2
1. Introduction
TRP-C68, an 8-channel Analog to Digital Converter (ADC), takes an analog input signal and
converts the input into a digital output signal. It accepts analog input-a voltage or a current-and
supports the sample rate in “Normal” or “Fast” mode. All channels feature screw terminals for
convenient connection, All analog inputs are provided with isolation and surge protection to
protect the module against high voltage spikes, as well as ground potential differences. TRP-C68
support both ASCII and Modbus protocol, with a full set of command, dual watch-dog, and auto
reset function the module can be remote controlled by PC in ASCII or Modbus RTU protocol.
1-1. Features
Support ASCII and Modbus RTU protocol.
Photo Isolation 3750V between digital and analog.
All channels can input analog signal by voltage or current.
Baud rate from 1.2Kbps to 115.2Kbps.
Surge protection on RS-485 interface.
LED display to indicate power and communication.
Dual Watchdog for hardware reset circuit and host operating status.
External switch for hardware and module’s configuration.
Support screw terminal, or external DC power supply.
Wide input range DC power supply.
1-2. Specifications
Resolution: 16 Bit
Sample rate:
Normal mode: 10 sample / sec (24 bit).
Fast Mode: 60 sample / sec (16 bit).
Bandwidth:
Normal Mode: 15.72Hz.
Fast Mode:/78.72Hz…fast.
Zero drift: 0.03uV/C.
Span drift: 25 ppm/C.
Accuracy:
Normal 0.1 or better.
Fast: 0.5 or better.
Analog Input range:
Voltage: ± 10V, ± 5V,± 2.5V,± 1.25V,± 650mV
.
Current: +/-20 mA
CMRR:92db min/50/60Hz.
Analog input over voltage protection:
±
35V.
RS485 connector: Industrial plug-in screw terminal.
Communication Interface: RS485,2 wires.