RESPONDER SLC

Look at picture.

The micro-sized RESPONDER™ SLCSee combines closed-loop control functionality with remote telemetry and control for industrial automation systems. A single P.I.D. (Proportional-Integral-Derivative) routine monitors it's process variable (AI) and automatically adjusts the setpoint output (or optionally, a modulated digital output), to automatically control a process without overshoot or hunting.

A RS-232 interface provides for optional communications to a Master via dedicated, public (dial-up) telephone, or radio channel. Four of the eight status inputs may be configured for low speed pulse accumulation. P.I.D. loop "tuning" constants are transmitted by the Master via industry standard protocols (ie Modbus, IEC 870-5, etc.). The unit's firmware is tailored by ADC per requirements to provide protocol support and any other real-time routines.

P.I.D. Loop Input/Output: 1AI 1AO

Auxiliary Input/Output: 8DI 2AI 4DO

__________________________________________

APPLICATIONS

• Plant control
• Production / Manufacturing automation
• Water/Gas pipeline control
• Machine control
• Chemical process monitoring and control

__________________________________________

FEATURES

• Inexpensive and easy to install
• Small (4 X 6 X 1") size
• Highly accurate analog input/outputs for precise process control
• CMOS circuitry for minimum power consumption and high noise immunity
• Industrial quality components and workmanship for long and reliable operation

The figure above illustrates how RESPONDER SLCs can be implemented for plant control applications. RESPONDER SLCs do not have integral displays for viewing and altering the process and/or P.I.D. variables, but rather depends upon an upstream host computer to provide for user interface and configuration functions. Third-party graphical display software generally provides enhanced flexibility with regard to how the plant information is displayed and controlled by the system operators. For example, the relationship between each loop's process and setpoint variable, might best be presented in a graphical (LED segment) form instead of the usual digit displays found on conventional controllers. This approach also permits operators who are geographically separated from the location of the SLCs to monitor and control the system.

The SLCs do not require the presence of a host computer in order to perform it's internal P.I.D. functionality. RESPONDER SLCs can be procured individually, or as part of an integrated system.

__________________________________________

SPECIFICATIONS

__________________________________________

Operating environment (electronics)

• Standard -10 to +70°C temperature
• 0 to 95% relative humidity (non-condensing)

__________________________________________

Operating power

• 20-28VDC input power
  (AC/DC-DC converters/chargers available)
• Typical logic current drain 40mA
• Typical ON control relay draws 16mA

__________________________________________

Digital inputs ("status"), common mode

• Input signal must sink 10mA from 24VDC source

__________________________________________

Optional (soft) pulse inputs

• Input frequency: DC to 13Hz

__________________________________________

Analog inputs (A/D conversion)

• Conversion rate: 20msec per point, nominal
• Conversion accuracy: ±0.10% of span
• Conversion resolution: 1 part in 4000
• Accepts ±1mA, ±2.5V (bipolar) signals or 420mA, 0-2.5V (unipolar) signals. RTD and thermocouple sensors require separate transmitter module.
• Inputs are single-ended and are referenced to the instrument supply common

__________________________________________

Transient protection

• Meets or exceeds IEEE C37.90A-1987
  surge withstanding specification

__________________________________________

Analog output (P.I.D. equate, D/A conversion)

• Conversion accuracy: ±0.20% of span
• Conversion resolution: 1 part in 4000
• True constant current output (4-20mA)
• Max loop resistance: 1100 for 24V supply
• Normally derives operating power from separate instrument supply (requires 4-20mA)

__________________________________________

Primary control outputs

• Isolated Form A contact
• Rated for 0.6A at 120VAC or 2.0A at 30VDC
• Select output(s) configured as open collectors when P.I.D. subsystem generates PWM signals (P.I.D. output option)

__________________________________________

Communication Port

• Interface: RS232 (DE9 female). Adaptable to RS422 or RS485 with optional line driver chip.
• Word length: 10 or 11-bit, asynchronous
• Data rates: 600-4,800bps

__________________________________________

ADDITIONAL INFORMATION

Push the "BACK" button in your browser program after viewing the following pages, to return to this page:

Look at picture.

__________________________________________

ORDERING INFORMATION

200122: RESPONDER SLC CARD

This assembly is provided in the following versions (XXX designation of part number).

• -001: Unit card, bipolar analog inputs
• -002: Unit card, unipolar analog inputs

200122-001 $678

200122-002 $678

OPTIONAL LINE DRIVER CHIPS. These components replace the standard RS-232 line driver I.C. (socketed DIP).

200127-001, RS-485 $24

200127-002, RS-422 $24

Contact representative for more information and pricing on integrated systems.

Go back to CATALOG top page

Go back to ADC home page