Chapter 9 ____________________________________________________________ Technical Data
VAISALA______________________________________________________________________ 129
Table 28 Data Line
Property Description / Value
Connector (J3) Type Binder series 693, 09-4227-00-07
7-pin (male)
Mating connector type Type Binder series 693, 99-4226-70-07
(female) elbow
Baud rate 19200 bps standard with RS-232
300, 1200, 2400, 4800, 9600, 19200, 38400,
57600, 115 200 bps available
300, 1200 or 2400 bps available with modem
DMX501
Max. distance to operate 300m (1000 ft) with RS-232,
1.2 km (4000 ft) with RS-485, all at 2400 bps
with typical communication cables
10 km (6.2 mi.) with Modem
Standard character frame 1 Start Bit
8 Data Bits
No Parity
1 Stop Bit
Standard character code USASCII
Pin connections 1 RS485 -/RTS# (no SW support)
2 RS485+/RS-232 RxD/ Modem Lead A
3 Modem Lead B /RS-232 TxD
4 Ground
5 CTS# (no SW support)
6 +12 V DC (700 mA continuous, for local
external equipment)
Modem circuits are non-polar and symmetrical. All modem circuits are
electrically floating to overvoltage protection rating (300 V - 500 V).
Overvoltage protection in
each circuit
Primary: Noble Gas Surge Arrester
Secondary: VDRs, Transient Zener Diodes or
normal Diodes
NOTE
For information on data line connection options, see Figure 12 on page
36, Figure 13 on page 37, and Figure 14 on page 38.
External Connector J4 - Maintenance
Line
Maintenance line is intended for on-site maintenance and can be used
with a Ceilometer Maintenance Terminal, PC, or other terminal.
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