42213 Sarah Way, Temecula, CA 92590,
Tel: 800-854-8530 (USA)
RS232 & RS485 Options
Isolated two-way point-to-point or multipoint
RS232 Interface Board
RS485 Interface Board
- Allows meter or
Output latest value, peak value and alarm status to a
computer, PLC or remote Micro display.
Serve as a remote display to a computer, PLC or other Micro.
Be set up via computer using PC-compatible application software (furnished).
- Data rates selectable from 300 to
- Powered by meter or counter.
- Isolated from meter and power
- RS485 version allows up to 31
meters or counters to be multidropped on same data line.
Micro DPMs and counters offer RS232
or RS485 communication boards to interface with computers, PLCs or other digital devices,
including the Micro 6-digit remote display. Both boards are connected via phone jacks
using standard 4- or 6-conductor phone cables. With either board,
provides Windows-compatible software which allows device setup via a computer monitor.
With DPMs and counters, the information
transmitted via RS232 or RS485 includes the latest signal value (filtered or
unfiltered), peak signal value, alarm values and status. By using a serial interface
board, a Micro counter can be used as a remote display to an external device or to
Point-to-Point Communications with
The RS232 option allows a Micro meter or
counter to be programmed by a computer, to output data to a computer, or to drive a
panel-mount printer, remote display, or other digital device with an RS232 interface.
There can normally only be one meter or counter per RS232 line. However, multiple remote
displays can be connected to a single RS232 line in multidrop fashion.
The RS232 request-to-send line (RTS) can be
set to a latched mode, where a single reading is transmitted when the line is taken high.
This mode allows a single data transfer to be commanded by a device other than a computer.
Multidrop communications with RS485
The RS485 version allows multiple Micro
meters, counters and remote displays, as well as non-Micro devices, to be connected to
the same RS485 line in parallel, multidrop fashion. Each device has its own, unique
digital address. It provides for up to 31 digital addresses, so that multiple Laureates
can be addressed and transmit on the same data line.
Data rates are selectable from 300 to 19,200
bps. In case of long line lengths, the RS485 board at the end of the line can be
terminated by a jumper-selectable 120 ohm resistor to minimize signal reflections. A full
duplex mode with separate wire pairs for transmit and receive is offered by the RS485
version, as is a half duplex mode with shared transmit and receive wires.
The use of RS485 lines maximizes utilization
of computer ports and simplifies plant wiring. As opposed to RS232, RS485 uses two pairs
of balanced lines, which allow long cable runs in electrically-noisy environments.
Transmission distance up to one mile are possible.
Short Circuit Protection
Full and half duplex
300, 600, 1200, 2400, 4800, 9600, 19200 bps
Compliant with RS232 or RS485 standards
No parity, 8 data bits, 1 stop bit
15 kV per IEC 1000-4-2
10 V/m per IEC 1000-4-3
2 kV per IEC 1000-4-4
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