Electrical Connections; Output Specifications - Renishaw QUANTiC RTLC40-S Installation Manual

Electrical connections

Grounding and shielding
QUANTiC readhead
termination/connector
Shield
IMPORTANT: The shield should be connected to the machine earth (Field Ground).
For JST variants the ferrule should be connected to the machine earth.
Maximum readhead cable length: 3 m
Maximum extension cable length: Dependant on cable type, readhead cable length and clock speed.
Contact your local subsidiary for more information.
Recommended signal termination
0 V
Readhead
A B Z+
120R
Cable Z 0 = 120R
A B Z−
0 V
Standard RS422A line receiver circuitry.
Capacitors recommended for improved noise immunity.
Single ended alarm signal termination
(Alarm signal not available with 'A' cable termination)
5 V
Readhead Customer
4k7
electronics
1k8
100R
E−
100nF
4k7
QUANTiC linear installation guide
Customer
electronics
Readhead
Customer Remote CAL operation
220 pF
electronics
CAL
0 V
Remote operation of the CAL/AGC
is possible via CAL signal.
220 pF
Limit output
(Limit output not available with 'A' cable termination)
5 V to 24 V
P Q
*
Select R so that maximum current
does not exceed 10 mA.
Alternatively, use a suitable relay
or opto-isolator.

Output specifications

Digital output signals
Form – Square wave differential line driver to EIA RS422A (except limits P and Q)
Incremental
5 V
Output
signals
0 V
A
B
Reference
Z
Limits Open collector output, asynchronous pulse
(Limit output not available with 'A' cable termination)
P Q
*
R
Alarm
Line driven
(Not available with 'A' cable termination)
E−
or 3-state alarm
Differentially transmitted signals forced open circuit
for >15 ms when alarm conditions valid.
†
Inverse signals not shown for clarity
†
2 channels A and B in quadrature (90° phase shifted)
Signal period P
Resolution S
†
Synchronised pulse Z, duration as resolution.
Bi-directionally repeatable.
Active high
Repeatability
<0.1 mm
~
Length of limit actuator
(Asynchronous pulse)
Alarm asserted when:
– Signal amplitude <20% or >135%
– Readhead speed too high for reliable operation
>15 ms
Resolution
P ( µm) S ( µm)
option code
T 40 10
D 20 5
X 4 1
Z 2 0.5
W 0.8 0.2
Y 0.4 0.1
H 0.2 0.05
NOTE: A wide reference mark option, outputting
a reference pulse for the duration of the signal
period is available.
Contact your local subsidiary for more information.
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