SI-Safety Installation & Operating Manual
39
Issue Number: 1
S
Devi
Te
safety
Inst
SI-Safety module
S
M
Te
SI-Safety
En
Va
Enc
oder
Am
endment
Index
•
For the data and clock signals, and/or track A and track B, twisted pair wiring must
be used for signal transmission to comply with RS485 standards. When selecting a
suitable cross sectional cable area, consideration should be given to the power
consumption of the encoder, and to the length of cable used for each individual
installation.
•
With regard to the use of absolute encoders, the following points also apply:
In Slave mode, the clocking signal is generated by an external process, and is scanned
together with the data signal from the SI-Safety module. This kind of scanning causes a
degree of 'floating action' which in turn gives rise to a scanning error of the following
magnitude:
F = ( sensing time of sensor from external system [ms] / 8 [ms] ) * 100 %
The level of the resultant scanning error
F
must be taken into account when defining the
thresholds in the monitoring functions employed as this error cannot be compensated
for.
Table 4-3 Encoder interface HDMI
Pin
Designation
Encoder
Function
1
A+(COS+)/DATA+
ENC1
Incremental track A+ / data wire DATA+
2
SHIELD
3
A-(COS-)/DATA-
ENC1
Incremental track A- / data wire DATA-
4
B+(SIN+)/CLK+
ENC1
Incremental track B+ / data wire CLOCK+
5
SHIELD
6
B-(SIN-)/CLK
ENC1
Incremental track B- / data wire CLOCK-
7
A+(COS+)/DATA+
ENC2
Incremental track A+ / data wire DATA+
8
SHIELD
9
A-(COS-)/DATA-
ENC2
Incremental track A- / data wire DATA-
10
B+(SIN+)/CLK-
ENC2
Incremental track B+ / data wire CLOCK+
11
SHIELD
12
B-(SIN)/CLK-
Incremental track B- / data wire CLOCK-
13
L+
ENC1
Power supply for SUPPLY sensor interface
14
L+
ENC1
Power supply for SUPPLY sensor interface
15
L-
ENC1/2
Power supply for GND sensor interface
16
L-
ENC1/2
Power supply for GND sensor interface
17
L+
ENC2
Power supply for SUPPLY sensor interface
18
L+
ENC2
Power supply for SUPPLY sensor interface
19
NC
Summary of Contents for unidrive m
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