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The Modicon B883-200 Thermocouple Input Module is a smart I/O module that multiplexes up to ten thermocouples into three consecutive input registers of the control system. Each B883-200 module provides reference junction temperature compensation, open circuit detection, and linearization for ten thermocouples. Also built-in are selfcalibration, internal diagnostics, and 800-series bus diagnostics. Any mix of type B, E, J, K, R, S, T or N thermocouple operations or simple -20 to +80 mV input operations may be set by the user under program control. For the thermocouple inputs, the PLC can access individual temperature readings in degrees Centigrade, Fahrenheit or in compensated millivolts. Each time the PLC scans theB883-200 module, it receives the specified temperature or millivolt reading along with open-circuit and module health data. The thermocouple wire is terminated on a special isothermal connector assembly on the housing. Each B883- 200 module uses three consecutive input registers and three output registers.
The B883-201 Resistance Temperature Detector (RTD) module is a smart I/O module that multiplexes up to eight two- or three-wire RTDs into three consecutive input registers of a control system. Each B883-201 module provides linearization for any mix of 8 RTDs. Also built-in are self-calibration, internal diagnostics, and 800-Series bus diagnostics. American standard platinum, European standard platinum per DIN, or linear resistance input can be selected by the user under program control. When an RTD is selected, the PLC can access each individual temperature reading in Centigrade, Fahrenheit or in compensated millivolts. Each time the PLC scans the B883-201 module, it receives the specified temperature or millivolt reading along with open-circuit and module health data. Each B883-201 uses three consecutive input registers and three output registers. These registers are assigned to the same slot within the channel.
The B884-002 PID Module provides two completely independent and separate Proportional Integral Derivative (PID) loops. You can configure the PID loops for control strategies including open loop, closed loop, PID, PID on error squared and cascade control. You configure the PID module using a configuration program (Part #SW-BDD-3DA) on an IBM or compatible personal computer. You can download the data either through the PLC or directly to the modules, where it is stored in a non-volatile EEPROM memory. To ensure the highest accuracy and reliability, the module has fully floating, isolated and protected inputs and outputs. The module has seven independently configured analog inputs (4 voltage/current, 2 thermocouple, 1 frequency), two analog outputs, two discrete inputs and two discrete outputs. Each loop is assigned two voltage and one thermocouple inputs. There is no need for any analog adjustments such as trimpots for zero, offset, or span, which results in superior accuracy, stability and reliability.