Voltage input conditioners accept signals from ±10mV to ±60V, and current input conditioners accept signals of 0/4 to 20mA. Accepted thermocouple types are J, K, T, R, and S. Type Pt 100 RTDs can be 2-, 3-, or 4-wire. Potentiometer inputs can range from 0-100 ohms to 0-10k ohms. Strain gage transducers can have a resistance range of 100 ohms to 2k ohms, with sensitivities of 2mV/V or 3mV/V. Frequency input signals can be TTL or zero crossing with ranges from 0-500Hz to 0-100kHz. The 2-wire transmitter module provides loop power and accepts a 4 to 20mA input signal. Additional models offer isolated field-side current and voltage outputs. Current output ranges are 0 to 20 and 4 to 20 milliamp, while voltage output ranges are 0 to 10V and ±10V.
Linearization of thermocouple signals is accomplished by a hardware implemented piece-wise approximation technique. The difference between sensor nonlinearity and the linearization provided by the 8B module is specified as conformity error. 8B modules use up to five segments to correct nonlinearity, which results in conformity errors as low as ±0.015% span. Cold junction compensation error for thermocouple inputs is ±0.5°C at 25°C ambient.
Design-in 8B accessories include a selection of standard and DIN backpanels (1, 2, 4, 8, and 16 channels) that provide screw-terminal inputs and outputs, as well as a DB25 header connector. The DB25 cables are available in 1, 2, or 7 meter lengths. Moreover, a power supply module in the same 8B form-factor is offered to accommodate input voltages of 7 to 34VDC and provide 5VDC output at 2A to power any combination of 8B signal conditioners. This 8BPWR-2 module plugs into its own socket on the backpanel. A DIN rail mounting accessory, the 8BP01, is offered as a 5VDC powered or 7 to 34VDC powered DIN rail mount carrier suitable for any 8B module. The 8B carrier can be mounted on any standard DIN rail (EN 50022-35 and EN 50035-G32).
Each 8B module isolates the field-side input or output signal with an optical or galvanic isolation barrier rated at 1500Vrms. Common-mode rejection is 120dB; by incorporating a 5-pole filter, normal-mode rejection is 85dB at 60Hz.
Operation and storage temperature is -40 C to +85 C, and relative humidity range is zero to 95% noncondensing. All models are CE Compliant and meet the requirements of EN61000-6-4 (radiated/conducted emissions) and EN61000-6-2 (ESD/RF/EFT immunity). For operation in hazardous environments, North American Class I, Division 2, and European Group II, Category 3, approvals are pending.
Dataforth Corporation was established in 1984 and is a worldwide leader in the design and manufacture of signal conditioning, data acquisition, and data communication products for industrial and institutional markets. The company is ISO9001:2000 registered. For additional information, call 800-444-7644 toll-free, or e-mail firstname.lastname@example.org