Xylem H-424MS V1.1 - Manual (Page 21)

Appendix A
Specifications
Protocol
Local:
SDI-12
Remote: SDI-12
Type: Transparent SDI-12.
Works with all SDI-12
commands including extended
and V1.2 commands.
Requirements: Data logger must support
multiple (3/3) SDI-12
breaks with retries.
Radio
Frequency Range:
902 to 928 Mhz
Line of Sight: 7 plus miles - depending on
antenna and site conditions.
Modulation Type: Frequency Hopping Spread
Spectrum
RF Connector: Reverse Type-TNC
Transmit Power: 100 mW (20 dBm)
Receive Sensitivity: -110 dBm
SDI-12 Output
Baud Rate:
1200
Protocol: SDI-12, 7-bit even parity,
1 stop bit
Output Voltage Levels:
minimum high level:
3.5 volts
maximum low level: 0.8 volts
Power Requirements
Voltage Input:
9.6 to 18.0 Volts DC
Power Control: Remote station uses
programable sleep/wakeup to
detect carrier.
Current:
Standby: 510ua (sleep)
Receive: 135 mA
Transmit: 800 mA
Average w/
power control: Less than 2.0mA
Environmental
Operating Temperature:
-40 to 60 EC
Storage Temperature: -50 to 70 EC
Humidity: 0 to 100%
Mechanical
Enclosure:
Fiberglass, NEMA 4
Size: 8.00 x 6.00 x 4.00 in.
W/ hinged screw cover
Connector
H-424-MS:
Switchcraft EN3P4M
(4-pin male)
Mate: Switchcraft EN3C4F
(4-pin female)
Warranty
The W
ATER LOG ® H-424MS is warranted against
defects in materials and workmanship for one year
from date of shipment.
H-424MS
Specifications A-1