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 e 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 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.
4.
MEMORY:
Nonvolatile E
2
PROM retains all programmable parameters and
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 M
Ω
all types
Lead resistance effect
: 0.25 µV/
Ω
Cold junction compensation
: Less than ±1°C (
±
1.5
°
C max), error over 0
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 M
Ω
).
V
IN MAX
= 5.25 VDC
,
V
IL
= 0.85 V max., V
IH
= 3.65 V min.,
I
OFF
= 1µA max.
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
