VEMCO - VR2C Manual
9
Jul 2018
8
2.2.2
Connecting to the PC
Connecting a VR2C to a PC in a lab setting is best accomplished with the use of a VR2C Communication
package. There are currently two different VR2C Communication packages reflective of the different cables
that can be used for communication, RS232 or RS485. The communication packages are intended to allow
the customer to communicate with the VR2C in an office or lab setting using a PC.
2.2.2.1
VR2C Communications Package – RS232
The VR2C Communication Package for RS232 consists of:
USB to RS232 converter (US232R-10 device available from
FTDI Chip)
DB9 to screw terminal block (RS232 version)
VR2C external cable with flying leads
VEMCO Product CD including VUE software
2.2.2.2
RS232 Screw Terminal and VR2C External Cable Pinout
Screw
Label
Signal Name
Flying Lead from
VR2C Cable
S
CGND
Silver
G
RS-232 RX (to PC)
Green
W
RS-232 TX (from PC)
White
R
DC + (+12V to +32V)
Red
B
DC -
Black
USB to RS232 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
.
