Vanderbilt VR50M-MF - Connecting Multiple Readers to ACT in OSDP Mode

For more information on how to correctly locate and fit the terminal blocks, see Connecting the cables
on page17.
Cable length guide
Mode Max. Cable length Cable
OSDP 1 km.
Screened twisted pair (For
example; Belden 9501)
10.2 Connecting multiple readers to ACT in OSDP mode
An ACTpro 1520 controller can support multiple VR series readers on the same OSDP bus.
A B C
Address 1 Address 2
Address 3 (End Of Line)
Jumper 1 ON Jumper 1 ON
Jumper 1 ON
Jumper 2 OFFtop 2 links Jumper 2 OFFtop 2 links
Jumper 2 OFFtop 2 links
Jumper 3 OFF Jumper 3 OFF
Jumper 3 ON
l Set the End Of Line (EOL) jumper on the ACT pro controller as shown.
Wire the connections between the VR series readers and an ACTpro 1520 controller as follows:
VRxx-MF - AB-+ Terminal
block
ACTpro 1520
+
+12/24 V
-
0V/GND
Mullion Reader VR20 VR50 – Installation Manual Connecting VR20/VR50 readers to ACT
© Vanderbilt 2021 34
A-100410-d
12.02.2021