SP333: Four-Wire Thermocouple / milliVolt Splitter

Description

The SP333 is a high-performance signal splitter that converts one millivolt or thermocouple input into two isolated proportional control signals. A variety of current and voltage output ranges are supported. Power connects on a terminal block, a rail bus, or both for redundancy.

High-voltage isolation separates the input from power and each output circuit. The isolation protects from surges, reduces noise, and eliminates ground loop errors.

Setup is fast and easy with a USB connection to your PC and our Windows software. Acromag’s Agility™ mobile app enables configuration on an Android smart phone or tablet. Software simplifies I/O range scaling, calibration, and advanced signal processing capabilities.

These rugged instruments withstand harsh industrial environments to operate reliably across a wide temperature range with very low drift. They feature high immunity to RFI, EMI, ESD, and EFT, plus low radiated emissions.

Performance Specifications

IMPORTANT: To prevent ground loop error between a grounded PC and a grounded input signal, Acromag strongly recommends use of a USB isolator like Acromag’s USB-Isolator when configuring a SP330 Series transmitter.

USB Interface:

USB Connector: USB Mini-B type socket, 5-pin. 5.0 meters cable length max. No driver required, uses Windows HID drivers.
USB Data Rate: 12Mbps. USB v1.1 and 2.0 compatible
USB Transient Protection: Transient voltage suppression on power and data lines

Input (Passive)

Default Configuration/Calibration:
Input: TC J, -210 to 760°C, med. filter, break: up
Output: 4 to 20mA

Input Ranges and Accuracy:
Input                        Range                                  Accuracy*
TC J          -210 to 760°C (-346 to 1400°F)            ±0.5°C
TC K         -200 to 1372°C (-328 to 2502°F)          ±0.5°C
TC T         -260 to 400°C (-436 to 752°F)               ±0.5°C
TC R           -50 to 1768°C (-58 to 3214°F)             ±1.0°C
TC S           -50 to 1768°C (-58 to 3214°F)             ±1.0°C
TC E        -200 to 1000°C (-328 to 1832°F)           ±0.5°C
TC B          260 to 1820°C (500 to 3308°F)           ±1.0°C
TC N        -230 to 1300°C (-382 to 2372°F)          ±1.0°C
mV           -100 to 100mV                                           ±0.1mV
*Error includes the effects of repeatability, terminal point conformity, and linearization (but not CJC error).

Thermocouple Reference (Cold Junction Compensation): ±0.2°C typical, ±0.5°C maximum at 25°C
Ambient Temperature Effect: Better than ±80ppm/°C (±0.008%/°C)
Scaling Adjust: 0 to 95% of range, typical
Full Scale: 5 to 100% of full scale range, typical
Lead Break (Sensor Burnout) Detection: Upscale/downscale ±5% full scale range typical
Input Over-Voltage Protection: Bipolar Transient Voltage Suppressers (TVS), 5.6V clamp level typical.
Resolution:
milliVolt input: 0.0025% (1 part in 40,000)
Thermocouple input: 0.1°C
Input Impedance:
Current input: 24.9 ohms
Voltage input: 15M ohms
Noise Rejection (with High Filter):
Normal mode @ 60Hz: >80dB
Common mode @ 60Hz: >134dB

Output (Two Signals, Active)

Output Range:
Range                  Over-Range                            Resolution
±10V                            ±10.5V                                1 part in 62415
±5V                              ±5.25V                                1 part in 31208
0 to 10V             –0.5527 to +10.5V                  1 part in 59240
0 to 5V             –0.27634 to +5.25V                  1 part in 60262
0 to 20mA          –1.1054 to 21mA                   1 part in 58596
4 to 20mA          –1.1054 to 21mA                   1 part in 46877

Output Load:
Voltage output: 1K ohms minimum
Current output: 0-550 ohms

Output Response Time (for step input change):

Time to reach 98% of final output value (typical)
No filtering:          14 milliseconds
Low filter:             41 milliseconds
Medium filter:   137 milliseconds
High filter:        1141 milliseconds

Output Ripple: Less than ±0.1% of output span

Environmental

Operating temperature: -40 to 75°C (-40° to 167°F)
Storage temperature: -40 to 85°C (-40 to 185°F)
Relative humidity: 5 to 95% non-condensing
Power Requirement: 6-32V DC external supply, 1.5W max
Isolation: 1500V AC peak. 250V AC (354V DC) continuous between input, output, and power circuits.
Shock and Vibration Immunity:
Vibration: 4g, per IEC 60068-2-64
Shock: 25g, per IEC 60068-2-27
Electromagnetic Compatibility (EMC) Compliance:
Radiated Emissions: BS EN 61000-6-4, CISPR 16
RFI: BS EN 61000-6-2, IEC 61000-4-3
Conducted RFI: BS EN 61000-6-2, IEC 61000-4-6
ESD: BS EN 61000-6-2, IEC 61000-4-2
EFT: BS EN 61000-6-2, IEC 61000-4-4
Surge Immunity: BS EN 61000-6-2, IEC 61000-4-5
Approvals:
CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD, ATEX / IECEx Zone 2.
Ex II 3 G Ex nA IIC T4 Gc -40°C ≤ Ta ≤ +80°C

Physical

General: General-purpose enclosure designed for mounting on 35mm “T-type” DIN rail.
Case Material: Self-extinguishing polyamide, UL94 V-0 rated, color light gray. General-purpose NEMA Type 1 enclosure.
I/O Connectors: Removable plug-in terminal blocks rated for 12A/250V; AWG #26-12, stranded or solid copper wire.
Dimensions: 17.5 x 114.5 x 99.0 mm (0.69 x 4.51 x 3.90 inches)
Shipping Weight: 0.22 kg (0.5 pounds) packed