Technosoft 2017
36
iPOS4808 BX-CAT-STO Technical Reference
Multi-turn frame
m+n m+n-1 m+n-2 m+n-3 m+n-4
n+4
n+3
n+2
n+1
DT+
CK+
T
T/2
1
2
3
4
5
m-3
m-2
m-1
m
MSB
LSB
m multi-turn bits
n
n-1
n-2
n-3
n-4
4
3
2
1
m+1
m+2
m+3
m+4
m+5
m+n-3 m+n-2 m+n-1
m+n
MSB
LSB
n single-turn bits
CK- and DT- signals have the same form with CK+ and DT+, but with opposite polarity.
3.6.16 BiSS Encoder Interface
Min.
Typ.
Max.
Units
Differential mode compliance (CLOCK,
DATA)
TIA/EIA-422
CLOCK Output voltage
Differential; 50Ω
differential load
2.0
2.5
5.0
V
Common-mode, referenced to GND
2.3
2.5
2.7
CLOCK frequency
Software selectable
1000, 2000, 3000, 4000
kHz
DATA Input hysteresis
Differential mode
±
0.1
±
0.2
±
0.5
V
Data input impedance
Termination resistor on-board
120
Ω
DATA Input common mode range
Referenced to GND
-7
+12
V
Absolute maximum, surge (duration
≤
1s)
†
-25
+25
Software selectable
Single-turn / Multi-turn
Counting direction
DATA resolution
Total resolution (single turn or single turn + multi turn)
31
bit
Protocol
BiSS C mode (sensor mode)
3.6.17 Analog 0…5V Inputs (REF, FDBK)
Min.
Typ.
Max.
Units
Input voltage
Operational range
0
5
V
Absolute maximum values, continuous
-12
+18
Absolute maximum, surge (duration
≤
1s)
†
±36
Input impedance
To GND
30
kΩ
Resolution
12
bits
Integral linearity
±2
bits
Offset error
±2
±10
bits
Gain error
±1%
±3%
% FS
Bandwidth (-3dB)
Software selectable
0
1
kHz
ESD protection
Human body model
±2
kV
3.6.18 RS-232
Min.
Typ.
Max.
Units
Standards compliance
TIA/EIA-232-C
Bit rate
Depending on software settings
9600
115200
Baud
Short-circuit protection
232TX short to GND
Guaranteed
ESD protection
Human body model
±2
kV
3.6.19 Supply Output (+5V)
Min.
Typ.
Max.
Units
+5V output voltage
Current sourced = 250mA
4.8
5
5.2
V
+5V output current
iPOS4808 BX-CAT-STO
200
250
Short-circuit protection
Yes
Over-voltage protection
NOT protected
ESD protection
Human body model
±2
kV
3.6.20 EtherCAT ports J5 and J6
Min.
Typ.
Max.
Units
Standards compliance
IEEE802.3, IEC61158
Transmission line specification
According to TIA/EIA-568-5-A
Cat.5e.UTP
J5, J6 pinout
EtherCAT® supports MDI/MDI-X auto-crossover
TIA/EIA-568-A or TIA/EIA-568-B
Software protocols compatibility
CoE, CiA402, IEC61800-7-301
Node addressing
By software, via EasySetup
1 ÷ 255
-
By hardware via hex sw1 and sw2
1 ÷ 127
-
1
“FS” stands for “Full Scale”