Isolated Analog Signal Conditioning Blocks

Intelligent Instrumentation's PCI-5B series is a family of low-cost, high-performance signal conditioning products for analog input/output signals. The product line includes: signal conditioning blocks (or modules) that interface with a variety of external sensors (including voltage, current, thermocouple, strain-gage, and RTD inputs), compatible termination panels, rack-mount enclosures, and a 5V power supply.

Each PCI-5B block provides a single channel of isolated analog input or output. The input blocks accept signals from external sources, then filter, isolate, amplify, and convert these signals to high-level analog voltage outputs. Output blocks produce 0 to 20mA or 4 to 20mA current loop signals from voltage inputs for a variety of control applications.

The PCI-5B blocks employ transformer isolation to offer a high level of safety when interfacing computer systems to external equipment processes. The isolation barrier and protection devices prevent damage to expensive control room equipment. Common-mode voltages up to 1500Vrms and up to 240V differential can be safely applied. Isolation also prevents troublesome ground loops, which can disrupt the measured signal.

Superior performance is provided by these industry-standard blocks in several areas:

• Low output noise
• 50M ohms input impedance, which means less loading of field devices

Features common to all PCI-5B signal conditioning blocks include 1500Vrms continuous common-mode voltage isolation, ANSI/IEEE C37.90.1-1989 transient protection, and chopper-based amplification, which assures low drift (±1mV/°C) and excellent long-term stability. All blocks include six poles of filtering, providing 95dB of normal mode rejection (NMR) at 60Hz to minimize noise above 4Hz. Also all blocks are hard potted and are identical in pin-out and size (2.28" x 2.26" x 0.6"), which allows you to mix and match different input types on the same termination panel.

Parameter	Specifications
Mechanical Dimensions	2.28" x 2.26" x 0.60"
	(58mm x 57mm x 15mm)
Environmental:
Operation Temperature Range	25° C to 85° C
Storage Temperature Range	-40° C to 85° C
Relative Humidity	0 to 95% noncondensing
RFI Susceptibility	±0.5% span error @400MHz, 5W, 3ft

• Direct Interface to Popular Sensors and Signal Sources:

1. Thermocouples
2. Millivolt and Voltage Sources
3. RTDs
4. Frequency Sources
5. Process Currents (0-20mA)
6. Strain Gages

• Analog Output Blocks for Process Control
• High Accuracy, Low Drift
• Complete Signal Conditioning Functions:

1. 1500Vrms Common-Mode Isolation
2. 240V Input Protection
3. Filtering, Amplification, Linearization
4. ANSI/IEEE C37.90.1.1989 Transient Protection