C277

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bulletMODBUS RTU I/O Extender
bulletPrecision Temperature Scanning
bulletReads Thermocouples and 4-20 mA Analogs.
bullet18 Channels in One Unit
bulletChannel Configuration Done Via MODBUS communications.
bulletUL/cUL Listed Class 1 Div. 2 Groups C & D

Canadian - US Listing Mark

 

A

Status LED’s: There are Four Status LED’s on the C277.
·          COM stands for Communication.  It will flash any time a communication packet passes to or from the C277.
·          COP stands for Controller Operating Properly.  It will flash every half-second if the internal CPU is functioning properly.  This light should start flashing as soon as power is supplied to the PWR1 connection.
·          PWR1 stands for Power 1.  This light will turn on when power is properly applied to the Pins B+ and B-.  This is the control power.
·          PWR2 stands for Power 2.  This lights when the internal (minus) 5 VDC supply is functioning properly.
B RS-485 Communication Port: Port A, Port B, and Port C are electrically common, for wiring convenience.  If more than one module is used, you can bring your patch cable into Port A and then connect from Port B to the next module.  Note:  The last module in the communication chain must have a terminating resistor module. Port C is used in environments that require a screw-down terminal for connection.
C MODBUS Address Select Shunts: These shunts allow you to assign a unique address to each C277 that may be in the system.  This allows the master controller to differentiate between the modules.  For example, to name the controller address 21, place the shunts on LK1, LK4, and LK16 (1+4+16 = 21).
D Control Power Terminals: Hook battery (+) to the terminal labeled B+. Hook battery (-) to the terminal labeled B-.
E Channel Connection Terminals: Each channel has two dedicated terminals.  The top row is the negative side of the connection and the bottom row is the positive side of the connection.

C277 Description

The C277 is a member of the Ryeso Comm Series of controllers.  It adds temperature-sensing capability to existing and future Ryeso Controllers via MODBUS RTU communication via an RS-485 port.  It can read up to 18 thermocouples and/or mA sources.

C277 Specifications

Input Voltage 9 to 28 VDC
Operating Temperature -22 to 158 °F (-30 to 70 °C)
Storage Temperature -22 to 158 °F (-30 to 70 °C)
Communications: 1 – RS-485 9600-N-8-1 Communication port with multiple connection types. 
Inputs 18 – Can be configured to read thermocouples or end of line 0-24 mA (4-20mA) signals

For more detailed information on this platform, please click here.