Advantech BB-485LP9TB
Port-Powered RS-232 to RS-485 Converter
- 9 pin, terminal block
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Eigenschaften
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- Powered from RS-232 handshake lines — no power supply needed
- Extend RS-232 signals to 1.2km (4,000 ft)
- Automatic Send Data Control - no software drivers needed
- Communicate at baud rates to 115.2 kbps (maximum)
- Optional external powering
Model 485LP9TB is a port-powered, two-channel converter. It converts TD and RD RS-232 lines to balanced RS-485 signals. The unit can be powered from the RS-232 handshake lines, DTR and RTS. If port-powering the unit, one of these handshake lines must be asserted (high) in order to power the unit (See Table 1). DTR must be asserted to receive data. The RS-485 driver is enabled when RTS is asserted and disabled when RTS is disasserted. The RS-485 receiver is disabled when the driver is enabled and is enabled when the driver is disabled.
To maximize the amount of power available to the RS-485 driver, the RS-232 handshake lines are not looped back (tied together). As a result, the following handshake lines will appear as disasserted (low): CTS, DCD, and DSR. Care should be taken to ensure that any software being used does not require any of these handshake lines be asserted. If existing software requires any of the handshake lines to be asserted, you can loop back the required handshake lines in your cable.
To maximize the amount of power available to the RS-485 driver, the RS-232 handshake lines are not looped back (tied together). As a result, the following handshake lines will appear as disasserted (low): CTS, DCD, and DSR. Care should be taken to ensure that any software being used does not require any of these handshake lines be asserted. If existing software requires any of the handshake lines to be asserted, you can loop back the required handshake lines in your cable.
SPECIFICATIONS
| SERIAL TECHNOLOGY | |
| Data Rate | 115.2 kbps maximum |
| RS-232 Connector | DB9 female |
| RS-485 Connector | Terminal Block board |
| Biasing Resistors | 4.7k Ohms |
| POWER | |
| Source | Port-powering: from RS-232 handshake lines. External power option, 12-16 VDC |
| Power Connector | Terminal block |
| Input Voltage | 12 VDC |
| Power Consumption | 40mA maximum |
| MECHANICAL | |
| Dimensions | 8.7 x 3.2 x 1.6 cm (3.4 x 1.3 x 0.6 in) |
| Enclosure | Plastic |
| Weight | 81.6 g (0.18 lb) |
| MEANTIME BEFORE FAILURE (MTBF) | |
| MTBF | 8532569 hours |
| MTBF Calc. Method | MIL 217F Parts Count Reliability Prediction |
| APPROVALS, DIRECTIVES, STANDARDS | |
| FCC | |
| CE - Directives | 2014/30/EU - Electromagnetic CompatibilityDirective 2011/65/EU - Reduction of Hazardous Substances (RoHS) 2012/19/EU - Waste Electrical and Electronic Equipment (WEEE) |
| CE - Standards | EN 55032 Class A - Electromagnetic Compatibility of Multimedia Equipment - Emission Requirements EN 55024 - Information Technology Equipment - Immunity Characteristics - Limits and Methods of Measurement EN 61000-6-4 + A1 - Generic Emission Standard for Industrial Environments (Class A) EN 61000-6-2 - Generic Immunity Standard for Industrial Environments |
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