Absolute hollow shaft encoders
BFF/BFG
SSI
features
• synchronized serial interface SSI
• 12 Bit resolution
BFF
BFG
general data
voltage supply
max. supply current
no load
steps/rev
max. measuring step
pulse tolerance
switching frequency
fmax.
input signal
10 - 30 VDC (24C)
typ. 50 mA (at 24 VDC) (24C)
see order designation
13 Bit (1 step = 2' 38'')
±
1/2 step
1 MHz
clock input, F/R-input
mechanical data
max. revolutions
rotor inertia
torque
12,000 /min
BFF typ. 18.4 x 10
-7
kgm
2
BFG typ. 23.8 x 10
-7
kgm
2
BFF typ. 0.93 cNm
BFG typ. 3.7 cNm
(3000 rev/min 20
°C)
dependent on ambient conditions
(typ. 10
9
revolutions))
IP 65
housing: aluminum
BFF with connection ref. -5: steel
flange: aluminum
approx. 300 g
product life
max. protection class
material
weight
ambient conditions
temperature range
relative humidity
vibration
shock
noise immunity
emitted interference
0 to +65
°C
max. 95%
non condensing
IEC 60068-2-6
(≤ 100 m/s
2
/ 10-200 Hz)
IEC 60088-2-27
(≤ 500 m/s
2
/ 11 ms)
EN 61000-6- 2
EN 61000-6- 3
BFF
BFG
SSI
housing and connection dimensions
BFF
-5
ø12.7 H7 (1/2") x 15
*R=22
±1.5
/ ø 4 mm
M4 x 6
3 x 120°
BFG
-5
ø24
*R=22
±1.5
/ ø 4mm
M4 x 6
3 x 120°
60
4.5
°
60
°
*
ø12.7 H7 (1/2") x 49
9
*
13
1
2.2
2
1
32
6
°
7.5
42
0
50
-0.025
58h10
1
2.2
2
1
39
7.5
13
42
0
50
-0.025
58h10
-E7
with clamping ring
ø12.7 H7 (1/2") x 15
ø24
6
14
14
26
ø18
ø18
73
2.2
2
1
1
39
14
73
Absolute hollow shaft encoders
BFF/BFG
SSI
output circuits
SSI-output
encoder
circuit
schematic
+Vs
24C clock input
typical
user
interface
+Vs
DC
DC
encoder
circuit
schematic
+Vs
typical
user
interface
+Vs
6N137
Data
e.g. MC 3487 D
SN 75153
100
Ω
91
Ω
Clock
91
Ω
100
Ω
1 nF
100
Ω
1 nF
0V
0V
e.g. MC 3489
SN 75175
AM 26 LS 32A
0V
0V
forward/reverse signal input
+V
S
12k
Ω
1.2k
Ω
0V
F/R*
output option
function of the SSI
In the stand-by mode, both clock and data signals are HIGH.
The actual measuring value is stored during the first falling
edge. The data transmission takes place with the first rising
edge, starting with MSB. It needs n+1 rising edges to transmit
the data word completely. After the last positive edge has
passed, the data output stays in a LOW condition, until the
angle measuring device is ready for a new transmission cycle.
n clock
t1
clock
T
t3
data
t2
Bit n Bit n-1
Bit 3
Bit 2
Bit 1
pulse times:
T = 1
µs
to 10
µs
/ t1 = 0.5 to 5
µs
t2 < 0.2
µs
/ t3 > 12
µs
to 25
µs
2. 22
www.baumerelectric.com
BFF
BFG
SSI
order designation BFF
BFF 0G.24C
connection
5
A
cable 2 m radial
connector radial
5
A
order designation BFG
BFG 0G.24C
connection
cable 2 m radial
connector radial
shaft
12
end shaft 12 mm IP 42
A7
end shaft 12.7 mm (1/2") IP 42
B2
end shaft 12 mm IP 42
with clamping ring
E2
end shaft 12 mm IP 64
with clamping ring
E7
end shaft 12.7 mm (1/2") IP 64
with clamping ring
L2
end shaft 12 mm IP 64
L7
end shaft 12.7 mm (1/2") IP 64
standard pulse range
4096
3600
12 Bit
12 Bit (symmetrically clipped)
4096
3600
shaft
B2
through shaft 12 mm IP 42
with clamping ring
B7
through shaft 12.7 mm (1/2")
E2
through shaft 12 mm IP 64 with
clamping ring
E7
through shaft 12.7 mm (1/2") IP 64
with clamping rin
g
standard pulse range
12 Bit
12 Bit (symmetrically clipped)
encoder type
encoder type
F
end shaft encoder
G
through shaft encoder
pin assignment
for connection reference
-A
and
-5
24C
(10 - 30 VDC)
1
9
8
accessories
connector 12-pin
signals
clock -
clock +
data +
data -
n.c.
n.c.
n.c.
F/R
n.c.
housing
+Vs
0V
1)
part nr. 116717
pin number
1
2
3
4
5
6
7
8
9
10
11
12
cable color
yellow
green
grey
pink
red
-
-
blue
-
screen
brown
white
2
7
10 12
6
3
4 11 5
cable with connector (pre-assembled)
2m
part nr. 130372
5m
part nr. 130373
clamp set
torque pin
torque spring
1)
part nr. 110616
part nr. 107540
part nr. 109520
torque spring included
www.baumerelectric.com
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