VIBRO-METER IOCN 200-585-000-321 I/O Interface Card



VIBRO-METER   IOCN  200-585-000-321 I/O Interface Card

Different versions of the MPC4 card

The MPC4 machinery protection card is available in different versions, including a standard

version, a separate circuits version and a safety (SIL) version.

NOTE: Both the standard and the safety (SIL) versions of the MPC4 card are certified to

IEC61508 and ISO13849. The MPC4SIL version was developed to permit a wider

range of installation options.

The original IEC61508 and ISO13849 certification process targeted a VM600 rack for

safety-related system (SRS) applications with a limited range of cards, that is, standard

MPC4/ IOC4T card pairs and RLC16 relay cards (see4.1.1Standard version of the MPC4).

Then Meggitt vibro-meter® (MeggittSA) decided to safety certify another system with

additional functionality, such as monitoring. To safety certify such a VM600 rack, it was

necessary to ensure that there is no possibility of the configuration being inadvertently

modified. The safety version of the MPC4 card (MPC4SIL) overcomes this potential

configuration issue by not implementing a VME bus interface, so data corruption via the

VM600 rack backplane’s VME bus is impossible.

4.1.1Standard version of the MPC4

The standard MPC4 card is the original version, intended for systems using a VM600 rack

with a limited range of cards, that is, standard MPC4/ IOC4T card pairs and RLC16 relay

cards.

The standard MPC4 has a VME-compatible slave interface and is software configurable via

RS-232 (on the panel of the MPC4 card) or via VME for a networked VM600 rack. It also

supports all processing modes (see Table7-1).

4.1.2Separate circuits version of the MPC4

The separate circuits version of the MPC4 card is intended for systems using a separate

circuits version of the VM600 rack. The separate circuits MPC4 was developed in accordance

with the CEI/IEC60255-5 standard: “Insulation coordination for measuring relays and

protection equipment – Requirements and tests” and has slightly different circuitry

(see9.10Grounding options).

Like the standard MPC4. the separate circuits MPC4 has a VME-compatible slave interface

and is software configurable via RS-232 (on the panel of the MPC4 card) or via VME for a

networked VM600 rack. It also supports all processing modes (see Table7-1).

4.1.3Safety version of the MPC4

The safety (SIL) version of the MPC4 card, that is the MPC4SIL, was developed to permit a

wider range of installation options with a single VM600 rack, for example, condition

monitoring in addition to machinery protection. To safety certify these systems, it was

necessary to ensure that the safety MPC4 is isolated from the other cards in a VM600 rack,

so that there is no possibility of its configuration being inadvertently modified.

As the safety MPC4 (MPC4SIL) does not have a VME bus interface, corruption of its

configuration is impossible as it is only software configurable via RS-232 (on the panel of the

MPC4 card). Therefore, it is now possible to define a single VM600 rack configuration

containing condition monitoring cards (such as the XMx16) and relay cards (such as the IRC4

and RLC16) in addition to safety-related machinery protection in the form of safety MPC4

cards.

However, the safety MPC4 card (MPC4SIL) does not support all of the processing modes

supported by the standard and the separate circuits versions of the MPC4 cards (see

Table7-1). For example, the MPC4SIL card does not support the speed/phase reference

(tachometer) input channels, the Narrow Band (Tracking) Vibration and Smax processing

functions, and it does not support the danger bypass (DB), trip multiply (TM) and channel

inhibit functions.

In addition, the use of standard MPC4 cards or safety MPC4 cards in a machinery monitoring

system for a safety-related application requires that the complete system configuration is

manually reviewed in order to:

• Ensure that the VM600 rack configuration is permitted.

• Avoid possible conflict from additional cards.

• Ensure that the MPC4 cards’ configurations are permitted.

NOTE: Refer to the VM600safety manual for further information.

4.1.4 Identifying different versions of the MPC4 card

The different versions of the MPC4 card can be visually identified from their panels, as the

lower handle on the panel is different.

• For the standard and separate circuits versions of the MPC4 card, the label on the lower

handle of the panel displays the text “MPC4” against a blue background, as shown in

Figure4-1(a).

• For the safety (SIL) version of the MPC4 card, the label on the lower handle of the panel

displays the circular TÜVNord logo and text “MPC4” against an orange background, as

shown in Figure4-1(b).

The ordering number (PNR) for a MPC4 card is in given in the format 200-510-SSS-xHh.

In this PNR, x represents the version of the MPC4 card as follows:

• 1 indicates the standard version of the card.

• 2 indicates the separate circuits version of the card.

• 3 indicates the safety (SIL) version of the card.