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VEMCO - VR2C Manual
9
Jul 2018
10
2.2.2.4
VR2C Communications Package – RS485
The RS485 communication package consists of:
Sealevel USB to RS485 converter and Sealevel CD
DB9 to screw terminal block (RS485 version)
VR2C external cable with flying leads
VEMCO Product CD including VUE software
2.2.2.5
RS485 Screw Terminal and VR2C External Cable Pinout
2.2.2.6
USB to RS485 Converter Installation
Install the Sealevel software
before
inserting the USB connector into the PC. Follow the installation
instructions that are on the Sealevel CD. During installation, the user needs to enter the Sealevel part
number which is
2107
.
Screw
Label
Signal Name
Flying Lead from
VR2C Cable
S
CGND (Shield)
Silver
G
RS485 D-
Green
W
RS485 D+
White
R
DC + (+12V to +32V)
Red
B
DC
– (GND)
Black
USB to RS485 converter and terminal block
Screw labels on terminal block
Flying Lead connected to
terminal block
NOTE:
It is not necessary to provide external
DC power to the VR2C provided the
internal battery is connected. If
providing external DC power via the
screw terminal block, caution must be
exercised to ensure that the
voltage
polarity is correct
.