L-9517-9563-06-A_Data_sheet_ATOM_en.pdf - 第24页

24 A TOM miniature encoder system Electrical connections Gr ounding and shielding Cable readhead Shield Connector / interface Customer electronics IMPORT ANT: The shield should be connected to the machine ear th (Field G…

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23 ATOM miniature encoder system
General specications
Power supply
1
5V ±10% ATOM readhead typically < 50 mA
ATOM with ACi typically < 100 mA
ATOM with Ri typically < 100 mA
ATOM with Ti typically < 200 mA
For analogue outputs a further 10mA in total will be drawn when terminated
with 120R.
For digital outputs a further 25mA per channel pair (eg A+, A−) will be drawn
when terminated with 120R.
Power from a 5Vdc supply complying with the requirements for SELV of
standard IEC60950-1.
Ripple 200mVpp maximum@frequency up to 500kHz
Temperature Storage −20°C to +70°C
Operating 0°C to +70°C
Humidity 95% relative humidity (non-condensing) to IEC60068-2-78
Sealing Cable variant IP40
FPC variant IP20 (with lid tted)
Ri interface IP20
Ti interface IP20
Acceleration (system) Operating 400m/s², 3axes
Shock (system) Operating 1000m/s², 6ms, ½sine, 3axes
Vibration Operating 100m/s² max @ 55Hz to 2000Hz, 3axes
Mass Cable readhead 4g
FPC readhead 2.3g
Cable 18g/m
Ti interface 100g
Ri interface 70g
ACi interface 4g
Readhead cable 10 core, high ex, EMI screened cable, outside diameter 3.5mm maximum
Flex life >20 × 10
6
cycles at 20mm bend radius, maximum length 5m.
(Extension cable up to 25m when using Renishaw approved extension cable)
UL recognised component
FPC cable 16 core, 0.5mm pitch, maximum exposed conductor length 2.5mm,
maximumlength 1m
Connector options Cable variants Interboard connector compatible with the Ri, Ti and ACi (cable variant)
interfaces
15-way, D-type connector
FPC 16 core, 0.5mm pitch, compatible with ACi (FPC variant)
Typical SDE (analogue) 20µm version <±75nm
40µm version <±120nm
1
Current consumption gures refer to unterminated systems.
24 ATOM miniature encoder system
Electrical connections
Grounding and shielding
Cable readhead
Shield
Connector / interface
Customer electronics
IMPORTANT: The shield should be connected to the machine earth (Field Ground).
NOTE: Maximum cable length between interface and customer electronics is 25m for ACi and Ri and 50m for Ti depending on
clocked output.
FPC readhead
FPC cable
Shield
(recommended)
Output signals
5 V
0 V
ACi / customer electronics
For more information on FPC refer to the installation guide.
Output signals
5 V
0 V
25 ATOM miniature encoder system
Analogue outputs
V
0
V
1
V
2
−
V
0
V
1
V
2
+
120R
Remote CAL operation
CAL
0 V
Remote operation of the CAL is possible via the CAL pin. For applications where no interface is used,
remote CAL operation is essential.
Recommended signal termination
Digital outputs
Interface
A B Z E+
Cable Z
0
= 120R
Customer
electronics
A B Z E−
120R
Standard RS422A line receiver circuitry.
Capacitors recommended for improved noise immunity.
220 pF
0 V
0 V
220 pF