Catacomm Corporation
Sdn Bhd

Unit E1-29-6, Block E1,
Dataran Prima, Jalan PJU 1/42,
47301 Petaling Jaya,
Selangor, Malaysia.
+603-7803 8228
+603-7803 8228
clyeow@catacomm-corp.com

RS-232 to RS-422/485 Isolated bi-directional Interface Converter

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RS-232 to RS-422/485 Isolated bi-directional Interface Converter Serial Interface Converters Industrial Communication Products AD-Net RS-232 to RS-422/485 Isolated bi-directional Interface Converter Serial Interface Converters Industrial Communication Products AD-Net RS-232 to RS-422/485 Isolated bi-directional Interface Converter Serial Interface Converters Industrial Communication Products AD-Net RS-232 to RS-422/485 Isolated bi-directional Interface Converter Serial Interface Converters Industrial Communication Products AD-Net
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Description


The AN-OS-RS-232/422/485 is a series of a bi-directional interface converters. AN-OS-RS-232/422/485 optically isolate and convert unbalanced, full or half-duplex RS-232 signals to 0ptically isolated, balanced, full or halfduplex RS-422 or RS-485 signals at baud rates up to 115.2 kbps.
 
These units also surge suppress the RS-422/485 lines. They feature Send Data Control circuitry so no software control of handshake lines is required in RS-485 mode. AN-OS-RS-232/422/485 has built-in isolators for high voltage (2500V) protection. it provides Point-to-Point, Multidrop and Simplex Operations. AN-OS-RS-232/422/485 can be powered from the DC 9V, 200mA power adapter. One slide switches are used to configure its operation mode.
 

Features
 

 Electric interface: RS-232C interface DB25 hole connector RS-422/485 interface 4-bit terminal or RJ-11 port
 Transmission media: twisted-pair cable or shielded cable
 Working mode: asynchronous half or full duplex
 Signal indication: a dual color signal indication light indicates TD, RD data
 Isolation: isolation voltage 3500VRMS 500VDC sequence
 Power supply: serial port electricity stealing at RS-232 end. External power supply connecting at RS-422/485 end
 
Application fields:
 
 Point to point, point to multi-point communication
 Industrial distribution system, industrial control automation
 Road traffic control automation
 Closed circuit monitoring
 Security protection system
 Intelligent card, check on work attendance gate safety system
 

Specifications
 

Interface
Conforms to EIA /RS-232 and RS-422/485 standards.

Connectors and signals
The ATC-107 has a DB-25 female connector on the RS-232 side and a terminal block connector on the RS-422/485 side

RS-232 Side:
Connector: DB-25 Female.
SignalsUnit will be connected into a DTE interface.
Use Pins 3 (TXD)2 (RXD) and 7 (Near side ground) .
Use Pin 24 20 to power from unit’s RS-232 side.

RS-422/485 Side:
RS-422 Connector: 4 position terminal  block : (1)T+ (2)T-(3)R-(4)R+.
RS-485 Connector: 4 position terminal block: (1)485+, (2)485-.
Signals: Dual-duplex or Half-duplex two-wire/four-wire operation only.

Data Rate:
300 to 115.2 KBPS, up to 1.2km at 38.4 KBPS.

Sending Control
Unit can use handshake lines to power the converter, no handshaking is required to control the RS-422/RS-485 driver. the RS-485 driver is automatically enabled during each spacing state on the RS-232 side. During the marking or idle state, the RS-485 driver is disabled and the data lines are held in the marking state by the 4.7K Ohm pull-up and pull-down resistors.

Operating Distance
Data Rate (KBPS)      38.4  19.2  9.6  4.8
Maximum Distance (km) 1.2   2.0   2.5   3.5 (using 24 AWG wire)

Power
At the RS-422/485 side, unit is powered by an external power supply (+9VDC to +12VDC@200mA) by a AC/DC adapter. At the RS-232 side It powered by RS-232 signals TXD,RTS or DTR. You only need one of these signals, the ground signals in two sides are different.

Switches:
RS-422/RS-485 switch selectable for RS-422/485 operation mode. If you set unit to RS-422 mode, then it  can convert the TD and RD signals of RS-232 into balanced Dual –duplex RS-422 signals. If you set unit to RS-485 mode, then it can convert the TD and RD signals of RS-232 into balanced Halfl –duplex RS-485 signals.

LED light
One LED indicates sending data to (RED) or receiving data from (GREEN) RS-422/485 bus.

Isolation:
Optical Isolation is rated at 2500V.

Dimensions:
8mm x 75mm x 20mm

Environment:
0* to 50* C
5% to 95% relative humidity.
 

Ordering Information

AN-OS-RS-232/422/485
RS-232 to RS-422/485 Isolated bi-directional Interface Converter               .

 

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