male and RJ45 Connector (RS-485/422)
Interface Protection	±15 kV ESD Protection (RS-232), 1,500 W Lighting and Surge Protection per wire (RS-485/422)
Isolation Voltage	2,500 Vrms, 500 VDC (Continuous), Dedicated DC/DC Module
Operating Mode	Asynchronous Half-duplex or Full-duplex
Signal Indicators	Three LEDs for Power (PWR), Transmit (TXD) and Receive (RXD)
Transmission Media	Twisted-pair (UTP) or Shielded Cable (STP)
Baud Rate	300 bps - 115.2 kbps
Dimension	97 × 65 × 22 mm
Operating Temperature	-40°C to 85°C
Relative Humidity	5 - 95%
Transmission Distance	5,000m (at 9,600 bps)

HESC-T-018

RS-232 to RS-485/422 Converter, with 5-pin Terminal Block, Screw-fixed Plastic Housing, Baud Rate: 300 - 115,200 bps, Power: Port-Powered, Jumper-free Asynchronous Full-Duplex (RS-422) or Half-Duplex (RS-485) with Intelligent Mode Detection, Transmission Distance: 1,200m (RS-485/422), 5m (RS-232), Operating Temperature: -25℃ to 70℃.

HESC-T-019

RS-232 to RS-485/422 Converter, with 6-pin Terminal Block, Screw-fixed Plastic Housing, Baud Rate: 300 - 115,200 bps, Power: Port-Powered, Jumper-free Asynchronous Full-Duplex (RS-422) or Half-Duplex (RS-485) with Intelligent Mode Detection, Transmission Distance: 1,200m (RS-485/422), 5m (RS-232), 2kA Lightning Surge Protection, Operating Temperature: -40℃ to 85℃.

HESC-T-020

RS-232 to RS-485/422 Port-Powered Converter with Photoelectric Isolation, Aluminum Enclosure, Wall Mounted, Baud Rate: 300 bps - 115.2 kbps, Transmission Distance: 1,200m (RS-485/422); 5m (RS-232), ±15 kV ESD Protection, 600 W Lighting and Surge Protection per wire, Operating Temperature: -25℃ to 70℃.

HESC-T-021

RS-232 to RS-485/422 Port-Powered Converter with Photoelectric Isolation, Plastic Housing, Baud Rate: 300 bps - 115.2 kbps, Transmission Distance: 1,200m (RS-485/422); 5m (RS-232), ±15 kV ESD Protection, 600 W Lighting and Surge Protection per wire, Operating Temperature: -40℃ to 85℃.

HESC-T-022

RS-232 to RS-485/422 Port-Powered Photoelectric Isolated Converter with 10-pin Terminal Block (RS-485/422), Baud Rate: 300 bps - 115.2 kbps, Transmission Distance: 1,200m (RS-485/422); 5m (RS-232), ±15 kV ESD Protection, 600 W Lighting and Surge Protection per wire, Operating Temperature: -40℃ to 85℃.

HESC-T-023

RS-232 to RS-485/422 Converter, Metal Housing, Wall Mounted, Transmission Distance: 1,200m (RS-485/422); 5m (RS-232), 600 W Lighting and Surge Protection per wire, Operating Temperature: -25℃ to 70℃.

HESC-T-024

RS-232 to RS-485/422 Photoelectric Isolated Converter, Metal Housing, Baud Rate: 300 bps - 115.2 kbps, Transmission Distance: 1,200m (RS-485/422); 5m (RS-232), Isolation Voltage: 2,500 Vrms, 500 VDC (Continuous), 600 W Lighting and Surge Protection per wire (RS-485/422), Operating Temperature: -25℃ to 70℃.

HESC-T-025

Industrial RS-232 to RS-485/422 Photoelectric Isolated Converter, Baud Rate: 300 bps - 115.2 kbps, Supports Connection of up to 128 RS-485 or RS-422 Devices, Transmission Distance: 5,000m (at 9,600 bps), Isolation Voltage: 2,500 Vrms, 500 VDC (Continuous), 600 W Lighting and Surge Protection per wire, Operating Temperature: -40℃ to 85℃.

HESC-T-026

Industrial RS-232 to RS-485/422 Photoelectric Isolated Converter, Baud Rate: 300 bps - 115.2 kbps, Supports Connection of up to 128 RS-485 or RS-422 Devices, Transmission Distance: 5,000m (at 9,600 bps), Isolation Voltage: 2,500 Vrms, 500 VDC (Continuous), 1,500 W Lighting and Surge Protection per wire, Operating Temperature: -40℃ to 85℃.

HESC-T-027

RS-232 to RS-485/422 Photoelectric Isolated Converter, Wall Mounted, Baud Rate: 300 bps - 115.2 kbps, Transmission Distance: 1,200m (at 9,600 bps), Isolation Voltage: 2,500 Vrms, 500 VDC (Continuous), 600 W Lighting and Surge Protection per wire (RS-485/422), Operating Temperature: -25℃ to 70℃.

HESC-T-028

Industrial RS-232 to RS-485/422 Converter with Optical Isolation, Baud Rate: 300 - 115,200 bps, Transmission Distance: 5,000m (at 9,600 bps), Isolation Voltage: 2,500 Vrms, 500 VDC (Continuous), ±15 kV ESD Protection (RS-232), 600 W Lighting and Surge Protection per wire (RS-485/422), Operating Temperature: -40℃ to 85℃.

Datasheet ： Predision_Serial_Converter_HESC-T-026_DS_EN.pdf

LineCard： Predision_Line_Card_M2M_Connectivities.pdf

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