Vaisala PTB210 (serial) - Manual (Page 14)

User's Guide ______________________________________________________________________
12 __________________________________________________________________ M210669EN-D
RS232C/TTL
Table 3 Connections of the PTB210 Barometer with
RS232C/TTL Interface
Wire color Signal
Grey RX (with RS232C)
Green TX (with RS232C)
Blue Ground
Pink Supply voltage (5 ... 28 VDC)
Brown RXD
(TTL level)
White TXD (TTL level)
Yellow External power control
(TTL level: 1 = off, 0 = on)
NOTE The two output protocols cannot be used simultaneously. Connect
either RX/TX or RXD/TXD wires. It is recommended to isolate the
free wire ends.