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 Scientech’s NUSI modules are form-fit-function replacements for the original Hagan modules.
Click over folds below to expand information |
The OCA800 One Channel Isolator replaces the obsolete Hagan 7100 single channel isolator, and has the following functions:
- Electrically isolates an input signal from faults at the output or on the power line, to prevent output-side problems from affecting safety-related inputs.
- Acts as a signal buffer (repeater) that enables more connections to the output.
- Performs voltage-to-current signal conversion.
 View full product sheet (PDF, 185kB)
The MTH800 Summator replaces the obsolete Hagan 7100 summators, and offers multi-functional options through jumper-configurable selections and calibration adjustments on the main circuit board.
The MTH800 can use the Summer, Feedback, Low Gain plus Bias, and Calibrated Gain sections of the NUSI 800 Series master board assembly in various combinations to perform any of several different linear functions. Each circuit includes its own gain and bias or offset adjustments. Some circuits include inversion options. The calibrated gain is adjustable from 0.1 to 1.1, but also scalable at x1, x10 or x100.
View full product sheet (PDF, 159kB)
The HLS801 High/Low Signal Selector replaces the obsolete Hagan 7100 high and low signal selectors, and provides either high or low signal selection from two or three inputs as determined by user-configurable jumpers on the main PC board. User-defined gain and bias, and filtering and high/low limiting, can be applied to a selected signal through a mode panel in the side cover.
The only difference between the HLS801 and the NUSI 800 Series MSS801 Median Signal Selector (other than jumper settings on the main PC board), is the rear connector output pin configuration. The HLS801 uses pins M+ and N-; the MSS801 uses pins P+ and K-.
View full product sheet (PDF, 174kB)
The TMD801 Lead/Lag & Derivative Controller replaces the obsolete Hagan 7100 controller, and can be used to perform several time domain functions. The TMD801 can be configured as a lead, lag, lead-lag, dynamic compensator, or computational module.
The TMD800 can utilize the Lead, Lag, Filter and Feedback Summer sections of the NUSI 800 Series master board assembly in various combinations to perform any of several different time-based functions. Each circuit includes its own offset and timing adjustments. The Feedback Summer section includes individual gain settings to eliminate feedback oscillation, and an overall bias adjustment.
View full product sheet (PDF, 174kB)
The RTL851 Millivolt-to-Current Amplifier replaces the obsolete Hagan 7100 millivolt-to-current amplifier. The RTL851 accepts input from a resistance temperature detector, thermocouple, or low voltage source, and includes a personality module that corresponds to the input type. Offset and span adjustments in the input section adapt the input scale to a specific voltage range entering the output section. Zero, span, and compensation settings are controlled in the output section via potentiometers on the face plate.
View full product sheet (PDF, 174kB)
The PID801 & AMS820 Auto/Manual Controller System is an interdependent control system developed to interface with certain Westinghouse control systems. The PID801 is a rack-mounted controller that maintains a process variable at the desired setpoint using combinations of proportional, integral (reset), and derivative (rate) actions. The magnitude of each term in the transfer function is adjustable to optimize the time response of the controlled variable.
The AMS820 provides the interface for the control system, and the operator can select automatic or manual operation. In automatic mode, the operator can control the setpoint value provided to the PID. In both modes of operation, a meter indicates the value of the signal that is controlling the process.
View full product sheet (PDF, 206kB)
The CMM801 Multiplier/Divider replaces the obsolete Hagan 7100 multiplier/divider modules, and can be configured to perform multiplication, division, squaring or square root functions. When the CMM801 is used as a multiplier, it accepts two inputs that can be independently inverted, each having an adjustable scalar ranging from 0.02 to 1.0 and an overall variable gain from 1 to 10. Division is accomplished by accepting two signal inputs (divisor must be positive) that can be scaled from 0.02 to 1.0 with an overall gain adjustment ranging from 10 to 100.
View full product sheet (PDF, 174kB)
The GEN800 Function Generator replaces the obsolete Hagan 7100 function generator, and performs piecewise manipulation of a single input signal. Output functions include convex and concave curves, with increasing and decreasing slopes, and gull-wing functions.
The standard GEN800 and GEN801 provide up to eight breakpoints, with mode panel control of applicable settings for breakpoint and segment gain. The GEN 802 limits the function to four breakpoints, but moves the applicable controls to the front panel, and provides better control over large gain segments, such as in gull-wing configurations.
View full product sheet (PDF, 139kB)
The DAM800 Dual Alarm Module and SAM800 Single Alarm Module replace the obsolete Hagan 7100 signal comparators. The DAM800 Dual Alarm Module is a solid-state unit that produces a voltage or a contact closure when a conditioned input exceeds a preset limit. Each alarm channel is independent of the other, allowing two different setpoints. The DAM800 can operate in:
- Dual Mode: with two independent channels.
- Single Mode: with a single input feeding both alarm channels.
- Difference Mode: with the difference between two inputs feeding both alarm channels.
- Deviation Mode: with the difference between two inputs (A-B) feeding one alarm channel, and its inversion (B-A) feeding the other alarm channel.
The SAM800 has only a single alarm channel and can only operate in the Single Mode and Difference Mode. Each alarm channel can be configured to “trip” on a rising signal or on a falling signal. A trip can signal the solid-state relay to pass a signal (NO) or block a signal (NC). The output can be driven by either an external or internal wetting voltage. Input and output ranges are jumper-configurable for several possible ranges.
View full product sheet (PDF, 156kB)
The LPS801 Loop DC Power Supply replaces the obsolete Hagan 7100 loop power supplies. Hagan offered two models, the 137-121, which supplied 45 V dc, and the 137-122, which supplied 40 V dc. Both models were offered in one-, two-, and three-loop variations.
The LPS801 is a linear power supply with a modular construction that accommodates one to three power units. Each power unit is independent; one ac input corresponds exactly to one dc output. Each power unit provides a regulated, current-limited, adjustable output voltage (with a specified range), to one or more loop transmitters. Unlike the Hagan units, all necessary adjustments and measurements can be made from the face plate.
View full product sheet (PDF, 139kB)
The MAG1100 Magnetic Amplifier Relay replaces the obsolete Hagan magnetic amplifier relay, as a
one-channel device that compares an input signal with an internally generated and adjustable set point (BIAS) voltage. Based on this comparison, the MAG1100 actuates three Form C dry contacts. The difference between trip and reset points (DESENSE) is also adjustable. The MAG1100 is intended only for non-safety-related applications in nuclear power plants.
View full product sheet (PDF, 131kB)
The MSS801 Median Signal Selector replaces the obsolete Hagan 7100 median signal selector modules, and is used to select the median signal from two or three inputs as determined by user-configurable jumpers on the main PC board. User-defined gain and bias, and filtering and high/low limiting can be applied to the selected signal. These adjustments can be made through a mode panel in the side cover.
The only difference between the MSS801 and the NUSI 800 Series HLS801 High/Low Signal Selector (other than jumper settings on the main PC board), is the rear connector output pin configuration. The MSS801 uses pins P+ and K-; the HLS801 uses pins M+ and N-.
View full product sheet (PDF, 175kB)
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