2

Optional Remote Setpoint input (0/4 to 20 mA) allows for cascade control

loops, where tighter control is required; and allows for remotely driven setpoint

signal from computers or other similar equipment. Straightforward end point

scaling with independent filtering and local/remote transfer option expand the

controller’s flexibility.

The optional RS485 serial communication interface provides two-way

communication between a T48 and other compatible equipment such as a

printer, PLC, HMI, or a host computer. In multipoint applications (up to thirty-

two), the address number of each T48 on the line can be programmed from 0 to

99. Data from the T48 can be interrogated or changed, and alarm output(s) may

be reset by sending the proper command code via serial communications. PC

software, SFCRM, allows for easy configuration of controller parameters.

These settings can be saved to disk for later use or used for multi-controller

down loading. On-line help is provided within the software.

The unit is constructed of a lightweight, high impact plastic case with a tinted

front panel. The front panel meets NEMA 4X/IP65 specifications when properly

installed. Multiple units can be stacked horizontally or vertically. Modern

surface-mount technology, extensive testing, plus high immunity to noise

interference makes the controller extremely reliable in industrial environments.

SAFETY SUMMARY

All safety related regulations, local codes and instructions that appear in the

manual or on equipment must be observed to ensure personal safety and to

prevent damage to either the instrument or equipment connected to it. If

equipment is used in a manner not specified by the manufacturer, the protection

provided by the equipment may be impaired.

Do not use the T48 to directly command motors, valves, or other actuators not

equipped with safeguards. To do so can be potentially harmful to persons or

equipment in the event of a fault to the controller. An independent and redundant

temperature limit indicator with alarm outputs is strongly recommended.

SPECIFICATIONS

1. DISPLAY: Dual 4-digit

Upper Temperature Display: 0.4" (10.2 mm) high red LED

Lower Auxiliary Display: 0.3" (7.6 mm) high green LED

Display Messages:

“OLOL”

- Appears when measurement exceeds + sensor range.

“ULUL”

- Appears when measurement exceeds - sensor range.

“OPEN” - Appears when open sensor is detected.

“SHrt”

- Appears when shorted sensor is detected (RTD only)

“...”

- Appears when display values exceed + display range.

“-..”

- Appears when display values exceed - display range.

LED Status Annunciators:

%P

- Lower auxiliary display shows power output in (%).

MN

- Flashing: Controller is in manual mode.

On: Local Setpoint (Remote Setpoint option)

Off: Remote Setpoint

DV

- Lower auxiliary display shows deviation (error) from

temperature setpoint or shows heater current.

O1

- Main control output is active.

A1

- Alarm #1 is active (for A1 option.).

A2

- Alarm #2 is active OR

- Cooling output (O2) is active

2. POWER:

AC Versions: 85 VAC min. to 250 VAC max., 50 to 60 Hz, 8 VA max.

DC Versions:

DC Power: 18 to 36 VDC; 7 W

AC Power: 24 VAC ± 10%; 50 to 60 Hz, 9 VA

3. CONTROLS: Four front panel push buttons for modification and setup of

controller functions and one external input user for parameter lockout or

other functions.

values.

5. MAIN SENSOR INPUT:

Sample Period: 100 msec

Response Time: Less than 300 msec typ., 400 msec max. (to within 99% of

final value w/step input; typically, response is limited to response time of

probe)

Failed Sensor Response:

Main Control Output(s): Programmable preset output

Display: “OPEN”

Alarms: Upscale drive

Normal Mode Rejection: 40 dB @ 50/60 Hz (improves with increased

digital filtering.)

Common Mode Rejection: Greater than 120 dB, DC to 60 Hz

Protection: Input overload 120 VAC max. for 15 seconds max.

6. THERMOCOUPLE INPUT:

Types: T, E, J, K, R, S, B, N, Linear mV, software selectable

Input Impedance: 20 MΩ all types

Lead resistance effect: 0.25 µV/Ω

to 50°C max. ambient temperature range. Defeated for Linear mV

indication mode.

Resolution: 1° for all types, or 0.1° for T, E, J, K, and N only.

7. RTD INPUT: 2 or 3 wire, 100 Ω platinum, alpha = 0.00385 (DIN 43760),

alpha = 0.0039162

Excitation: 150 µA typical

Resolution: 1 or 0.1 degree

Lead Resistance: 15 Ω max. per input lead

8. INDICATION ACCURACY: ±(0.3% of Span +1°C.) includes NIST

conformity, cold junction effect and A/D conversion errors at 23°C after 20

min. warm-up.

9. USER INPUT: Internally pulled up to +5 VDC (1 MΩ).

Response Time: 120 msec max.

Functions:

10. CONTROL AND ALARM OUTPUTS: (Heating, Cooling or Alarm)

Relay outputs with Form A contacts:

Contact Rating: 3 A @ 250 VAC or 30 VDC (resistive load).

Life Expectancy: 100,000 cycles at max. load rating.

(Decreasing load and/or increasing cycle time, increases life

expectancy.)

Logic/SSR Drive Outputs:

Rating: 45 mA @ 4 V min., 7 V nominal

Triac Outputs:

Type: Isolated, Zero Crossing Detection

Rating:

Voltage: 120/240 VAC

Max. Load Current: 1 Amp @ 35°C

0.75 Amp @ 50°C

Min Load Current: 10 mA

Offstate Leakage Current: 7 mA max. @ 60 Hz

Operating Frequency: 20 to 400 Hz

Protection: Internal transient snubber

11. MAIN CONTROL:

Control: PID or ON/OFF

Output: Time proportioning or Linear DC

Cycle time: Programmable

Auto-tune: When selected, sets proportional band, integral time, and

derivative time values.

Probe Break Action: Programmable

12. ALARMS: 1 or 2 alarms (optional)

Modes: Absolute high acting

Absolute low acting

Deviation high acting

Deviation low acting

Inside band acting

Outside band acting

RTD TYPE

RANGE

385

-200 to +600°C

-328 to +1100°F

392

-200 to +600°C

-328 to +1100°F

OHMS

1.0 to 320.0

Program Lock

Integral Action Lock

Auto/Manual Mode Select

Setpoint Ramp Enable

Reset Alarms

Setpoint 1/Setpoint 2 Select

Local/Remote Setpoint Select Serial block print

TC TYPE

RANGE

mV

WIRE COLOR

ANSI

BS 1843

T

-200 to +400°C

-328 to +752°F

blue (+)

red (-)

white (+)

blue (-)

E

-200 to +750°C

-328 to +1382°F

violet (+)

red (-)

brown (+)

blue (-)

J

-200 to +760°C

-328 to 1400°F

white (+)

red (-)

yellow (+)

blue (-)

K

-200 to +1250°C

-328 to +2282°F

yellow (+)

red (-)

brown (+)

blue (-)

R

0 to 1768°C

+32 to +3214°F

black (+)

red (-)

white (+)

blue (-)

S

0 to 1768°C

+32 to 3214°F

black (+)

red (-)

white (+)

blue (-)

B

+149 to +1820°C

+300 to +3308°F

grey (+)

red (-)

no standard

N

-200 to +1300°C

-328 to +2372°F

orange (+)

red (-)

orange (+)

blue (-)

-5.00 to +56.00

no standard

no standard