Industrial RS-232 to RS-422/485 Converter
- Data rates up to 115.2 kbps
- Three-way 2,000V optical isolation (input, output, power)
- Wide operating temperature
- UL Class 1/Division 2
- Modbus ASCII/RTU compatible
- 10–48 VDC input power range
Description
Model 485DRCi industrial-grade isolated serial converter changes RS-232 signals to RS-422 for increased range, or to RS-485 for increased range plus multi-drop capability.
Designed for rugged industrial use, the 485DRCi is UL approved and certified for operation in Class 1/Division 2 environments and also offers 2,000V 3-way optical isolation on input, output, and power lines. In addition to optical isolation, the unit has surge suppression on the RS-422/485 lines. This DIN rail mountable converter optically isolates and converts unbalanced, full or half-duplex, RS-232 signals to balanced RS-422/485 signals at baud rates up to 115.2 kbps. Configuration is made via a 12-position DIP switch on the bottom of the converter.
Featuring Automatic Send Data Control circuitry, the converter does not require special software control of handshake signals in RS-485 mode. Removable terminal blocks for power and RS-422/485 signals make wiring easy. It is powered by a supply voltage of 10 to 48 VDC which is isolated from all data and signal ground lines.
| Part Number | RS-232 Connector | RS-422/485 Connector | Isolation |
|---|---|---|---|
| BB-485DRCi | DB9 Female (DCE) | Removable Terminal Block | 2,000 V |
| Serial Technology | |
|---|---|
| Data Rate | 1.2 to 115.2 kbps |
| RS-232 | |
| Connector | DB9 female (DCE) |
| Signals | TD, RD, GND |
| RS-422/485 | |
| Connector | Removable terminal block, 28 to 14 AWG |
| RS-485, 2-wire | Data A(-), Data B (+), GND |
| RS-422/485, 4-wire | TDA(-), TDB(+), RDA (-), RDB(+), GND |
| Isolation | |
| Rating | 2,000 V |
| Lines Protected | 3-way (input, output, power lines) |
| Method | Optical |
| Surge Suppression | |
| Lines Protected | Data lines |
| Rating | 600W peak power dissipation |
| Clamping / Response Time | < 1 pico-second |
| Industrial Bus | |
| Modbus | ASCII/RTU |
| Power | |
| Connector | Removable terminal block, 28 to 14 AWG |
| Voltage | 10-48 VDC |
| Consumption | 960 mW |
| Source | External |
| Mechanical | |
| LED Indicators | Transmit, Receive, and Power |
| Dimensions | 11.4 x 3.3 x 12.4 cm (4.5 x 1.3 x 4.9 in) |
| Enclosure | 35mm DIN mount, plastic, IP30 |
| Weight | 204.12 g (0.45 lbs) |
| Environmental | |
| Operating Temperature | -40 to +80 °C (-40 to +176 °F) |
| Storage Temperature | -40 to +85 °C (-40 to +185 °F) |
| Operating Humidity | 0 to 95% non-condensing |
| MTBF | 254617 hours |
| MTBF Calculation Methods | Parts Count Reliability Prediction |
| Class 1 / Division 2 Wiring | |
| Type | Solid copper only |
| Size | 28 to 14 AWG |
| Temperature | 105 °C (221 °F) minimum |
| Terminal Torque | 0.5 Nm (Newton-meters) |
| Approvals / Certifications | |
| cUL 508, File Number: E222870 (C1 D2 E245458) | |
| FCC Part 15, CISPR, EN 55022: 2010 + AC:2011 Class B Emissions | |
| CE | |
| EN 61000-6-1: 2007 Generic Standards for Residential, Commercial and Light Industrial Environments | |
| EN 61000-4-2: 2009 Electro-Static Discharge (ESD) | |
| EN 61000-4-3: 2006 +A1 +A2 +IS1 Radiated Field Immunity (RFI) | |
| EN 61000-4-4: 2012 Electrical Fast Transients-Burst Immunity (EFT) | |
| EN 61000-4-6: 2009 Conducted Immunity | |