Engineering Guide CDA3000
5-3
5  Communication and user modules
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5.2 User module With the user module UM-8I40 the digital inputs and outputs of the
inverter module are expanded by eight inputs and four outputs. The
functionality of the expanded inputs and outputs corresponds to that of
the I/Os of the inverter module.
Figure 5.2 UM 8I4O
Technical data UM-8I4O
Voltage supply 24 VDC ±20 % 
Current consumption 0.6 A
Eight inputs
Input voltage for signal “0” from 0 to 5 V
Input voltage for signal “1” >15 V
Input current with signal “1”
3.5 mA to 7.0 mA 
(6 mA at 24 VDC)
Four outputs Output current 
Permissible 
range with 
signal “1”
min. 5 mA max. 0.5 A
Mean 125 mA
Total current 0.5 A
Short-circuit cur-
rent per output
max. 1.2 A short-time
Dimensions
 (W x H x D)
28 x 90 x 90 [mm]
Table 5.1 Technical data