Campbell TDR100 Manuál s instrukcemi stáhnout pdf (Strana 20)

TDR100

TABLE 5-1. SDM Addressing

Base 10

Number

Instruction 119

Address

(Base4)

TDR100

Thumbwheel

Switch

Level 1

SDMX50 Mux

(TDR100+1)

MSD LSD

Level 2

SDMX50 Muxs

(TDR100+2)

MSD LSD

Level 3

SDMX50 Muxs

(TDR100+3)

MSD LSD

0 00 0 0 1 0 2 0 3

1 01 1 0 2 0 3 1 0

2 02 2 0 3 1 0 1 1

3 03 3 1 0 1 1 1 2

4 10 4 1 1 1 2 1 3

5 11 5 1 2 1 3 2 0

6 12 6 1 3 2 0 2 1

7 13 7 2 0 2 1 2 2

8 20 8 2 1 2 2 2 3

9 21 9 2 2 2 3 3 0

10 22 A 2 3 3 0 3 1

11 23 B 3 0 3 1 3 2

12 30 C 3 1 3 2 3 3

13 31 D 3 2 3 3 not available

14 32 E 3 3 not available not available

15 33 F not available not available not available

5.5.2 SDM Cable and Cable Length Considerations

5-conductor cable with shield and drain is used for interconnection of SDM

devices. The 5 conductors are used for 12 volt power, ground and the 3 SDM

lines. A cable assembly (pn13776) is provided with the TDR100 and the

ENCTDR100. This assembly is for SDM connection between the TDR100

and a datalogger and between the TDR100 and a SDMX50 multiplexer.

Additional cable for SDM connection to other TDR system components is

available from Campbell Scientific as part SDMCBL-L with -L the cable

length in feet. The maximum recommended total length of all SDM cables

should not exceed 500 feet. Lengths greater than 500 feet can give unreliable

communication between SDM devices.

SDM communications use datalogger control ports 1, 2 and 3. No other

devices should be connected to these control ports.

The insulation for the individual wires of the SDM cable affects the frequency

response and reliability. PVC insulation has more attenuation than

polypropylene or polyurethane and should not be used for SDM

communication except when total SDM cable length is less than 250 feet.

5.6 ENCTDR100

Many TDR system applications require installation of equipment at field sites.

The ENCTDR100 is a weather-proof enclosure with a mounting plate for a

CR10X, CR23X, or CR1000 datalogger, power supply, TDR100, SDMX50SP,

cable strain relief bracket and associated cabling. The ENCTDR100 can be

mounted on a CM6 or CM10 tripod for free-standing installation.

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 55 56

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