(English) IT-SC4485I-PSW


IT-SC4485I-PSW (12/48VDC) is RS-485 HUB is designed for RS-485 system in complicated electromagnetic environment. It supports a transmission rate up to 115.2KBPS, and adopts two-way transparent transmission, which allows one RS-485 bus or one RS-232 bus to be divided into 4 RS-485 buses, or any divided RS-485 signal to be transparently transmitted to host computer RS-485 or RS-232 hub. Each RS-485 port of slave computer is provided with reverse connection alarm and protection function, with which the reliability of existing RS-485 network is greatly improved, effectively reducing the network maintenance time. To ensure the security and reliability of data communication, the RS-485 ports are provided with 2KVAC isolation protection, level-4 electrostatic protection and level-2 radiated susceptibility, effectively preventing surge current, common ground and radiated interference, making the hub safe and reliable and suitable for outdoor application. IT-SC4485I-PSW (12/48VDC) also comes with RS-485 bus star connection. Users can easily improve RS-485 bus structure and divide the network segment. Proper utilization of IT-SC4485I-PSW (12/48VDC) can help design a unique and reliable RS-485 system.  IT-SC4485I-PSW (12/48VDC) adopts EMC protection and supports DIN-rail installation, allowing it to be used reliably in severe environment at a temperature of -40℃~75℃.



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    1. Support two host computer RS-232 and RS-485 ports and four slave computer RS-485 ports
    2. Support transmission rate 300~115200bps
    3. Support multiple IT-SC4485I-PSW (12/48VDC) cascade connection as many as 256-way RS-485 bus
    4. Each slave computer port can connect 32 standard RS-485 devices (nodes)
    5. Special automatic reverse connection alarm
    6. Zero-delay automatic send/receive conversion function
    7. Port is provided with 2KVAC isolation protection,Level-4 electrostatic protection and level-2 radiated susceptibility
    1. Industrial design, IP40 protection
    2. Support DIN-rail installation
    3. Working temperature -40~75℃




Communication Parameters

Interface Protocol: compliant with EIARS-232/485

Serial port number: 1 host computer RS-232 port, 1 host computer

RS-485 port, 4 slave computer RS-485 ports

RS-232 signal: TxD, RxD, GND

RS-485 signal: D+, D-, GND

Parity bit: None, Even, Odd, Space, Mark

Data bit: 5bit, 6bit, 7bit, 8bit

Stop bit: 1bit, 1.5bit, 2bit

Baud rate: 300bps~115200bps

Direction control: RS-485 adopts ADDC technology

Transmission media: CAT.5E shielded twisted pair or dedicated line for RS-485

Load capacity: support 32 nodes (customizable to 128 nodes) polling

Port protection: 2KVAC isolation protection, level-4 electrostatic protection, level-2 radiated susceptibility

Transmission distance: RS-485 1200m, RS-232 is less than 15m


Host computer RS-232/485: 5PIN terminal blocks

Slave computer RS-485: 10PIN terminal blocks


PWR: Power indicator

TXD: Host computer serial port data sending status indicator

RXD: Host computer serial port data receiving status indicator

1~4: Slave computer RS-485 port status indicator


Input voltage: 12-48VDC

Load power: 0.7W@24VDC

Mechanical structure

Shell: IP40 protection, high-strength metal shell

Installation: DIN-rail installation

Weight: 384.8g

Dimension (L*W*H): 110mm*95mm*35mm

Working environment

Working temperature: -40~75℃

Storage temperature: -40~85℃

Humidity: 5%~95% (no condensation)

Industry standard

EMI : FCC Part 15, CISPR (EN55022) class A

EMS : EN61000-4-2 (ESD), Level 4

EN61000-4-3 (RS), Level 2

Shock : IEC 60068-2-27

Free fall: IEC 60068-2-32

Vibration test : IEC 60068-2-6

CE, FCC, RoHS, UL508 (Pending)
3 years
Packing List

  1. IT-SC4485I-PSW (12~48VDC) (plus terminal block) ×1
  2. User manual ⅹ 1
  3. Certificate of quality ⅹ 1
  4. Warranty card ⅹ 1

Manuale Prodotto

Datasheet Prodotto

Intellisystem Technologies