uB42: 2-Wire Transmitter Field Input Module with Loop Excitation

Field Input: 0-20mA or 4-20mA DC ranges
Host Output: 0-5V, 1-5V or ±5V ranges

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 uB42 model conditions and converts a DC process current field input signal from a 2-wire transmitter to a scaled 0-5V or ±5V output. It provides field excitation (12V/22mA) for the transmitter and is useful to isolate non-isolated transmitters. This module can also interface AC current signals with the model 5020-350 toroid sensor producing a 0 to 11.17mA input.

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 shareable chart, updating calibration, and diagnostic troubleshooting.

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.

Performance Specifications

See Backpanels for additional system specifications.

Field Input

Field Range:
Fixed ranges: 0-20mA or 4-20mA
User-configurable -B models: 0-20mA DC
Resolution:
16-bit ADC. 4-20mA: 1/24319. 0-20mA: 1/30399
When used with AC Current Sensor 5020-350: 1/16978 for 0-11.17mA range
Resistance: 47.5Ω ±0.1%. Input shunt to ground or loop load.
Excitation: +13V loop power supply. 12V to transmitter and 1V for internal input shunt resistor.
Input Sample Rate: 1200sps
Normal Mode (Bandwidth): -3dB at 100Hz, 180Hz typical
Protection: TVS & diode clamps built-in plus additional protection on back-panel.
Common Mode Rejection: 130dB typical, 50-60Hz

Host Output

Host Range:
uB42-01: 0-5V. uB42-02: 1-5V. uB42-03: 0-5V
uB42-B: User-configurable ±5V
Resolution:
16-bit DAC. 0-5V: 1/26305. ±5VDC: 1/52610
1-5V: 1/21044
Drive Capability: 5V into 1KΩ minimum or 5mA maximum load
Response Time: Output Steps 0-98% in 6ms, typical

General

Power Consumption: 0.25W max. with no excitation load, 0.6W max. or 120mA from 5V with 20mA excitation load.
I/O Resolution:
Effective resolution is the least of input (A/D) and output (D/A) resolution with 0-20mA/0-5V: 1/30399
4-20mA/1-5V 1/21044
0-11.17mA/0-5V: 1/16978
Accuracy: Better than ±0.1%. 0.05% typical
Non-Linearity: Better than ±0.05%, typical
Noise: Less than 0.06% of span p-p, rms
Ambient Effect: Less than ±80ppm/°C
Dimensions:
Height: 1.380” with connectors. 0.970” without
Width: 0.425”
Length: 1.425”

Environmental

Operating Temperature: -40 to 80°C (-40° to 176°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 common-mode 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
Emissions
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

Additional information