CM-20 

The CM-20 controller offers system flexibility and ease of maintenance in a space-saving package. The unit’s heavy-duty enclosure helps protect its electronics from accidental damage.

The CM-20 can execute predefined control functions independently from SCADA communications.  These local control functions can provide:

  • Simple "backup" control when communications fail.

  • Pump protection features independent of your ACCOL BSAP® or PLC program.

  • Cycle counts and elapsed run time accumulators that hold their values through downloads and power outages.

The CM-20 provides 15 protected digital inputs and 5 discrete outputs. Two inputs can be alternately configured as an RS-485 port.

  • 15 digital inputs

  • 2 of the digital inputs can be used as an RS-485 port

  • 5 discrete outputs (one used as a "Watchdog")

  • 1  RS-232 port

The CM-20 will mount properly on a DIN rail using an optional DIN adapter.

Accessories

  • Optically Isolated Output Relays

  •  Watchdog Output Relay

  • DIN Rail Mounting Kit

  • Windows Setup/Diagnostics Utility Software

Specifications 

Enclosure size

2.96"x5.0"x1.81" (75x127x46)

Operating temp

 –40°C to +70°C

Humidity

 5% to 95%, noncondensing

Input voltage

9V— 36V DC, 75 mA typical at 25°C at 24V. Switching regulator.

Digital inputs

15 protected inputs: 
two of which can be used for an RS-485 port.
Continuous operation from -20V to +24V.

Digital outputs

5 high-current channels (75 mA/ channel at 48V).  At 25°C, a channel can sink up to 500 mA continuously.
Sourcing outputs optional (75 mA/ channel at 48V). At 25°C, a channel can source up to 250 mA continuously.
Output is subject to package power limits and duty cycle.

Processor

CM7200 (Z180 at 18.432MHz)

SRAM

128K, standard

Flash

128K, standard

Serial ports

One RS-232 (with RTS/CTS handshake) and one RS-485 (two-wire)

Serial rate

Up to 57,600 bps

Watchdog/supervisor

on CM7200

Backup battery

3V lithium coin-type, 165 mA·h

Connectors

Two screw terminal blocks with 19 screw terminals. 3.5 mm pitch.
 

Copyright © 2001-2010 Starnet Technologies, Inc.
Last modified: October 18, 2010