HEDS-8906 Avago Technologies US Inc., HEDS-8906 Datasheet - Page 7

• Manufacturer Part Number: HEDS-8906
• Description: TOOL ALIGNMENT 3CH 56MM CW
• Manufacturer: Avago Technologies US Inc.

Specifications of HEDS-8906

• Accessory Type: Mechanical Alignment Tool
• Product: Tools & Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: HEDS-904x Series
• For Use With: HEDS-9041#B00 - ENCODER MODULE 3CH 1000CPRHEDS-9041-J00 - ENCODER MODULE 3CH 1024CPRHEDS-9040#J00 - ENCODER MODULE 3CH 1024CPR516-2028 - ENCODER MOD OPT INCREMENTAL 3CHHEDS-9040#T00 - ENCODER OPTICAL GAP 3CH 2000CPR
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Electrical Interface
To insure reliable encoding performance, the HEDS-9040
and 9140 three channel encoder modules require 2.7
kΩ (±10%) pull-up resistors on output pins 2, 3, and 5
(Channels I, A and B) as shown in Figure 1. These pull-up
resistors should be located as close to the encoder mod-
ule as possible (within 4 feet). Each of the three encoder
module outputs can drive a single TTL load in this con-
fi guration.
Figure 2. HEDS-9X40 Mounting Tolerance.
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Figure 1. Pull-up Resistors on HEDS-9X40 Encoder Module Outputs.
Mounting Considerations
Figure 2 shows a mounting tolerance requirement for
proper operation of the HEDS-9040 and HEDS-9140. The
Aligning Recess Centers must be located within a toler-
ance circle of 0.005 in. radius from the nominal locations.
This tolerance must be maintained whether the module
is mounted with side A as the mounting plane using
aligning pins (see Figure 5), or mounted with Side B as
the mounting plane using an alignment tool (see Figures
3 and 4).