• Provides DC Output Proportional to Frequency Input
• Fully Isolated Input / Output Available
• 30 mV to 500 V Peak Input Sensitivity
• Three Threshold Ranges
• Pull-up Resistor
• Unlimited Choice of Input Ranges (Within specified range limits)
• Low-Drift Copper-Stabilized Input
• NEMA-4X Splashproof and Corrosion Resistant
• 5 Year Warranty

The TW850X provides a DC output current proportional to a frequency input signal with an optional display in a "hockey puck" case. Optional isolation is also available for the transmitter. The transmitter is protected by a gasketed, NEMA-4X glass-filled polyester housing and operates from -40°C to +85°C. The chopper-stabilized input amplifier provides accurate, low-drift operation.

All Wilkerson products are designed with RFI filters and lightning protection to reduce susceptibility to electrical noise and damage by lightning.

The output ZERO and SPAN controls are accessible through the top of the housing.

Optional conformal coating of the electronic components makes the TW850X extremely reliable and resistant to the corrosion, moisture and fungus associated with many industrial environments. A built-in pull-up resistor is provided to permit use with contact closure or open-collector inputs.

Terminations are made to screw terminal connectors on the top of the case.

TYPICAL APPLICATIONS
Remote motor, conveyor speed, data acquisition, isolation

INPUT RANGE select any range from 0 to 10 Hz min to 0 to 5 kHz max INPUT SENSITIVITY (Peak-to-Peak) any voltage from 30 mV to 500 V MAX DC OFFSET High Range ±250 VDC Low and Medium Range ±30 VDC INPUT IMPEDANCE High and Medium Range 100 kilohms Low Range 10K ohms Built-In Pull-up Resistor 10K ohms Open-Circuit Voltage 6.5 VDC OUTPUT RANGE 4/20 mA (10/50 mA optional) ISOLATION (Optional) Output / Input >500 megohms Breakdown Voltage >600 VAC rms RESPONSE TIME (Range Dependant) < 1.5 sec

MAX LOAD RESISTANCE RL max= (V supply - 12)/I out max ACCURACY ±0.1% of span LINEARITY ±0.1% of span OUPUT RIPPLE (Peak-to-Peak) 0.1% of span LINEARITY ±0.5% of span OPERATING TEMPERATURE -40°F to 185°F/-40°C to 85°C TEMPERATURE STABILITY ±0.01% of span/°C max POWER 12 to 48 VDC SUPPLY VOLTAGE EFFECT 0.01% of span max, 12 TO 48 VDC

PIN PS + PIN PS -

Power Supply + Power Supply -

FREQUENCY INPUT CONNECTIONS
Input Amplitude	Connect to Terminals	Jumper
Low: 30 mV to 5V pk-pk  10 mV to 1.7 V rms sine	3 and 4	none
Med: 300 mV to 50 V pk-pk  100 mV to 17 V rms sine	2 and 4	none
High: 3V to 500 V pk-pk  1 V to 170 V rms sine	2 and 4	3 and 4
Contact Closure or  Open Collector	2 (+) and 4 (-)	1 and 2