uB34 / uB35
uB34/35: Platinum RTD Field Input Module
• Field Input: -100 to +100°C or 0 to 600°C ranges, 3Hz
• Host Output: 0-5V or ±5V ranges
The uB34 and uB35 models condition and convert a Platinum RTD sensor or resistance signal to a scaled 0-5V or ±5V output. For two and three-wire RTDs, use the uB34. Four-wire RTDs use the uB35. Both models provide sensor excitation, linearization, lead-wire compensation, lead-break or sensor burnout protection, and input isolation.more >
Acromag’s microBlox® uB Series I/O modules offer a compact, high-performance solution for interfacing sensors and field devices with data acquisition systems. uB signal conditioning modules are ideal to isolate, filter, convert and amplify a wide variety of signal types for test, measurement and control systems. Just plug uB modules into 4, 8, or 16-channel backpanels in any mix for a high-density analog I/O interface. Channel-to-channel isolation provides optimal noise and surge protection from ground loops, spikes, and high common mode voltages.
The uBTA carriers are used with Acromag’s microBlox® signal conditioning modules to create powerful alarms that also provide a voltage/current transmitter output. The plug-in modules offer the convenience of wireless field programming on a smartphone or tablet.
Bluetooth® wireless technology versions enable configuration using a smart phone or tablet. Acromag’s Agility™ app, available for Android™ and iOS® mobile devices, helps you vary input/ output ranges and scaling to your specific application. The Agility app can also set an alarm output function with a setpoint limit and deadband. Other app functions include polling inputs, trending values in a sharable chart, updating calibration, and diagnostic troubleshooting.
For cost-sensitive projects, a commercial-grade version is available (-CG models). These units offer similar performance, but over a limited temperature range and lack hazloc approvals.
Backpanels provide power, I/O wiring terminals, and host access to an industry-standard analog signal bus. Modules are hot-swappable without screws. Data acquisition boards can access all host I/O signals on the DB25 bus connector.
Agility™ Config Tool is available for free.
Fixed ranges: ±100°C or 0-100/200/600°C. User-configurable -B models: inside -200˚C to +850˚C range limits for 100Ω Pt RTD sensors, or linear resistance.
16-bit ADC. uB34-01: 1/12431. uB34-02: 1/6118. uB34-03: 1/12052. uB34-04: 1/16976.
uB35: 500uA. uB34: 1mA (Dual matched 500uA sources at ± leads).
Lead-Wire Compensation: Up to 25Ω/lead and requires balanced ±sensor leads (same size, length, type).
Lead Resistance Effect: Less than ±0.01% of output shift per ohm of lead resistance with a maximum shift less than ±0.1% for up to 10Ω per ±lead.
Lead Break Detection
-B model: Upscale, or selectable upscale/downscale.
Input Sample Rate: 40sps.
Normal Mode (Bandwidth): -3dB at 3Hz, typical.
Protection: TVS & diode clamps built-in plus additional protection on back-panel.
Common Mode Rejection: 130dB typical, 50-60Hz.
Fixed ranges: 0-5V per range model. User-configurable -B models: 0-5V/±5V selectable.
16-bit DAC, 0-5V: 1/26305. ±5V: 1/52610.
Current Drive: 5V into 1KΩ minimum or 5mA maximum.
Response Time: Output Step 0-98% in 250ms, typical
Power Consumption: 0.23W, or 46mA from +5V maximum.
I/O Resolution: Effective resolution is least of input (A/D) & output (D/A) resolution (see Input).
Non-Linearity: Better than ±0.05%, typical.
Accuracy: Better than ±0.1%. 0.05% typical. -CG models: Better than ±0.125%. 0.075% typical.
Noise: Better than 0.06% of span p-p rms.
Ambient Effect: Better than ±80ppm/°C.
Height: 1.380” with connectors, 0.970”without. Width: 0.425”. Length: 1.425”.
Operating Temperature: -40 to 80°C (-40° to 176°F). -CG models: 0 to 55°C (32 to 131°F).
Storage Temperature: -40 to 85°C (-40° to 185°F).
Relative Humidity: 0 to 95% non-condensing.
Power Requirement: 5V powered.10-32V power optional (requires uBDC-1 power module & backpanel.)
Safety Isolation: Field channels are individually isolated field channel-to-field channel and from the field to the host I/O bus (host group includes 5V power) for commonmode voltages up to 250V AC, or 354V DC off DC power ground, on a continuous basis (will withstand 1500VAC HIPOT/dielectric strength test for one minute without breakdown). This complies with test requirements of ANSI/ISA-82.01-1988 for voltage rating specified.
Shock and Vibration Immunity Conforms to: IEC 60068-2-6: 10-500 Hz, 4G, 2 hours/axis, for sinusoidal vibration. IEC 60068-2-64: 10-500 Hz, 4G-rms, 2 hours/axis , for random vibration. EC 60068-2-27: 25G, 11ms half-sine, 18 shocks at 6 orientations, for mechanical shock.
Electromagnetic Compatibility (EMC) Compliance
Minimum immunity per BS EN 61000-6-1 (2007): CE marked, per EMC Directive 2004/108/EC. Electrostatic Discharge Immunity (ESD), per IEC 61000-4-2. Radiated Field Immunity (RFI), per IEC 61000-4-4. Electrical Fast Transient Immunity (EFT), per IEC 61000-4-4. Surge Immunity, per IEC 61000-4-5. Conducted RF Immunity (CRFI), per IEC 61000-4-6.
Class B product with emissions per BS EN 61000-6-3 (2007+A1:2011): enclosure port, per CISPR 16. Low voltage AC mains port, per CISPR 16.
Approvals: CE compliant. RoHS Compliant. UL/cUL Class 1, Division 2, Groups ABCD. ATEX Zone 2. No UL or ATEX on -CG models.
Features & Benefits
- Wide variety of input and output ranges
- Mixes with different I/O types on compact 4, 8, or 16 channel backpanels
- Select fixed I/O range models or Bluetooth wireless technology user-configurable models
- Cost-saving commercial-grade versions available for less demanding applications
- Android® and iOS® apps simplify wireless configuration with a smartphone or tablet
- Mobile app configures I/O ranges, sets scaling, calibrates and performs diagnostics
- Optional alarm function with setpoint and deadband control driving 0/5V host output
- Poll and trend I/O values to sharable charts
- High accuracy, noise immunity, and stability
- Isolated field-to-host and channel-to-channel (1500Vac peak, 250Vac/354Vdc continuous)
- Over-molded I/O circuits offer superior shock, vibration, moisture, and dust protection.
- Wide operating temperature range
- UL/cUL Class I, Div 2, ABCD and ATEX Zone 2 hazardous location approvals
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