SMAR DFI302, User Manual, Page: 103 / 218

DFI302 - Adding I/O Modules
10.11
DF15 - DC Input Module
DF15 (2 groups of 8 24 Vdc inputs - sink - isolated)
Description
The Module detects the DC input Voltage and converts it to a True (ON) or False (OFF) logic signal.
It has 2 optically isolated groups of 8 inputs.
Technical Specifications
ARCHITECTURE
Number of Inputs 16
Number of Groups 2
Number of Points per Group 8
ISOLATION
Groups are individually isolated
Optical Isolation up to 5000 Vac
EXTERNAL POWER
Voltage Source 20 – 30 Vdc
Typical Consumption per group 65 mA
Power Supply Indicator Green LED
INTERNAL POWER
Provided by the IMB bus 5 Vdc @ 80 mA Maximum
Total Maximum Dissipation 0.4 W
Power Supply Indicator None
INPUTS
ON State Level (True Logic)
0 – 5 Vdc < 200
Ω
OFF State Level (False Logic)
20 – 30 Vdc > 10 K
Ω
Typical Impedance
3K9
Ω
Status display Yellow LED
Input current per Point 7.5 mA (typical)
Time interval from “0” to “1”
30
µ
s
Time interval from “1” to “0”
50
µ
s