Limit Switch; Output Signals; Speed - Renishaw RGH34 Installation Manual

Limit switch

A limit switch signal is output when the readhead sensor passes the magnetic actuator.
For full output specification refer to RGH34 Data sheet (Part number L-9517-9728).
CAUTION: The limit switch feature must never be used as a fail-safe stop device.
NOTE: Check that the limit switch sensing option has been specified on the RGH34
and RGI34 that you have purchased.
A pulse is output from the readhead for the duration of the passing of the magnetic actuator.
The limit switch provides an end of travel indication, repeatable to <0.1 mm (typical).

Output signals

Pin out diagram
RGI34 digital RS422A output types T, D, G, X, N, W, Y, H and
RGI34 analogue 1Vpp output type B
FPC connector
1
10
Digital Output signal Through hole
5 V
Power
0 V 10
A+
A-
Incremental
signals
B+
B-
Reference mark (Z) Z-/Q+
or Limit switch (Q)
(if fitted) Z+/Q-
Red
External LED
driver
Green
RGH34 RGS40 installation guide
Signal
9 10
0 V
A phase
Signal
B phase
output
C phase
V mid
Hall
1 2
5 V
Analogue Output signal
5 V
9
Power
0 V
V +
8
1
V -
7
Incremental
1
signals
V +
2
2
1 V -
2
V +
Reference mark
6
0
(if fitted)
V -
0
5
4
3

Speed

Digital interfaces
Non-clocked output interfaces.
Interface type
T
(10 μm)
D
(5 μm)
G
(2 μm)
X
(1 μm)
Clocked output interfaces
The RGI34N, W, Y and H interfaces are available with a variety of different clocked outputs.
Customers must ensure they comply with the lowest recommended counter input frequency.
Clocked output code
FPC
30
connector pin
31
1, 2
32
3
33
4
5
Analogue interface
6
RGI34B – 6 m/s (-3dB)
7
8 m/s (-6dB)
8, 9, 10
Through hole
9
10
8
7
6
5
2
1
Maximum speed (m/s) Lowest recommended counter input frequency (MHz)
8
Encoder velocity (m/s)
8
Resolution (µm)
7.5
6
Maximum speed (m/s)
Interface type
N W Y
(0.4 μm) (0.2 μm) (0.1 μm)
– 1.3 0.6
– 0.9 0.45
1.3 – –
0.9 0.45 0.2
x 4 safety factor
Lowest recommended
counter input frequency
(MHz)
H
(50 nm)
0.3 12
0.2 8
– 6
0.1 4
9