Products
MODEL 155 GENERAL PURPOSE TRANSDUCER MONITOR/ALARM SYSTEM
Description
The Model 155 assembly consists of eight single-channel signal conditioner cards and four dual-channel alarm cards. The unit monitors acceleration, velocity, displacement, RPM, pressure, or any other critical parameter and provides AC voltage, RMS-DC voltage and 4-20mA current outputs. Two setpoints per signal are settable on the alarm cards, which will hold an over- or under-setpoint alarm condition until reset. Alarms can drive external relays for signaling purposes.
Many configurations are available - click here for a list of available options.
Specifications
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Input: Voltage, from accelerometer or other transducer; 4-20mA loop can also be monitored Input monitor: Card-mounted BNC allows temporary direct connection to hardwired accelerometer with other monitoring/logging equipment Accel excitation: 4mA ±2% at 24VDC to input connection; switchable on/off; -24VDC available on input terminal block Input gain: 0.1, 1.0, or 10, jumper selectable Lowpass filter: 15kHz, or customer specified Highpass filter: 15Hz, or customer specified Integration: Zero, one, or two stages of integration, with unity gain at 307Hz or customer specified frequency Output gain: 1.0, 10, or 100, jumper selectable; 10:1 attenuation trimpot adjustment
Fault indication: If accelerometer input is open/shorted or excitation is off, output is clamped to zero and sensor fault LED lights
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Input signal: RMS-DC output from signal card; can be acceleration,
velocity, displacement, or other signal
Level 1 alarm: Trips when input goes above or below (jumper selectable) trimpot settable level; lights yellow Warning LED after 10 second nuisance delay Level 2 alarm: Trips when input goes above or below (jumper selectable) trimpot settable level; closes relay contact and lights red Alarm LED after 5 second nuisance delay External relays: Provision to drive external relays on Warning and Alarm trips Monitor voltage: One pushbutton per setpoint adjustment connects setpoint voltage to monitoring terminal block for voltmeter connection; when neither button is pressed, buffered input voltage is passed to monitor connection Channel reset: One pushbutton per channel resets Warning and Alarm trips; both alarms light for nuisance delay time when button is pressed; any channels still in an alarmable state will remain set; also activated at system powerup
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Cabinet: NEMA-rated steel box, 14" high x 12" wide x 6.5"
deep
Connections: Alarm card voltage outputs and Alarm relay contacts on terminal blocks; buffered input signals on BNC connectors Master reset input: Activates all alarm channel resets at once Voltmeter: Optional LCD voltmeter and channel select switch allows monitoring of signal card output levels and alarm setpoints Power: 115VAC 50/60Hz to terminal block; 24VDC version available
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