Electro-Optical Absolute Encoders with PROFIBUS-DP-Interface - KBD 58 and KRD 58 series - Issue 01 / 2005

Q: What measurement ranges and resolutions are supported by the KBD 58 and KRD 58 series?

KBD 58 provides singleturn absolute measurement with a 360° range. KRD 58 supports multiturn absolute measurement up to 4096 revolutions, with total position capacity stated as 228 (28 bits) and resolutions from 12 to 16 bits.

Q: How does the encoder connect to a PROFIBUS-DP bus and what protocol class is supported?

The encoders are designed to connect directly as PROFIBUS-DP slave stations, implemented with a SPC3 Siemens PROFIBUS controller. The protocol follows DP-slave class 2 functionality as described for encoders in the referenced Profibus profile.

Q: What differences exist between variant L and variant Z regarding addressing and bus termination?

Variant L uses a round connector, and the default station address is changed via the DDLM_Set_Slave_Add service, with bus-termination resistors installed externally. Variant Z uses a connecting cap with DIP switches to set station address and termination resistances, and it also provides integrated addressing via T-coupler functionality.

Sep 10, 2026

Upload by Chloe Bennett

Electro-Optical Absolute Encoders with PROFIBUS-DP interface from the KBD 58 and KRD 58 series provide singleturn (360°) and multiturn (4096 revolutions) absolute position measurement with 12 to 16 bit resolutions. The device supports PROFIBUS-DP slave station operation via an SPC3 Siemens controller, with selectable configuration for Class 1/2 diagnostics and optional functions. Two physical variants are offered (L with round connector, Z with connecting cap) including addressing, termination handling, LED diagnostics, and preset control. Electrical and mechanical specifications cover RS-485 line driving, supply voltage range, power consumption, max speed, and EMC standards.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages4

Reading Time10 min

AccessFree to download

Electro-Optical Absolute Encoders with PROFIBUS-DP-Interface

Series overview and key features

Variants and connection methods (L and Z)

Construction and system stabilization

General connection features and PROFIBUS protocol

Electrical data and interface

Mechanical data

Bus data, diagnostics, and configuration

Diagnosis LED indicators and operating modes

| | Electro-Optical Absolute Encoders
with PROFIBUS-DP-Interface
KBD 58 and KRD 58 series | KRD 10941 FE | | --- | --- | --- | | | | 01 / 2005 | ! Series KBD 58: Singleturn Measuring range 360° ! Series KRD 58: Multiturn Measuring range 4096 revolutions ! Resolutions: 12 to 16 Bits / 360°<)(4096 to 65.536 positions / 360°<) ) ! Total capacity: 228 (28 Bits) ! Transmission rate: 12 MBaud max. ! Option: Preset function ! Model 58-S with synchro flange Model 58-K with clamping flange ! Variant "L" with round connector Variant "Z" with connecting cap ! Protection grades: IP 65 or IP 66 | | |
Model 58 Variant " | -S
Z" | | --- | --- | --- | --- | Construction Flange and housing of aluminium - shaft of stainless steel- 12 mm ball-bearings with Nilos ring seal or radial packing ring seal-code disk of deformation resistant plastic-GaAlAs diodes - photo-transistor array with comparator and trigger circuits for long-term stabilization of the sensor systems gate array-SMD technology. General features and modes of connection The CRD encoders are designed for connecting directly to PROFIBUS-DP buses as slave stations. The interface is realized with the SPC3 Siemens PROFIBUS controller. The protocol is executed in accordance with DP-slave class 2 functionality as laid down in Profibus-Profile for Encoders, No. 3.062 and is described in detail in the user manual KRD 11109. Compared to the CRD series KBD and KRD items provide additional optional functions, i.e. a 32-Bits velocity signal and short dignostic functionality. (For detailes [ref. to](ref. to) table page 4) . Block diagram Mult i-functional ASIC µControl ler-System PROFIBUS Controller Variant L with RS 25 round connector: " The encoder is connected tothebuswitha cable (connector arrangement in accordance with profile description for encoders) . " The default address is changed via the service for changing the station address of a DP slave, namely DDLM_Set_Slave_Add. The bus-termination resistors have to be installed externally. " For stub connection refer to PROFIBUS-DP / FMS instruction (PNO-order no. 2. 111) Variant Z with connecting cap (T-coupler functionality with integrated addressing) This variant is designed for the following connection cablesand provides the following functions: " DIP- switches to set the station address and the termination resistances " Diagnosis LED's showing ON, SRD, Class and Error " Preset touch button " 1 cable for the supply voltage (+ VS = 24 VDC, -VS = 0 VDC), PG 7 cable gland " 1 cable for Bus In ( A, B ), PG 9 cable gland " 1 cable for Bus Out (A', B'), PG 9 cable gland " The station address and bus-termination resistors are set with DIP switches in the connecting cap. TWK-ELEKTRONIK GmbH · PB. 10 50 63 · D-40041 Düsseldorf · Tel.: +49/211/63 20 67 · Fax: +49/211/63 77 05 · [info@twk.de](info@twk.de) · [www.twk.de](www.twk.de) Electro-Optical Absolute Encoders KBD / KRD 58-S/K Electrical data ! Sensor system: GaAlAs diodes, photo-transistor array ! Resolution: 65536 positions / 360° max. ! Measuring range: 4096 revolutions ! Total number of KBD: 216 (16 Bits) positions: KRD: 228 (16 + 12 Bits) ! Output code: Natural binary ! Max. position variance: ≤ 2' 38" at 4096 positions/360° ≤ ±1'59 at 8192 positions/360° ! Code sense: CW or CCW; (programmable) ! Supply voltage range: + 13,5 VDC to + 30 VDC ! Power consumption: PD ≤ 3,5 W (Inrush current ≤ 300 mA) ! Interface: Line driver in acc. with RS 485; galvanic separation is achieved with an opto-coupler (data lines A, B) . Supply voltage galvanic separation is achieved with DC/ DC-converter ! Electromagnetic compatibility (EMC): EN 50081-2, EN 50082-2 Mechanical data ! Operating speed: 6000 rpm max. ! Angular acceleration: 105 rad/s² max. ! Moment of inertia (rotor): 45 gcm² ! Operating torque: ≤ 5 Ncm (8 Ncm-KBD-K, KRD-K)(at 1000 rpm) ! Starting torque: ≤ 1 Ncm (4 Ncm-KBD

FAQs

What measurement ranges and resolutions are supported by the KBD 58 and KRD 58 series?

KBD 58 provides singleturn absolute measurement with a 360° range. KRD 58 supports multiturn absolute measurement up to 4096 revolutions, with total position capacity stated as 228 (28 bits) and resolutions from 12 to 16 bits.

How does the encoder connect to a PROFIBUS-DP bus and what protocol class is supported?

The encoders are designed to connect directly as PROFIBUS-DP slave stations, implemented with a SPC3 Siemens PROFIBUS controller. The protocol follows DP-slave class 2 functionality as described for encoders in the referenced Profibus profile.

What differences exist between variant L and variant Z regarding addressing and bus termination?

Variant L uses a round connector, and the default station address is changed via the DDLM_Set_Slave_Add service, with bus-termination resistors installed externally. Variant Z uses a connecting cap with DIP switches to set station address and termination resistances, and it also provides integrated addressing via T-coupler functionality.

Sep 10, 2026

Upload by Chloe Bennett