PEPS® II Controller: approximately 3.0 lb (1.2 kg)

For indoor use only, up to an elevation of 2,000 m (6560 ft.)
Maximum allowable temperature range: 5° C to 35° C
Maximum allowable humidity: 80% up to 31° C, decreasing linearly to 50% relative humidity at 40° C
Tolerance in main supply voltage: 85 VAC - 240 VAC
Over voltage category: 2
Pollution degree (IEC 664): 2
Ventilation requirements: 25 mm clearance on sides, 0 mm top and bottom

Power input voltage range: 90-230 VAC
Input frequency range: 50-60 Hz

Power switch
4 menu buttons 
LCD display 20 x 2 characters 
2 diagnostic sockets (BNC-type) 
Three-color status LED 
USB port

AC power entry with EMI filter
1 air INPUT snap-in port for 1/4" O.D. tubing 
1 air OUTPUT (Exhaust) snap-in port for 1/4" O.D. tubing 
4 air snap-in ports for 1/4" O.D. tubing (one per isolator) 
DB-25 male inputs-outputs and feedforward socket
1 Phoenix 0.2" pitch 6 pins GREEN header (vertical proximity sensors) 
1 Phoenix 3.5 mm pitch 6 pins BLACK header(horizontal proximity sensors) 
Grounding threaded stud (#10-32 thread) 
DB-25 F socket: 1x digital Input, 3x geophone sensorsinterface (“-VX” option) 
DB-25 F socket: 1x digital input, 3x current output proximity sensors (optional)

Analog inputs (unipolar): 8 x 12 bit (16 bit using over sampling), 0…3.0 V full scale
Analog inputs (feedforward): 5 x 12 bit 
(16 bit using over sampling), ±9 V full scale
Analog inputs (unipolar) protection: +5 Volts, -0.5 V clipping
Analog input (feedforward) protection: ±15 Volts clipping
Analog outputs: 4 x 12 bit (16 bit with over sampling), 0…3.0 V full scale
Analog outputs (OPTIONAL): 8 x 16 bit, 0…3.0 V full scale
Analog output protection: indefinite short circuit protection, +5 Volts clipping
Digital input voltage rating: 0…+3.3 V, +5 V tolerant (+5 Volts clipping)
Digital output rating: 0…+3.3 V, 20 mA max.
Digital I/O protection: +5 Volts, -0.5 Volts clipping
External available power: +5 VDC, 2.0 A max; +15 VDC, 1.0 A max. (20 Watt max)
Communication port: USB, appears as RS-232 on PC
Processor: ARM7TDMI / 41.78 MHz
Control loop rate: 100 Hz - 2.0 KHz
Proximity sensors: 3x vertical, (3x horizontal optional) Eddy current, NAMUR 0-20 mA output
Velocity sensors - geophones (“-VX” option): 3x vertical, current output

Long-term height stability: ±50 microns
Long-term tilt stability: ±50 micro radians
Servo valves: 4 x 2-way variable-orifice proportional servo valves
Valving technique: pure class-A 
Maximum input pressure: 120 PSI or 8.3 Bar or 830 KPa
Nominal air consumption: 60 slpm (2 scfm)
Air requirements: clean, dry air, filtered to 20 microns or better
Fail safe: isolators deflate on power failure or power off
Pneumatic fittings: 'one touch' quick fittings for 1/4" O.D. hose