62 Rockwell Automation Publication 2198-UM005C-EN-P - February 2022
Chapter 4 Connector Data and Feature Descriptions
Generic TTL Incremental Feedback
Generic TTL feedback for load feedback, master feedback, and feedback only
axes applies to the motor feedback connector (with halls) and auxiliary
feedback connector (without halls).
Table 31 - Generic TTL Incremental Specifications
Allen-Bradley Bulletin 844D, 847H, and 847T encoders are the preferred
encoders for auxiliary feedback connections.
Table 32 - Allen-Bradley Auxiliary Feedback Encoders
Refer to the Kinetix Motion Accessories Technical Data, publication
KNX-TD004
, for more information on these Allen-Bradley encoders.
Attribute Value
TTL incremental encoder support 5V, differential A quad B
Quadrature interpolation 4 counts / square wave period
Differential input voltage
(MTR_AM, MTR_BM, and MTR_IM)
5V DC, differential line driver (DLD) output compatible
DC current draw
(MTR_AM, MTR_BM, and MTR_IM)
30 mA, max
Input signal frequency
(MTR_AM, MTR_BM, and MTR_IM)
5.0 MHz, max
Edge separation
(MTR_AM and MTR_BM)
42 ns min, between any two edges
Commutation verification
Commutation angle verification performed at the first Hall signal
transition and periodically verifies thereafter
Hall inputs
(MTR_S1, MTR_S2, and MTR_S3)
Single-ended, TTL, open collector, or none
Cat. No. Description
844D-B5CC1FW
HS35, hollow-shaft incremental encoders, rear (through-shaft),
5/8 in., tether, 3/8 in. bolt on a 2.5…4.0 in. diameter, 10-pin connector,
5V DC in, 5V DC DLD out
844D-B5CC1CS
844D-B5CC1DR
847H-DN1A-RH01024
Size 25, incremental encoder, standard square flange, 3/8 in.
diameter shaft with flat, 4.5…5.5V line driver, TTL (B-Leads-A, CW, Z
gated with BN), MS connector, 10-pin
847H-DN1A-RH02048
847H-DN1A-RH05000
847T-DN1A-RH01024 Size 20, incremental encoder, standard square flange, 3/8 in.
diameter shaft with flat, 4.5…5.5V line driver, TTL (B-Leads-A, CW, Z
gated with BN), MS connector, 10-pin
847T-DN1A-RH02048