Siemens eWON4002 - Manual (Page 19)

eWON4002™
Installation Guide
page 16 of 35
ver 2.04
Note: the 3 switch configurations shown in the table above are the only configurations giving
satisfactory results.
Warning: The switch 2 is reserved and must stay OFF. Note that the switches 3 & 4 need to have the
same position (both ON or both OFF). When they are ON, this connects the internal
polarisation (typ 680 Ohms) and termination (typ 120 Ohms) resistors. This configuration
applies only to RS4xx lines conforming to good practices.
5.5 Digital Inputs
There are 9 Digital Inputs, 8 on the DI connector on the eWON®’s top face, and 1 on the Input/Output connector
(DIDO) that stands on the eWON®’s bottom face.
Positions Mode
RS232
RS422, RS485
WITHOUT polarisation and termination resistors
RS422, RS485
WITH polarisation and termination resistors
Table 13: Serial mode configuration switches
Specification Value
Type 24 VDC isolated Digital Input - “sink” type
Input voltage range 0 to 24 VDC
Input voltage absolute max (varistor protection) 30 VDC
Zero state max input voltage (OFF) 0~5 VDC
One state voltage range (ON) 10 to 30 VDC
One state current (ON) 30mA/3k3=9mA (source: max 10mA)
Isolation 3,5 kV
Max frequency 10Hz
Pinout connector See label and appendix ( Input/Outputs on page 28 )
Table 14: Digital Input specification
OFF
ON
OFF
ON
OFF
ON