1.Interface features: compatible with RS-232C and RS-485standards of EIA/TIA.

2.Electric interface: RS-232Cinterface for the 1st -3rd pins of the 5-PIN terminals, and RS-485 interface for the 4th 5th pins of the 5-PIN terminals.

3.Transmission media: twisted-pair cable or shielded cable.

4.Working mode: asynchronous half-duplex.

 5.signal indicator including power (PWR), send (TXD), receive (RXD) and failure (E1-E8).

 6.isolation voltage of 2,500VRMS 500VDC non-stop and DC/DC isolation module.

7.Transmission rate: 300BPS-115.2K.

8.Protection grade: RS-232 interface 15KV ESD protection, RS-485 interface 1,500W lighting strike surge protection for each line.

9.Transmission distance: 0-5km (115,200-300BPS)

10.Measurements: 210mmX130mmX33mm

11.Working environment: -40℃ to 80℃, relative humidity 5% to 95%.

Board and the signal indication of the product
HK-5112 's front panel there are 11 indicators , there is a 5PLN rear panel terminals to RS-485, RS-232 input terminals 8 3PLN of eight port is optically isolated input.

4, The electrical interface and their definitions

1. RS-232/RS485 input interface definition

2. RS-485Pin Define:

HK-5112 eight RS-485 Hub Application
Master serial (RS-232C) to eight high-reliability applications RS-485 interface

485 have been extended to eight high-reliability applications RS-485 interface, RS-485 bus at the same time in parallel 128 RS-485 hub.

Master serial (RS-232C) to multiple high-reliability applications RS-485 interface. Or have been extended to more than 485 high-reliability applications RS-485 interface, RS-485 bus at the same time in parallel 128 RS-485 hub.

RS-485 port failure warning and protection
RS-485 port fault alarm and protection is the solution to connect multiple RS-485 devices , an effective way to enhance its reliability , HK-5112 has four lower machine ports, and each port has short circuit protection, and can work in shutdown mode. When either an RS-485 port circuit only affects its RS-485 bus system , does not affect other RS-485 interface connection system to work properly, the user can quickly determine fault warning light failed port and other connected faulty equipment .

Power and lightning protection
HK-5112 uses a small external power supply specifications for DC9-48V/350MA, refrain from casual users to use other without the pressure steady power supply to avoid damage to the product .
HK-5112 for all RS-485 interface has a 1500W lightning protection , can effectively inhibit the Lightning (lighting) and ESD, user communication process in order to ensure safe and reliable grounding , to avoid floating.

Warranty
The company's products from the shipping date to provide warranty service , one year free warranty. But by natural disasters ( such as floods , fires , etc. ) environment, climate disturbances , and other misuse, abuse and unauthorized parts replacement or repair and other acts, which cause product malfunction or damage not covered by the scope of the warranty .