MULTIPLE UNIT/REMOTE SETPOINT APPLICATION
Eight T48 controllers are used in a drying oven. Each T48 controls a zone
within the oven. Depending upon the material to be dried, and its initial
moisture content, the drying setpoint temperature varies. A master T48
controller transmits setpoint via linear DC output. This signal is received as
a remote setpoint signal by the other slave controllers.
Whenever the master controller’s setpoint is changed, the slave controller’s
setpoint changes automatically.
The remote setpoint input at each slave controller can be scaled
independently.
7
OEM PAINT SPRAYER APPLICATION
An OEM manufacturing spray painting equipment utilizes
the T48 to maintain optimum paint temperature. In addition to
the low cost, the 1/16 DIN package size permits the OEM to
design temperature control into various sized painting
equipment, from small hand sprayers to large paint booths. The
heating element used to heat the paint, is connected to the Main
Control Output (OP1) programmed for On/Off control. Alarm 1
is programmed as Band Inside Acting, so that as long as the
paint temperature is within manufacturer’s specifications for
temperature, the “GO” light is on. Alarm 2 is programmed as
Band Outside acting so that the “NO GO” light is lit when the
paint temperature is more than 12° outside the manufacturer’s
specifications of 140 to 150°F.
11
12
14
13
10
9
8
7
6
5
4
3
2
1
USER INPUT
COMM.
TC +
RTD
AL2/O2
COMM.
AL1
O1 N.O. (+)
COMM. (-)
AC POWER
85-250 VAC
AC
POWER
POWER
AC
NO GO
GO
13
14
12
11
10
9
8
7
6
5
4
3
2
1
OUT (-)
OUT (+)
02/A2 (+)
COMM (-)
01/A1 (+)
USER INPUT
COMM
TC (+)
RTD
IN (+)
IN (-)
SLAVE CONTROLLER #1
TC (+)
COMM (-)
4
9
01/A1 (+)
5
MASTER CONTROLLER
11
12
10
RTD
IN (+)
02/A2 (+)
OUT (+)
OUT (-)
3
2
1
USER INPUT
13
14
IN (-)
8
7
COMM
6
TO
HEATER
ZONE #2
ZONE #1
HEATER
TO
2ND INPUT
ANALOG
OUTPUT
AC POWER
85 - 250 VAC
AC POWER
85 - 250 VAC
REMOTE SETPOINT
SIGNAL TO OTHER
HEATER ZONES
PLASTICS EXTRUDER APPLICATION
Several T48 controllers are employed to control the
temperature of a plastics extruder. Each T48 controls a
heating element and a cooling water solenoid to maintain
each extruder zone at the desired temperature. The Heater
Current Monitor option is used to provide a readout of the
heater current. The multi-function User Input can be
programmed to allow selection of manual operation when
connected to common. This allows the user to hold the
control output of the controller during abnormal process
conditions.
11
12
14
13
10
9
8
7
6
5
4
3
2
1
AC POWER
85-250 VAC
USER INPUT
COMM.
TC +
A2/O2 N.O.
COMM.
A1 N.O.
O1 N.O. (+)
COMM. (-)
SSR
POWER
UNIT
240V HEATER
SUPPLY
COOLING
SUPPLY
EXTRUDER
COOLING
WATER
RTD
OUTPUT
HOLD
2ND INPUT OPTION
IN (+)
IN (-)
120V
CT
HEATER ALARM
APPLICATION
(Terminal assignments are model number dependent.)
(Terminal assignments are model number dependent.)
(Terminal assignments are model number dependent.)
