Interfaces & connections
Mounting and Installation, Technical Description, T 811 065 en
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3.6.6
BX-I2 input module connection
The BX-I2 input module has one input for polling a potential-free contact. This input can be planned as element type “input” or
“detection zone” and in the “monitored” or “unmonitored” mode.
The module also has an opto-isolator input for monitoring a potential-bound signal or an external power supply. Each input
can also be programmed inverted.
More information about the BX-I2 can be found in the data sheet T 811 069.
Input monitored or unmonitored
GN D
SH LD
SH LD
GN D
L 1
L2
X2
IN2+
IN3+
Inp ut 3
IN 2-
IN 3-
IN1+
IN 1-
1
1
X1
In put 1
Vext+
L
1
L
2
G
N
D
G
N
D
S
H
L
D
S
H
L
D
BX-I2
180
Ω
1
8
0
Ω
Scan
ex ternal voltages
Sca n
potential-fr ee contacts
monitored
unmonitor ed
Fig. 25 BX-I2, poll input and external voltage
Connection of special detectors
GND
SHLD
SHLD
GND
L1
L2
X2
IN2+
IN3+
Input 3
IN2-
IN3-
IN1+
IN1-
1
1
X1
Input 1
Vext+
L
1
L
2
G
N
D
G
N
D
S
H
L
D
S
H
L
D
BX-I2
NC
NO
180
Ω
S
p
e
c
ia
l
d
e
te
c
to
r
F
a
u
lt
A
la
rm
Power supply
unit
+
_
+
_
Battery
Battery
+
+
180
Ω
max. 30m
Fig. 26 BX-I2, connection of special detectors
