


One three-screw-terminal connector accepts RS-232 or RS-485 serial data, as selected via jumpers on the main board. Data rates are selectable as 300, 600, 1200, 2400, 4800, 9600 or 19200 bps. The RS-232 interface is suitable for short cable runs and point-to-point communications. The RS-485 interface is compliant with the EIA/TIA-485 standard and supports multiple addressable devices on the same data line using the Modbus protocol or Laurel ASCII Protocol. Modbus implementation is fully compliant with Modbus over Serial Line Specification V1.0 (2002) in RTU or ASCII, half duplex (2-wire) operation, with up to 247 digital addresses.
The Laureate serial-to-analog transmitter is able to retrieve digital data from long character strings. You can specify character positions, start and stop ASCII characters, how many characters to skip, and how many characters to process.
The analog output is selectable as 0-10V or 4-20 mA (also scalable for 0-20 mA). All selections provide 12-bit (0.025%) resolution of the output span and are ultra-linear to within one bit. Accuracy is ±0.05% of output span. Output isolation from signal, power and serial communication grounds is provided by a separate on-board transmitter power supply, thereby eliminating potential problems caused by ground loops. The supply can an drive 20 mA into a 500 ohm (or lower) load for 10V compliance, or 10V into 5K ohm (or higher) load for 2 mA compliance.
Transmitter programming is via a three-terminal RS-232 port using Laurel's PC-based Instrument Setup Software. This software can be downloaded from this website at no charge. The required transmitter-to-PC interface cable is available from Laurel (P/N CBL03).
Laurel's transmitters and meters can be part of PC-based data logging systems using Laurel's Datalogging Software, which operates under the Laurel ASCII Protocol.| RS-232 Input Interface | |
| Data Rates | 300, 600, 1200, 2400, 4800, 9600, 19200 bps |
| Devices on RS-232 line | 1 (point-to-point, short distances) |
| Connector | Three detachable screw-clamp plugs: RXD, TCD, common |
| Supported Protocols | Modbus or Laurel ASCII |
| Isolation | 250V rms from power and analog output continuous, 2.3 kV rms per 1 min test.). |
| RS-485 Input Interface | |
| Cabling | Half duplex (2-wire) |
| Data Rates | 300, 600, 1200, 2400, 4800, 9600, 19200 bps |
| Devices on RS-485 line | 32 max |
| Connector | Three detachable screw-clamp plugs: D0, D1, common |
| Standards Compliance | EIA/TIA-485 |
| Supported Protocols | Modbus or Laurel ASCII |
| Isolation | 250V rms from power and analog output continuous, 2.3 kV rms per 1 min test. |
| Modbus Protocol | |
| Type | RTU or ASCII. |
| Standards Compliance | Modbus over Serial Line Specification V1.0 (2002). |
| Digital Addresses | 247 max |
| Laurel ASCII Protocol | |
| Type | ASCII. |
| Digital Addresses | 31 max |
| Serial Input Electrical Protection | |
| ESD Protection | 15 kV per IEC 1000-4-2 |
| EMI Immunity | 10 V/m per IEC 1000-4-3 |
| EFT Protection | 2 kV per IEC 1000-4-4 |
| Short Circuit Protection | Continuous |
| Analog Output | |
| Output Levels | 0-20 mA or 0-10 Vdc (selectable) |
| Compliance, 4-20 mA | 10V ( 0-500 ohm load ) |
| Compliance, 0-10V | 2 mA ( 5 kOhm load ) |
| Output Resolution | 12 bits (4,096 steps) |
| Output Accuracy | ±0.05% of output span |
| Isolation | 250V rms from power and serial I/O continuous, 2.3 kV rms per 1 min test |
| Dual Relay Output (optional) | |
| Relay Type | Two solid state relays, SPST, normally open, Form A |
| Load rating | 120 mA at 130 Vac or 170 Vdc, 28 ohms series resistance. |
| Power, Electrical & Setup | |
| Power to Transmitter | 95-240V AC ±10% or 90-300V DC (standard power). 9-33V AC or 10-48V DC (low voltage power option). |
| Transmitter Setup | Via RS-232 from PC using Instrument Setup Software and CBL03 cable. |
| Mechanical | |
| Case Dimensions | 120 x 101 x 22.5 mm |
| Case Mounting | 35 mm rail per DIN EN 50022 |
| Electrical Connections | Detachable screw-clamp plugs |
| Environmental | |
| Operating Temperature | 0°C to 70°C |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 95% at 40°C, non-condensing |
