Introduction to the SINAUT ST7 system
2.5 Mobile wireless components
SINAUT ST7 Station control system - System Manual
70
System Manual, 05/2007, C79000-G8976-C178-06
Technical specifications of the MD740-1 GPRS modem
MD740-1
General
Interfaces
•
Application interface
•
Service interface
•
Antenna connector
•
Connection to power supply
•
RJ-45 female (10/100 Mbps, TP,
autocrossover)
•
9-pin D-sub female connector
(with gender changer pin)
•
SMA female connector,
nominal impedance: 50 ohms
•
4-pin screw terminal
Power supply
18 - 30 V DC (24 V DC nominal)
Current consumption
•
with existing GPRS connection and data
exchange
•
I
n
: 320 mA at 24 V (I
burst
: 800 mA)
4.62 ms burst repetition rate
Power loss
typically 8.0 W
Permitted ambient conditions
•
Operating temperature
•
Transport/storage temperature
•
Relative humidity
•
0 °C t50 °C
•
-25 °C t85 °C
•
Max. 95 % at +25 °C
Construction
•
Design
•
Materials
•
Dimensions (W x H x D) in mm
•
Weight
•
DIN rail housing
•
Plastic
•
45 x 99 x 114
•
Approx. 280 g
Installation
Snap onto 35 mm standard rail
Degree of protection
IP20
GSM/GPRS
Frequency ranges
800, 900, 1800 and 1900 MHz
Transmit output power
•
850 / 900 MHz
•
1800 MHz
•
Max. 2 W
•
Max. 1 W
GPRS multislot class
10
up to 2 uplinks (13.4 - 27 Kbps),
up to 4 downlinks (40 - 54 Kbps),
max. 5 slots
GPRS coding methods
CS-1, CS-2, CS-3, CS-4
GPRS connection establishment
Automatic when power supply turned on
Virtual Private Network (VPN)
Protocol
Ipsec (tunnel and transport mode)
Encryption
Ipsec DES with 56 bits,
Ipsec 3DES with 168 bits,
Ipsec AES with 128, 192 and 256 bits
Internet Key Exchange (IKE)
with main and quick mode
Authentication
Pre-Shared Key (PSK),
X.509v3 certificates