Bosch Rexroth IndraControl VDP 16.1, Project Planning Manual

Page: 67 / 90

VDP 16.1, VDP 40.1 and VDP 60.1 Interfaces
7-9
DOK-SUPPL*-VDP16/40/60-PR02-EN-P
Digital 24 V Input (Changeover Input)
The selection, which of the VDP displays connected to the Y-Repeater is
activated, occurs via a digital 24 V input.
As the image signals are transmitted to both VDP displays, data can only
be entered with the active VDP.
+
N.C.
-
X21
2
3
1 X21
1 2 3
X21.FH9
Fig. 7-17: Assignment of the digital 24 V input
Pin Labeling Function
1 + Signal input
2 - Signal ground
3 N.C. not assigned
Fig. 7-18: Pin assignment X21
Input bit X21 Active VDP
0 (or open) VDP1
1 VDP2
Fig. 7-19: Selection of the active VDP
Connection method 2-wire connection
Reverse voltage protection Yes
Input voltage:
Nominal value at “0”
Nominal value at “1” -3 V ... + 5 V
11 V ... 30 V
Input current:
Nominal value at “0”
Nominal value at “1” < 2,5 mA
2,8 mA ... 6 mA
Cable length (unshielded) < 100 m
Short-circuit protection, overcurrent
protection Typ. 0.6 A
Fig. 7-20: Characteristic value of the digital 24 V input
Note: During the booting process of the IPC you must not switch
from VDP1 to VDP2.
X21 –
Digital 24 V Input