HEIDENHAIN Length Gauges - Manual (Page 31)

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Mechanical data ST 1278 « TTL
ST 1288 » 1 V
PP
ST 3078 « TTL
ST 3088 » 1 V
PP
ST 1277 « TTL
ST 1287 » 1 V
PP
ST 3077 « TTL
ST 3087 » 1 V
PP
Plunger actuation
Position of plunger at rest By measured object
Extended
Pneumatic
Retracted
Measuring standard DIADUR grating on glass; grating period 20 µm
System accuracy ± 1 µm
Position error per signal period  ± 0.2 µm
Short-range accuracy typically 0.3 µm
Reference mark ≈ 5 mm below upper stop
Measuring range 12 mm 30 mm 12 mm 30 mm
Working pressure – 0.7 bar to 2.5 bars 0.8 bar to 2.5 bars
Radial force  0.8 N (mechanically permissible)
Fastening Clamping shank ¬ 8h6
Operating attitude Any
Vibration 55 Hz to 2 000 Hz
Shock 11 ms
 100 m/s
2
(EN 60 068-2-6)
 1 000 m/s
2
(EN 60 068-2-27)
Operating temperature 10 °C to 40 °C; reference temperature 20 °C
Protection EN 60 529 IP67/IP64 IP 64
Weight without cable 40 g 50 g 40 g 50 g
Electrical data ST 127x
ST 307x ST 128x
ST 308x
Interface « TTL » 1 V
PP
Integrated interpolation* 5-fold 10-fold –
Signal period 4 µm 2 µm 20 µm
Edge separation a at
scanning frequency*/traverse speed
2)
100 kHz  72 m/min
1)
50 kHz  60 m/min
25 kHz  30 m/min
 0.48 µs
 0.98 µs
 1.98 µs
 0.23 µs
 0.48 µs
 0.98 µs
–
Electrical connection* Cable 1.5 m with D-sub connector (male),
15-pin (integrated interface electronics)
Cable 1.5 m with
• D-sub connector (male), 15-pin
• M23 connector (male), 12-pin
Cable outlet* Axial or radial
Cable length  30 m with HEIDENHAIN cable
Voltage supply 5 V DC ± 0.5 V
Current requirement < 195 mA (without load) < 55 mA
* Please select when ordering
1)
Mechanically limited
2)
At the corresponding cutoff or scanning frequency