HIMA X-AO1601 Termination Boards

HIMA X-AO1601 Termination Boards

Product Specifications

2.1 Function

Isolated barriers are used to protect intrinsically safe circuits in explosive areas.

In addition to the required current, voltage and power limitation, the isolated barriers have

a galvanic isolation between the field circuit and the controller.

The H-System isolated barriers are mounted on termination boards. Pre-wiring is possible

on termination boards. To close the signal circuit, the isolated barriers are simply plugged in.

The isolated barriers can be replaced during live operation when the wiring is connected.

Generic and control-system specific termination boards are available in the H-System.

Termination boards can be adapted to specific input/output requirements.

These requirements can be implemented via

• Various connecting plugs to the controller

• Various terminals to the field device

• A large selection of isolated barriers

2.2 Isolated Barriers

H-System isolated barriers cover all functions and the interoperability of the H-System.

The pin assignment and terminal designations are consistent for all termination boards.

Each H-System isolated barrier can therefore be mounted in each termination board slot.

The termination board can be coded together with the isolated barriers.

This prevents the isolated barriers being mixed up on the termination board.

The safety-relevant data for the connected field devices is backed up.

Note

See system manual for further information.

Termination Boards

Termination boards form the wiring level for field and control signals. The isolated barriers

are mounted on termination boards. The isolated barriers are connected with the field

and control side via the termination boards. Once the isolated barrier is mounted,

the signal circuit between the field and control side is closed.

Figure 2.1 Connection example termination board with 16 slots

Features depending on version

• With 16 or 32 slots

• For redundant and fused power supply

• For fault monitoring and diagnostics

• HART communication

2.3.1 Connection Options

A variety of termination boards is available with different methods of connecting to the field

and control side. Please refer to the documentation for the respective device for the specific

connection layout.

Connecting the Field Side

The field devices are connected to the termination board via spring terminals.

Figure 2.2 Connection via field-side spring terminals

1 Field side connection

2 Connection power supply and fault indication output

3 HART communication connection, if available

4 Control side connection

Isolated Barriers

The isolated barriers are supplied via the termination board. The isolated barriers are therefore

attached to the termination board.

Termination boards

The termination boards are supplied via pluggable spring terminals..

The supply voltage range depends on

• The values used for the isolated barriers

• The voltage drop of the decoupling diodes on the termination board

Figure 2.3 Connection of power supply and fault indication output via pluggable spring terminals

Connecting the Control Side

The termination board is connected on the control side via the HIMA system connector.

Figure 2.4 Connection via HIMA system connector, 96-pin

In the case of a signal splitter application, you can connect the termination board via spring

Status Indicators of Termination Boards

LEDs are often used on termination boards to indicate different statuses (e. g. for power

supply, device failure, status messages). Standard LED colors are assigned to the status

display according to NAMUR NE 44.

Figure 2.8 Example status indicators

LED Display function Display Meaning

Green LED PWR1 Power supply I On Power supply OK

Off No power

Green LED PWR2 Power supply II On Power supply OK

Off No power

Red LED FAULT Power supply failure On Power supply failure

Device fault Flashing Module fault, module failure

Green LED Run Connection status On The HIMax I/O module is supplied with power

and is connected to the termination board (FTA)

via a system cable.

Red LED Field Connection failure On The HIMax I/O module detects faults

in the connection between HIMax I/O module

and termination board (FTA).