Xylem H-424MS V1.0 - Manual (Page 25)

Appendix A
Specifications
H-424MS
Specifications A-1
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: 902.5 to 927.5 Mhz
Line of Sight: 10 plus miles - depending
on antenna and site
conditions.
Modulation Type: Direct Sequence Spread
Spectrum
RF Connector: Reverse Type-TNC
Transmission Power: 500 mW (=27 dBm)
Receive Sensitivity: -100 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 C
Storage Temperature: -50 to 70 C
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.