High-Speed Operation, 120 µs Scan Time 
The M1151 PAK-PLS can operate up to 1,800 rpm. The 8­channel unit maintains a repeat accuracy of 120 µs while the 16-channel unit has 200 µs scan time.

Multiple Program Storage Reduces Down­Time at Job Changeovers 
The M1151 PAK-PLS can internally store four or eight independent programs for different jobs. With a preprogrammed M1151 for different product runs, the product changeover is as simple as pressing the MODE and Inc/Dec keys to select the program corresponding to the job. Remote selection of PLS programs may be accomplished by a PLC or an external selector switch.

Built-in Tachometer and Motion Detector
The built-in tachometer displays the shaft speed in rpm simultaneously with the position display. Additionally, the built-in motion detector continuously monitors shaft speed and allows the programming of HIGH and LOW rpm limits for the motion output. The motion detector status is indicated on the front-panel by an indicator LED.

Optically Isolated Inputs and Outputs
Optically isolated inputs and outputs are standard to provide enhanced noise immunity and ensure operational integrity of the M1151 PAK-PLS in harsh industrial environments.

Internal Diagnostics 
The M1151 PAK-PLS has built in circuitry, which continually monitors the operation of the unit. If any of the six resolver wires break or short together, the Broken Wire Detect circuitry will cause a fault condition. A fail-safe fault output is provided which is energized ONLY if the resolver cable is intact, the customer power supply is present, the line voltage is within specifications, and the processor is not in reset. The fault output will de-energize if the M1151 detects any of these faults.

Dynamic Zeroing ModZ 
The M1151 PAK-PLS features optional dynamic zeroing or ModZ (MODification Zero) to modify the zero reference point for selected channels independent of actual resolver position. Upon receiving an external signal, the resolver position for the selected ModZ channels is reset to zero. Thereafter, the position is incremented as the resolver rotates and outputs are turned ON or OFF at the programmed limit settings. The ModZ feature is ideal for gluing applications, where the glue gun must be activated at certain positions after detection of an upcoming product. Four ModZ channels, any of which can be used as a normal channel, are included in the M1151 ModZ option.

Brake Monitor The optional M1151 Brake Monitor automatically measures the time in ms from an input brake signal until the resolver shaft stops rotating. This stopping time is then compared to the programmed Warning Time and Danger Time and the appropriate Safe, Caution, or Danger output is energized as a result. The M1151 Brake Monitor is normally applied as an indication control on metal stamping presses. The brake wear monitor uses three PLS channels.

Shift Register
With the Shift Register option, the four shift register channels can be thought of as programmable position delays. The Shift Register length (Turns Delay) can be programmed from 1.00 to 50.00 revolutions of the input shaft. There are two shift register modes. The Mode 1 Shift Register emulates a normal electronic shift register circuit with a programmable length. To program a shift register channel for Mode 1 operation, program a single dwell whose From setpoint is greater than the To setpoint. The Mode 1 dwell never actually executes; it is a signal for Mode 1 operation. In Mode 1, the input pattern appears at the output after the input shaft has rotated the programmed Turns Delay revolutions.

Front Panel Selectable Analog Output: Position or Tachometer 
With the analog option, analog options are front panel selectable, retrieving the user from ordering specific analog output format or setting DIP switches. Moreover, if the application requirements change, they can be easily accommodated by keying in the appropriate information.

1. 0 to 10V
2. -10 to +10V
3. 0 to 5V
4. -5 to +5V
5. -2.5 to 2.5V
6. 4 to 20 mA sourcing
7. 4 to 20 mA sinking