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Serial Communication Options for Laurel Electronics 1/8 DIN Instruments
Key Features
- Applicable to all 1/8 DIN size Laureate DPMs, counters, timers & remote displays.
- Ethernet, USB, RS485, RS232 interface boards.
- Ethernet and USB converter boards for interface to RS485 bus with up to 31 meters.
- Modbus and Laurel Custom ASCII protocols supported by all boards.
- User-selectable baud rates to 19,200.
- Powered by instrument.
- Isolated from meter and power grounds.
Quick Selection Guide
| Interface Board Features & Compatibility |
Ethernet
Board |
Ethernet
Server |
RS232
Board |
USB
Board |
USB
Server |
RS485
Board |
RS485 Modbus |
| Fits all 1/8 DIN Laureates |
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| Instrument Setup software |
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| Modbus RTU & ASCII |
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| Conversion to Modbus TCP |
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| Laurel ASCII protocol |
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Networkable |
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Digitally
addressable |
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Single or
duplex RS485 |
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RS485
converter
capability |
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Connectors
for RS485 server |
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2 x RJ11 |
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2 x RJ11 |
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Connector for
input |
RJ45 |
RJ45 |
RJ11 |
USB |
USB |
RJ11 |
RJ45 |
General Specifications
| Electrical Safety & Isolation |
Isolation
ESD Protection
EMI Immunity
EFT Protection
Short Circuit Protection |
250V rms working, 2.3 kV rms per 1 min test
15 kV per IEC 1000-4-2
10 V/m per IEC 1000-4-3
2 kV per IEC 1000-4-4
Continuous |
Protocol Specifications (implemented on meter main board)
| Modbus RTU |
Standards Compliance
Data Formats (selectable)
Applicable Interface Boards
Main Board Revision Level |
Modbus over Serial Line Specification V1.0 (2002)
1. No parity, 8 data bits, 2 stop bits
2. Odd parity, 8 data bits, 1 stop bit
3. Even parity, 8 data bits, 1 stop bit
Ethernet, USB, RS232, RS485, RS485 Modbus
Level 5 or above |
| Modbus ASCII |
Standards Compliance
Data Formats (selectable)
Applicable Interface Boards
Main Board Revision Level |
Modbus over Serial Line Specification V1.0 (2002)
1. No parity, 7 data bits, 2 stop bits
2. Odd parity, 7 data bits, 1 stop bit
3. Even parity, 7 data bits, 1 stop bit
Ethernet, USB, RS232, RS485, Modbus RS485
Level 5 or above |
| Laurel ASCII |
Data Format
Protocol
Applicable Interface Boards
Main Board Revision Level |
No parity, 8 data bits, 1 stop bit
Laurel Laurel ASCII
Ethernet, USB, RS232, RS485, RS485 Modbus
Any |
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