HEIDENHAIN IK-115 - Manual (Page 6)

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Specifications of the IK 115
Specification of the PC bus
The IK 115 can be installed in all IBM AT and 100% compatible
PCs. HEIDENHAIN cannot guarantee proper function of the IK
115 in PCs that are not 100% compatible. The IK 115 complies
with the international standard IEEE P996, which specifies the
AT and ISA bus (industrial standard).
Bus width 16 bits
Power supply +5 V ± 5%
+12 V ± 5%
–12 V ± 5%
Power consumption Approx. 2 watts
without encoders
Slot version AT-compatible, short 16-bit slot
Specification of the 1 V
PP
interface
Signal amplitudes
A, B (0°, 90°)
0.6 V
PP
to 1.2 V
PP
Signal level for error
message
ˆ 0.22 V
PP
Maximum input frequency 400 kHz
Cable length to encoder Max. 150 m
Specification of the bidirectional EnDat or SSI interface
Input component Differential line receiver
(e.g. LTC 485 or SN65LBC176D)
Input signals Differential signals to RS 485
Terminating resistor 120
W
Maximum clock frequency 2000 kHz for EnDat interface
1000 kHz for SSI interface
Cable length to encoder Max. 150 m