Black Box IC108A Guía de usuario descargar pdf (Pagina 31)

Advant

Smart Device (HART

) Interface User’s Guide

Section 2.3.1 Connecting to a SHIM

3BUR 001 085R0001 REV A 2-19

In addition to the terminal blocks on the SHIM’s front panel, there is a red LED and a fuse. The

LED flashes to signal that the SHIM passed its self test and is running. The fuse is a 0.5 Amp

Excitation fuse which is shared by all smart devices connected to the SHIM to protect their

Excitation connections. There are also two other red diagnostic LEDs visible from the top of the

SHIM’s housing. If either of these LEDs is flashing, an error has been detected. See Section 5.2,

Hardware Indicators for information about the errors the diagnostic LEDs indicate.

Signal designations for the contact positions of the SHIM terminal blocks and their use are

provided in Table 2-11.

2.3.1.1 SHIM Power

SHIMs are powered by a small AC/DC power supply. The physical power and ground

connections from the power supply are made at the screw terminations XTB1-1 and XTB1-2 of

the SHIM as indicated in Table 2-11.

2.3.1.2 SHIM Serial Port Connections

As indicated in Table 2-11, terminal block XTB1 also has contacts for 2 serial ports which

independently communicate ModbusB protocol using either RS-232 or RS-485. Connections

between the MVI serial ports and the serial port contacts on a SHIM are made using either the

3BUC900040R0001 MVI to SHIM Interface Cable or 3BUC900041R0001 MVI to RS-232/485

Converter Interface Cable.

The 3BUC900040R0001 MVI to SHIM Interface Cable connects an MVI RS-232 port to a

SHIM RS-232 serial port. Connection to the serial port is made with a female connector, and

Table 2-11. SHIM Terminal Block Designations

XTB1 XTB2 XTB3 (SHIM-8 ONLY)

Contact Signal Use Contact Signal Use Contact Signal Use

1 +24 VDC Power 12 EXCITATION Smart Device 1 1 SIGNAL- Smart Device 8

2 COM Ground 11 SIGNAL+ 2 SIGNAL+

3TX RS-232

Serial Port

10 SIGNAL- 3 EXCITATION

4 RX 9 EXCITATION Smart Device 2 4 SIGNAL- Smart Device 7

5RTS 8SIGNAL+ 5SIGNAL+

6CTS 7SIGNAL- 6EXCITATION

7 COM 6 EXCITATION Smart Device 3 7 SIGNAL- Smart Device 6

8DATA+RS-485

Serial Port

5SIGNAL+ 8SIGNAL+

9DATA- 4SIGNAL- 9EXCITATION

10 COM 3 EXCITATION Smart Device 4 10 SIGNAL- Smart Device 5

2SIGNAL+ 11SIGNAL+

1SIGNAL- 12EXCITATION

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 117 118

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