Siemens Pacemaker UM344-2 Manual do Utilizador descarregar pdf (Página 40)

INSTALLATION UM344-2

September 1995

FIGURE 4-1 Point-To-Point Network (Analog Mode)

FIGURE 4-2 Model 352 SLDC and Model 344 Connections (Analog Mode)

250

See

Note 1

Model 352

Rear

Terminals

See Note 4

MXC

Hazardous

Location

Non-Hazardous

Location

Notes:

1. Network resistance equals the sum of the barrier resistances and

the current sense resistor. Minimum value 250 Ohms; maximum value 1100 Ohms.

2. Connect the M XC (a Secondary Master) to the loop only in the non-hazardous location.

The MXC is a non-polar device.

3. Interconnect all cable shields and ground only at the power source.

4. Model 352 Rear Terminal Assignments

A4 - Analog Input 1 (AI1+)

A5 - Analog Input Common (AIC)

B5 - Two-Wire Transmitter Power (+26 Vdc)

AG - Case (Safety) Ground

See Installation And Service Instruction SD352 or User's Manual UM352-1

5. For access to Model 344 terminals, remove enclosure end cap.

6. Maximum loop cable length calculated by formula in Section 4.3.5.

Supply and

Return Barriers

Shown Above

See Note 3

See

Note 2

See Note 5

See Note 6

Signal Test

X02867S1

Model 344

Terminals

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 182 183

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Siemens Pacemaker UM344-2 Manual do Utilizador Página 40