Siemens - (6es7221-1bf22-0xa0 Em 221, 8di, DC 24v, Sink/source Digital Input Module)

Input current
from backplane bus 5 v dc, max. 30 ma
power losses
power loss, typ. 2 w
digital inputs
numberbinary inputs 8
mp-reading yes
input voltage
type of input voltage dc
rated value, dc 24 v
for signal "0" 0 to 5 v
for signal "1" 15 to 30 v
input current
for signal "1", typ. 4 ma
input delay (for rated value of input voltage)
for standard inputs
at "0" to "1", max. 4.5 ms
cable length
cable length, shielded, max. 500 m
cable length unshielded, max. 300 m
encoder
connectable encoders
2-wire sensor yes
permissible quiescent current (2-wire sensor), max. 1 ma
galvanic isolation
galvanic isolation digital inputs
galvanic isolation digital inputs yes; optocoupler
between the channels, in groups of 4
connection method
plug-in io terminals yes
dimensions
width 46 mm
height 80 mm
depth 62 mm
weight
weight, approx. 150 g