Precision Digital PD540 Nova Process & Temperature Controller

Last Updates: 24/10/2020

Precision Digital PD548-6RB-00


Lead Time: 1 to 2 weeks

Part Number: PD548-6RB-00  Categories: ,

Email Us: sales@celectric.com.my
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sku: PD548-6RB-00 
Product Type: Auto-Tune PID Controller 
Input: Current (4-20 mA), Voltage (0-10 V), Thermocouple, RTD 
Output Options: (1) Relay, (2) 4-20 mA 
Power: 100-240 VAC 
Approvals: CE, C-UL Recognized 
Display Category: LED, Dual Line 
Display: Dual Line, 4 Digits, Red LED 
DIN Size: 1/4 DIN 
Serial Comms: None 
Warranty: 3 years 
Digital Inputs: None 
Product Series: Nova 
Product Family: PD540 
Product category: Temperature Controllers 
Product Application: Temperature, Process

The Nova PD540 is a digital temperature controller with auto-tuning PID capabilities that is available in 1/16, 3/16, 1/8, and 1/4 DIN sizes. Models include standard one-directional control (i.e. heating or cooling) or bi-directional heating and cooling control. One of four user programmable set points may be selected for PID control in the form of time proportional relay on/off output, time proportional voltage pulse output, or 4-20 mA signal control. Its universal input accepts 23 input varieties, including thermocouple, RTD, and voltage inputs, and it can be easily configured for a 4-20 mA input. It is available with up to three (3) relays, two (2) 4-20 mA analog outputs, two (2) digital inputs, and an RS485 serial communication option which includes protocols for master/slave set point control, Modbus® ASCII and RTU, as well as PC software.

Display: Dual 4 digits, red LED, -1999 to 9999

Inch (mm)
SP Display
Inch (mm)
oz (g)
1/160.45 (11.3)037 (9.5)7.0 (198)
3/160.55 (14.0)0.47 (12.0)11.4 (324)
1/8 (H)0.78 (19.8)0.45 (11.5)10.8 (306)
1/8 (V)0.54 (13.6)0.41 (10.5)10.7 (304)
1/40.81 (20.5)0.43 (11.0)13.7 (389)

Front Panel: Panel gasket provided. 1/16 & 1/8 DIN: IP65, 3/16 & 1/4 DIN: IP55
Programming Methods: Four front panel buttons and Modbus
Number of Set Points: Four programmable set points
Noise Filter: Programmable 1 to 120 seconds or off
Display Update Rate: 4/second
Password: Restricts modification of programmed settings.
Non-Volatile Memory: Settings stored for a minimum of 10 years
Power: 100-240 VAC, 50/60 Hz, 10 W
Required Fuse: UL Recognized, 1 A, 250 V, slow-blow
Isolation: 2300 V input/output-to-power line; 4 kV relay output-to-input/output/power line.
Operating Temperature: 10 to 50°C
Storage Temperature: -40 to 85°C
Relative Humidity: 20 to 90% non-condensing
Enclosure: 1/16, 3/16, 1/8(H), 1/8(V), 1/4 DIN; impact-resistant plastic; color: black
Approvals: UL & C-UL Recognized, CE Compliant
UL File Number: E244207; Process Control Equipment
Warranty: 3 years parts & labor

Temperature Inputs

Inputs: Factory calibrated, field selectable: J, K, T, E, B, R, S, L, U, N, W, Platinel II thermocouples,
and 100 Ω platinum RTD (0.00385 or 0.00392 curve)
Cold Junction Reference: Automatic or off
Offset Adjustment: Four programmable input bias zones
Sensor Break: Up or down scale, user selectable; display reads S.OPN; alarm relays will follow the up or
down scale selection.

TypeRange (°C)Range (°F)Accuracy

Thermocouple Inputs

K1-200 to 1370-300 to 25002500>0ºC: ± 0.1% FS ± 1count
<0ºC: ± 0.2% FS ± 1 count
K2-199.9 to 999.90 to 2300
J-199.9 to 999.9-300 to 2300
T-199.9 to 400.0-300 to 750
E-199.9 to 999.9-300 to 1800
B0 to 180032 to 3300>400ºC: ± 0.15% FS ± 1 count
<400 ºC: ± 5% FS± 1 count
R0 to 170032 to 3100±0.15% FS ± 1 count
S0 to 170032 to 3100
L-199.9 to 900.0-300 to 1600>0ºC: ± 0.1% FS ± 1 count
<0ºC: ± 0.2% FS ± 1 count
U-199.9 to 400.0-300 to 750
N-200 to 1300-300 to 2400>0ºC: ± 0.1% FS ± 1 count
<0ºC: ± 0.25% FS ± 1 count
W0 to 230032 to 4200±0.2% FS ± 1 count
Platinel II0 to 139032 to 2500±0.1% FS ± 1 count

RTD Inputs

PtA-199.9 to 850.0-300 to 1560±0.1% FS ± 1 count
PtB-199.9 to 500.0-199.9 to 999.9
PtC-19.99 to 99.99-4.0 to 212.0±0.2% FS ± 1 count
JPtA-199.9 to 500.0-199.9 to 999.9±0.1% FS ± 1 count
JPtB-150.0 to 150.0-199.9 to 300
*Performance within recommended operating conditions (10 to 50 ºC, 20 to 90% RH)

Process Inputs

Inputs: Field selectable: 0.4 to 2.0 V, 1 to 5 V, 0 to 10 V, -10 to 20 mV, 0 to 100 mV. 4-20 mA input requires 100 Ω resistor connected across input terminals (order P/N: PDX-RES1).
Accuracy: ±0.1% FS ±1 count
Decimal Point: Up to 3 decimals: 9.999, 99.99, 999.9 or 9999
Calibration: All inputs are calibrated at the factory
Scale Range: User programmable over entire range
Transmitter Supply: 14 to 18 VDC @ 20 mA; available at terminals OUT2 or OUT3, instead of retransmitting analog output; selection through front panel.


Ratings: 1 Form C (SPDT) standard; rated 3 A @ 30 VDC or 3 A @ 250 VAC resistive load. 1 or2 Form A (SPST) optional; rated 1 A @ 30 VDC or 1 A @ 250 VAC resistive load.
Relay Operation: Time proportional PID control, on/off control, forward or reverse (fail-safe) alarm, or run status
Cycle Time: 1 to 300 seconds; time proportional PID control only
On/Off Hysteresis: For standard skus, 0-10.0% of sensor range for independent high and low hysteresis limit. For heating & cooling skus, 0-10.0% of sensor range full hysteresis band.
High/Low Alarm: User may program any alarm for absolute high or low trigger values.
Deviation Alarm: User may program any relay for high, low, or high/low range set point deviation alarm.
Alarm Deadband: 0-100% FS, user selectable
Alarm Delay: 0 to 99 minutes and 59 seconds
Reverse Operation (Fail-Safe): Programmable, independent for each alarm. Relay coils are energized in non-alarm condition. In case of power failure, relays will go to alarm state.
Forward Operation: Relay coils are energized in alarm condition. In case of power failure, relays will go to non-alarm state.
Auto Alarm Initialization: Normal and standby operation independent for each alarm. Normal alarms will reflect the state of the input to the controller at all times. Standby alarms will not trigger if the change to alarm state is a result of power up cycle, set point change, or alarm configuration change.
Run Status: Relays will energize when PID outputs are running.

Analog Outputs

Scaling Range: Retransmitting 4-20 mA outputs can be scaled for any display range.
Accuracy: ±0.1% FS
Availability:1/16 & 3/16 DIN: 1 standard, 1 optional 1/8 & 1/4 DIN: 2 standard
Output Operation: 4-20 mA PID control, time proportional voltage pulse PID control, or 4-20 mA retransmitting
Ratings: Continuous 4-20 mA PID or retransmitting: 600 Ω max Time Proportional PID: 15 VDC pulse high, less than 0.1 VDC pulse low; 600 Ω minimum, current limited at 30 mA
Cycle Time: 1 to 300 seconds; time proportional PID control only
Power: Internally powered 4-20 mA output
Isolation: 500 V input-to-output
Output Loop Resistance: 600 Ω max

Digital Inputs

Configuration Two contacts, two operating modes
Contacts: Normally open switches (external excitation not required) or open collector transistor
Open Circuit Voltage: Approximately 5 VDC
Logic Levels: LO = 0 to 0.8 VDC, HI = 4.7 to 28 VDC
Operation Modes: Mode 1: Control output run or stop, selection of set point 1 or 2. Mode 2: Selection of set points
1 to 4.

Serial Communications

Compatibility: EIA-485
Protocol: PC, Modbus (ASCII, RTU), Sync (Master/Slave SP Control)
Address: 1 to 99 (Max 31 units connected)
Baud Rate: 600 to 19,200 bps
Transmit Time Delay: 0 to 100 ms
Data: 7 or 8 bit, automatic when using Modbus protocol
Stop Bit: 1 or 2
Parity: None, even, or odd

Nova Multi-Monitoring PC Software

Any Nova Controller with the serial communications option can be configured to interface with the Nova Multi-Monitoring PC software. Up to 30 controllers can be monitored and operated, and each can use independent data logging.

  • Easy to Set Up and Use
  • Connect up to 30 Nova Controllers
  • View PV, SP, and Alarm Status Simultaneously
  • Control Set Points
  • Log, View, and Save Data in Spreadsheet Files
  • Free Download (click here)


System Requirements: Windows® 9598ME2000XPVista7
Communications: An RS-232 to RS-485 or USB to RS-485 converter may be used for communication with a PC and Nova Multi-Monitoring Software.
Number of Units: Up to 30 Nova Controllers
Baud Rate: 9,600 to 19,200 bps
Data Logging: Graph and save data as .hdr format. Each controller saves graphs independently. Data exportable in spreadsheet format.
Logging Interval: 1 second to 24 hours

Simultaneous Monitoring

Simultaneously monitor up to 30 Nova Controllers and view the PV, SP, and alarm status for all connected controllers. The main view screen also displays the basic sku numbers of all connected units. Any series
of Nova Controllers with the serial communications option may be monitored with this software.

Simultaneously View Up to 30 Nova Controllers

Remotely Control Set Points

Program each of the 4 set points through a detailed operation screen available for every connected controller. In addition, control outputs can be set to run or stop, autotuning enabled, and automatic or manual control established.

Monitor and Control Common Parameters

Data Acquisition

PV and SP data can be logged independently for each unit. This data can be graphed using the Data Viewer for quick and clear analysis. Logged data can be exported into spreadsheet format.

View Logged Data Graphs and Export Data

PD540 & PD541 Connections


PD542 & PD543 Connections

PD544 & PD545 Connections

PD546 & PD547 Connections

PD548 & PD549 Connections

PD540 & PD541 Cutouts

1/16 DIN (48 x 48)

PD542 & PD543 Cutouts

1/8 DIN (H) (96 x 48)

PD544 & PD545 Cutouts

3/16 DIN (72 x 72)


PD546 & PD547 Cutouts

1/8 DIN (V) (48 x 96)

PD548 & PD549 Cutouts

1/4 DIN (96 x 96)

Data Sheet:LDS540_1 Datasheets

Instruction Manual: LIM540_1 Instruction Manuals

Quick Start Manual:

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