red lion TCU Product Manual

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MODEL TCU - TEMPERATURE CONTROL UNIT
U L
C US LISTED
R
IND. CONT. EQ.
51EB
100 msec SAMPLING PERIOD WITH 0.15% ACCURACY

ON DEMAND AUTO-TUNING OF PID CONTROL SETTINGS

DUAL LED DISPLAYS FOR SIMULTANEOUS INDICATION OF

TEMPERATURE AND SETPOINT, SECOND ANALOG INPUT OR
HEATER CURRENT
ACCEPTS 10 DIFFERENT TYPES OF SENSOR INPUTS

(Thermocouple or RTD)
DESCRIPTION
The TCU Controller accepts signals from a variety of temperature sensors
(thermocouple or RTD elements), precisely displays the process temperature,
and provides an accurate output control signal (time proportional or linear) to
maintain a process at the desired control point. A comprehensive set of easy to
use steps allows the controller to solve various application requirements.
The controller can operate in the PID control mode for both heating and
cooling, with on-demand auto-tune, which will establish the tuning constants.
The PID tuning constants may be fine-tuned by the operator at any time and then
locked out from further modification. The controller employs a unique overshoot
suppression feature, which allows the quickest response without excessive
overshoot. The unit can be transferred to operate in the manual mode, providing
the operator with direct control of the output. The controller may also be
programmed to operate in the ON/OFF control mode with adjustable hysteresis.
DIMENSIONS In inches (mm)
%PW MAN AL1
DEV OP1 AL2
DSP
PAR
1.95
(49.5)
Note: Recommended minimum clearance (behind the panel) for mounting clip installation is 5.5" (140) H x 2.1" (53.4) W.
5.41
(137.4)
3.80
(96.5)
5.29
.40
(134.4)
(10.2)
SELF-DIAGNOSTICS

FULL PID CONTROL WITH REDUCED OVERSHOOT

OPTIONAL RS485 SERIAL COMMUNICATIONS INTERFACE

OPTIONAL DUAL ALARM OUTPUTS (USES OUTPUT MODULES)

OPTIONAL COOLING OUTPUT (USES OUTPUT MODULE)

OPTIONAL LINEAR 4 to 20 mA or 0 to 10 VDC OUTPUT FOR

CONTROL OR TEMPERATURE RE-TRANSMISSION
OPTIONAL HEATER CURRENT MONITOR AND BREAK ALARM

OPTIONAL MOTORIZED VALVE POSITION CONTROL AND

VALVE FAIL ALARM
OPTIONAL SECOND ANALOG INPUT FOR REMOTE SETPOINT

AND CASCADE CONTROL
OPTIONAL TYPE 4X/IP65 SEALED FRONT BEZEL

STATUS INDICATORS FOR OUTPUTS AND CONTROL MODES

PROGRAMMABLE USER INPUT (DIGITAL) FOR ADDED

FLEXIBILITY
SENSOR ERROR COMPENSATION (Slope and Offset) AND

BREAK DETECTION
MANUAL/AUTOMATIC AND LOCAL/REMOTE SETPOINT

CONTROL MODES
SETPOINT RAMPING FOR PROCESS STARTUP

PARAMETER SECURITY VIA PROGRAMMABLE LOCKOUTS

FIELD REPLACEABLE AND INTERCHANGEABLE OUTPUT

MODULES (Relay, Logic/SSR Drive and Triac)
Dual 4-digit displays allow viewing of the process temperature and setpoint
simultaneously. Front panel indicators inform the operator of the controller and
output status. Replaceable and interchangeable output modules (relay, SSR
drive, or triac) can be installed for the main control output, alarm output(s) and
cooling output.
Optional dual alarms can be configured to activate according to a variety of
actions (Absolute HI or LO, Deviation HI or LO, Band IN or OUT, Heater
Break and Valve Fail Detect) with adjustable hysteresis. A standby feature
suppresses the output during power-up until the temperature stabilizes outside
the alarm region. An optional secondary output is available (for processes that
require cooling) which provides increased control accuracy and response.
3.60
(91.4)
1.75
(44.4)
1
1
Bulletin No. TCU-H
Drawing No. LP0314
Released 08/13
PANEL CUT-OUT
1.77
+.02
-.00
(45.0 )
+.6
-.0
3.62 +.03
-.00
(92.0 )
+.8
-.0