D

1

©

D

P

2

D

L

T

Y

S

M

X

0

SPECIFICATION

ABSOLUTE MAXIMUM RATINGS

Storage Temperature........................................ -30 to +85 Celsius

Operating Temperature .................................... -10 to +55 Celsius

Power Supply Voltage ..................................... +/- 35Vdc

Digital Inputs..................................................... +35Vdc to –5V

Analogue Inputs................................................ +35V to –5V

External Regulated Power Source .................... +100mA

DIMENSIONS

Length = 160mm Width = 80mm

Height = 55mm

ELECTRICAL

CHARACTERISTICS

MIN

TYPICAL

MAX

DIMENSION

NOTE

Frequency Range

130

400

860

180

500

960

MHz

MHz

MHz

VHF

UHF

UHF

Channel Separation

12.5

25.0

KHz

Modulation

GMSK

RF Power

5

500

500

mW

Digital Inputs

7

30

V

Analogue Inputs

0

0

20

5

J, K

20

10

mA

V

Current I/P

Voltage I/P

Thermocouple

Volt Free Contacts

30

125

Vdc

Vac

At 1A

At 0.5A

Analogue Outputs

0

0.5

20

5

20

10

mA

V

12 bit resolution

Power Supply Voltage

14

110

30

240

Vdc

Vac

DC PSU

AC PSU

Transmit Current

80

410

90

420

120

440

mA

mA

10mW ERP

500mW ERP

Receiver Current

150

160

180

mA

Standby Current

2

3

4

mA

XNET OPERATION

XNET control modules communicate with each other by means of time division multiplexing.

All control

modules in the network are set by the user to the same RF frequency and then programmed with consecutive

node addresses. These are then used as time slots. The control module with time slot zero will start the

sequence by transmitting the status of its inputs with the addresses of the destination digital outputs. After

receiving data from the first Node a timing pulse will be sent from Node 0 to request data from the next Node.

When there is a time break of 6 time slots, the control module with time slot zero will start the sequence again.

The network can be easily expanded by adding control modules programmed with the next node address in

the sequence.

XNET control modules can be configured as repeaters thereby extending the range of a network over

geological obstacles.