Technical table

name	value
Axis type	Rotary
Cable length (m)	1.5
Encoder product type	Readhead
Encoder size	Compact
Extended temperature range	false
Functional safety	false
Max speed	10 m/s at -3dB
Measurement type	Incremental
Movement type	Rotary
Output signal	Analogue
Readhead size	35 mm x 13.5 mm x 10 mm
Readhead termination	Interboard connector
Readhead type	Incremental analogue 1 Vpp
Reference marks	All reference marks are output
Scale compatibility	RESM20 / REXM20 < Ø60 mm
Scale pitch (µm)	20
Scale shape	Rotary
Series	TONiC
Sub-divisional error	<±30 nm typical
Ultra high vacuum	false

Description

T2021-15A is a standard Renishaw TONiC readhead with a 1.5 m cable length. This readhead is configured for rotary encoder systems using RESM20 rings with outer diameters < 60 mm. When combined with the detachable Ti interface Ti0000A00A, it provides ultimately reliable precision feedback and high-speed performance, with easy installation, analogue output, low Sub‑Divisional Error (SDE) and noise.

T2021-15A Key Features / Benefits:

T2021-15A is compatible with RESM20 rings (diameters < 60 mm)
T2021-15A features a reference mark output
T2021-15A features a 1.5 m cable with a termination for connection with Renishaw TONiC encoder interface
T2021-15A is compatible with analogue TONiC interface Ti0000A00A

About the TONiC series of incremental encoders

TONiC readheads are simple to install with wide set-up tolerances and calibration at the push of a button
Dynamic signal control and unique filtering optics ensures low SDE and noise, maintains signal amplitude and enables improved scanning performance and positional stability
An optional TONiC diagnostic kit is available for real‑time encoder data feedback during installation or for in-field diagnostics (contact your local Renishaw representative)
A CAD model of the TONiC readhead is available from the Renishaw website