Output Specifications - Renishaw RGH22 Installation Manual

Output specifications

Digital output signals - type RGH22D, X, Z, Y, H, P, Q, R and S
Form - Square wave differential line driver to EIA RS422A (except limit switches P, Q and external set-up signal X)
†
Incremental
2 channels A and B in quadrature (90° phase shifted)
Signal period P
Resolution S
A
B
Reference †
Synchronised pulse Z, duration as resolution S.
Repeatability of position (uni-directional) maintained within
±10 °C from installation temperature and for speed <250 mm/s.
For RGH22Y, S, H only Z pulse re-synchronised at power-up
with any one of the quadrature states (00, 01, 11, 10).
Actuation device A-9531-0250 or A-9531-0287
Z
Limit
open collector output
Single limit D, X, Z, Y
Length of actuating magnet
Q
Repeatability
<0.1 mm typical
Asynchronous pulse Q
Actuation device A-9531-0251, A-9531-2052 or A-9531-2054.
*
Dual limit available with flying lead, 15 pin D connector or in-line X connector only.
†
Inverse signals not shown for clarity.
RGH22 RGS20 installation guide
Model P S
(µm) (µm)
RGH22D and P
20 5
RGH22X and Q 4 1
RGH22Z and R 2 0.5
RGH22Y and S
0.4 0.1
RGH22H 0.2 0.05
*
Dual limit P, Q, R, S, H
Repeatability
<0.1 mm typical
P Q
Length of actuating magnet
Asynchronous pulse P, Q
External set-up
5 (nom)
voltage at X
0
0 50% signal level
Alarm
RGH22D, P, X, Q, Z and R
Alarm output asserted when <15% signal
Option Alarm type
00A Differential line driven output (RGH22D, X and Z only)
00A Single ended line driven output (RGH22P, Q and R only)
20A 3-state output
RGH22Y, S and H
Options 61, 62 and 63
Single ended line driven output alarm asserted when >150% signal or overspeed (RGH22S and H only).
Differential line driver output alarm asserted when >150% signal or overspeed (RGH22Y only).
3-state output alarm asserted when <15% signal.
†
Line driven alarm output
20 ms minimum
E
E- only on dual limit readheads (RGH22P, Q, R, S and H only)
3-state output
Differentially transmitted signals forced open circuit for >20 ms when alarm conditions valid.
Between 50% and 70% signal level, X is a
duty cycle, 20 µm duration.
Time spent at 5 V increases with signal level.
At >70% signal level X is nominal 5 V.
70% 100%
10