---
lang: "en"
title: "MOXA Transio A53-DB25F"
sku: "A53-DB25F W/O ADAPTER"
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brand: "MARCOM S.r.l."
end_of_life: "false"
---

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TR-A53-DB25F: Entry-Level RS-232 to RS-422/485 Converter with DB25F Cable

Transio A53 devices are intelligent bidirectional RS-232 to RS-422/485 converters. 
They feature data flow control for both RS-422 and RS-485, LED indicators for power and signal status, surge protection, and isolation protection.

**Serial Connection Issues in Industrial Environments**

Serial communication and reliability can be negatively affected in industrial environments. The cabling associated with serial communication devices might be surrounded by power lines, motors, or equipment that produces static electricity. In such cases, serial devices can be damaged by sudden surges produced by these types of equipment. 
In these situations, the solution is to use surge protection that utilizes TVSS (Transient Voltage Surge Suppression).

When two serial devices are directly connected but separated by a long distance, unbalanced ground voltage can cause serious damage. Unbalanced ground voltage between two serial ports forms a "ground loop" and introduces a large current between the two serial devices.
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. They can be caused by equipment with high power consumption, power lines, short circuits, or large motors. A suppressor has the ability to instantly absorb high energy, thereby preventing damage to connected devices.

**What is Isolation Protection?**
Electrical isolation is achieved by using a photo-coupler to convert an electrical signal into light, and then convert the light back into an electrical signal. In this way, the two electrical circuits are completely isolated from each other.

 KEY FEATURES

 

| Serial Interface | - RS-232 Signals: Tx, Rx, DTR, DSR, RTS, CTS, DCD, GND (RJ45)
- RS-422 Signals: 4-wire RS-422, up to 10 nodes, 1.2 km with RTS, CTS
- RS-485 Signals: 2-wire RS-485, up to 32 nodes, 1.2 km
- Optical Isolation: 2 KV, power/signal
- Surge Protection: 25 KV ESD |
|---|---|
| Serial Transmission | from 50 bps to 230.4 Kbps |
| Physical Characteristics | - ABS Casing
- Weight: 85 gr
- Dimensions: 90 x 60 x 21 mm |
| Power Supply | - 9 ~ 30 VDC
- Max current consumption 285mA @ 9VDC
- Overcurrent protection |
| Environmental Conditions | - Operating Temperature: 0 ~ 55°C
- Humidity: 5 ~ 95% (non-condensing) |

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Source: https://shop.marcomweb.it/en/serial-networks/moxa-transio-a53-db25f

MARCOM S.r.l. — a trusted supplier for industrial automation and building automation.