Transio A52/53

Entry-Level RS-232 to RS-422/485 Converters

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Features and Benefits

  • ADDC™ (Automatic Data Direction Control) RS-485 data control
  • Auto baudrate sensing
  • RS-422 hardware flow control: CTS, RTS signals
  • LED indicators for power and signal states
  • RS-485 multidrop operation, up to 32 nodes
  • 25 KV ESD surge protection
  • 2 KV isolation protection (A53)
  • Built-in 120 Ω termination resistors

Introduction

The Transio A52 and A53 are smart RS-232 to RS-422/485 bi-directional converters that come with all of the great technical specs that Moxa is known for. This includes data direction control built into the hardware for both the RS-422 and RS-485 interfaces, LED indicators for power and signal states, and surge protection and isolation protection. The last two features take care of some of the major problems faced by serial communication connections in industrial environments.

Serial Connection Problems in Industrial Environments

Serial communication and reliability can be adversely affected in a hazardous industrial environment. The wiring associated with serial communication devices could be surrounded by power lines, motors, or equipment that produces static electricity. If this is the case, the serial devices could be damaged by sudden surge waves produced by this type of equipment. In this situation, surge protection that uses TVSS (Transient Voltage Surge Supression) is the solution.

When two serial devices are directly connected, but separated by a long distance, the unbalanced ground voltage could cause serious damage. Unbalanced ground voltage between two serial ports forms a “ground loop,” introducing a large current between the two pieces of serial equipment. In fact, the current could be so lare as to damage the equipment beyond repair. In this situation, the solution is to use isolation protection to provide complete isolation for both communication ports.

What is Surge Protection?

Surges are high amplitude pulses that last only a few millionths of a second in duration. They can be caused by heavy-duty equipment, power lines, short circuits, or large motors. A surge suppressor has the ability to absorb the high energy instantly and effectively to prevent the connected devices from being damaged.

What is Isolation Protection?

Electrical isolation is achieved by using a photo coupler to transform an electric signal into light, and then retransform the light back into an electric signal on the other side of the isolator. In this way, the two electric circuits are completely isolated from each other.

• Serial Communication
RS-232 SignalsTx, Rx, DTR, DSR, RTS, CTS, DCD, GND (RJ45)
RS-422/485 SignalsSupports RS-422, 2-wire RS-485 (DIP switch selectable)
Supports 4-wire RS-422, up to 10 nodes, 1.2 km with RTS, CTS
Supports 2-wire RS-485, up to 32 nodes, 1.2 km
Optical Isolation Protection2 KV (A53), power/signal
Power EFT/Surge Protecction25 KV ESD surge protection
• RS-422/485 Side
RS-485 Data Direction ControlADDC™
• Serial Transmission
Baudrate50 bps to 230.4 Kbps
• Physical Characteristics
HousingABS
Weight85 ± 5 g
Dimensions90 x 60 x 21 mm
• Environmental Limits
Operating Temperature0 to 55°C (32 to 131°F)
Operating Humidity5 to 95% RH
Storage Temperature-20 to 75°C (-4 to 167°F)
• Power Requirements
Input Voltage9 to 30 VDC, 350 mA
Power ConsumptionA52: 170 mA @ 9 V
A53: 285 mA @ 9 V
Over Current ProtectionProtection against 2 signals shorted together
• Regulatory Approvals
CEClass A
FCCClass A
• Warranty
Warranty Period5 years
DetailsSee https://www.moxa.com/support/warranty.htm

Available Models

Model No.Description
A52RS-232 to RS-485 converter with 25 KV ESD surge protection (Only available outside the Americas)
A52/110V or A52/230VA52 with 110V or 230V power adaptor
A53RS-232 to RS-485 converter with 25 KV ESD surge protection and 2 KV isolation (Only available outside the Americas)
A53/110V or A53/230VA53 with 110V or 230V power adaptor

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