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 (-)

49

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.)