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HS35 Absolute Encoder

1.The rubber shaft seal is recommended in virtually all installations. The most common exceptions are applications

requiring a very low starting torque or those requiring operation at both high temperature and high speed. For these

exceptions, a felt shaft seal is recommended. Felt seals require very low starting torque and can virtually eliminate fric-

tional heat. Encoders ordered with felt shaft seals will have an enclosure rating of IP50 and will have less than 1/10th the

Starting Torque specified under Mechanical Configurations.

2. Output IC’s: Output IC’s are available as either Line Driver (LD) or NPN Open Collector (OC) types. Open

Collectors require pull-up resistors, resulting in higher output source impedance (sink impedance is similar to that of line

drivers). In general, use of a Line Driver style output is recommended. Line Drivers source or sink current and their lower

impedance mean better noise immunity and faster switching times. Warning: Do not connect any line driver outputs

directly to circuit common/OV, which may damage the driver. Unused outputs should be isolated and left floating. Our

applications specialists would be pleased to discuss your system requirements and the compatibility of your receiving

electronics with Line Driver type outputs.

volts and reverse voltage. Outputs are short circuit protected for one minute. Supply current is 120 mA typical (plus load

current). This is the recommended replacement for 3904R and 7406R open collector outputs with internal pullup resistors.

It is also a direct replacement for any 4469, 88C30, 8830 or 26LS31 line driver

13-28VdC: For Analog

28V/5: Multi-voltage Line Driver (7272*): 100 mA source/sink. Input voltage 5 to 28 VDC +/- 5% standard, internally regulated

with 5V (TTL compatible) logic out. Supply lines are protected against overvoltage to 60 volts and reverse voltage. Outputs are

short circuit protected for one minute. Supply current is 90 mA typical (plus load current). Note: Limit encoder load to 2.5W

max at ambient. Example at 12 VDC: 2.5W/(+12VDC minus +5VDC) = 357 mA total allowed current. Consult factory for your

specific requirements.

28V/OC: NPN Open Collector (3904*, 7273*). Current sink of 80 mA max. Current sourced by external pull- up resis-

Supply current is 120 mA typical. This replaces prior IC’s with designations of 3904, 7406, 3302, 681 and 689.

3. Special –S at the end of the model number is used to define a variety of non-standard features such as special shaft

lengths, voltage options, or special testing. Please consult the factory to discuss your special requirements.

* Products manufactured prior to April 2007 used the line driver IC number instead of voltage output in model number.

Notes

MS Connector Termination

R1 Tether Block and Pin

R2 Tether Arm

dimensions

MS Connector Termination