Omega Vehicle Security OM5-C OM5-WMV/WV, Analog Voltage Input Modules, Wide Bandwidth, Features

OM5-WMV/WV

Analog Voltage Input Modules, Wide Bandwidth

FEATURES

●ACCEPTS MILLIVOLT AND VOLTAGE LEVEL SIGNALS

●HIGH LEVEL VOLTAGE OUTPUTS

●1500Vrms TRANSFORMER ISOLATION

●ANSI/IEEE C37.90.1-1989 TRANSIENT PROTECTION

●INPUT PROTECTED TO 240VAC CONTINUOUS

●100dB CMR

●10kHz SIGNAL BANDWIDTH

●±0.05% ACCURACY

●±0.02% LINEARITY

●±1∝V/°C DRIFT

●CSA CERTIFIED, FM APPROVED, CE COMPLIANT

●MIX AND MATCH OM5 TYPES ON BACKPANEL

DESCRIPTION

Each OM5 wide bandwidth voltage input module provides a single channel of analog input which is amplified, isolated, and converted to a high level analog voltage output (Figure 1). This voltage output is logic-switch controlled, allowing these modules to share a common analog bus without the requirement of external multiplexers.

The OM5 modules are designed with a completely isolated computer side circuit which can be floated to ±50V from Power Common, pin 16. This complete isolation means that no connection is required between I/O Common and Power Common for proper operation of the output switch. If desired, the output switch can be turned on continuously by simply connecting pin 22, the Read-Enable pin to I/O Common, pin 19.

The input signal is processed through a pre-amplifier on the field side of the isolation barrier. This pre-amplifier has a gain-bandwidth product of 5MHz and is bandwidth limited to 10kHz. After amplification, the input signal is chopped by a proprietary chopper circuit. Isolation is provided by transformer coupling, again using a proprietary technique to suppress transmission of common mode spikes or surges. The module is powered from +5VDC, ±5%.

A special input circuit provides protection against accidental connection of power-line voltages up to 240VAC.

+EXC		4		Anti-Aliasing	Isochopper™
		NC		Filter		LPF	20
	4		Surge		Amplifier		VOUT
+In		6			Pat Pending
	3		Suppression
VIN			and				19
		5
			Protection		+V	–V	I/O Common
–In
	2
		3
–EXC							22
		NC			Isolated
	1						RD EN\
					Computer-Side
					Power
Backpanel
Term Block
			1
			2
			+V				17
				Isolated			+5V
						Power
			–V	Field-Side
						Oscillator
				Power			16
							Power Common
FIGURE 1. OM5-WMV/WV Block Diagram.

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