parkerVM600 MPC4 machinery protection card

also software configurable via RS-232 (on the front 

panel of the card).

DESCRIPTION (continued)

The “safety” (SIL) MPC4 card, known as the 

MPC4SIL, was developed to permit a wider range 

of installation options. Specifically, VM600 racks 

that also contain condition monitoring cards such 

as the XMx16 and relay cards such as the IRC4. To 

safety certify these configurations, it was 

necessary to ensure that the MPC4SIL is isolated 

from the other cards in a VM600 rack, so that 

there is no possibility of its configuration being 

inadvertently modified.

Therefore, the MPC4SIL card does not include a 

VME-compatible slave interface, does not 

support the tachometer (speed) channels and 

does not provide all of the signal processing 

capabilities of the “standard” MPC4 card 

(see Additional specifications – for “standard” 

and “separate circuits” MPC4 cards only on 

page 9).

Segregation of MPS and CMS

The VM600 rack, machinery protection cards, 

condition monitoring cards and associated 

software are designed for compliance with the 

machinery protection system (MPS) and condition 

monitoring system (CMS) segregation 

requirements of the API 670 standard, which 

ensures that the functionality of the MPS does not 

depend on and is not compromised in any way 

by the operation of the CMS.

So although machinery protection cards and 

condition monitoring cards can easily share 

sensor signals from measurement chains, MPC4/

IOC4T card pairs do not share any 

communication buses with XMx16/XIO16T 

condition monitoring card pairs in a VM600 rack, 

and MPC4/IOC4T card pairs are configured and 

operated using the VM600 MPSx software (while 

XMx16/XIO16T card pairs are configured and 

operated using the VibroSight® software).

Applications information

When used as a card pair with an IOC4T

input/output card, the MPC4 is highly suitable for 

machinery monitoring and protection in a wide 

range of industrial applications.

For further information on the use of MPC4/IOC4T 

card pairs in general, refer to the 

VM600 machinery protection system (MPS) 

hardware manual and the VM600 MPSx software 

manuals. For information on the use of MPC4/

IOC4T card pairs in functional safety contexts, 

refer to the refer to the VM600 functional safety 

manual.

For specific applications, contact your local 

Meggitt representative.

SPECIFICATIONS – COMMON TO ALL MPC4 CARDS

Dynamic signal inputs

Number of inputs : 4 per MPC4 card

DC range : 0 to +20 V or 0 to −20 V

AC range : ±10 V max.

Common mode voltage range : −50 to +50 V

CMRR : >60 dB at 50 Hz

Crosstalk : −72 dB

Input impedance : 200 kΩ

Current input range

• DC signals : 0 to 25 mA

• AC signals : ±8 mA max.

Analog frequency range : DC to 60 kHz (−3 dB).

Note: Applicable when dynamic signal outputs are shared using 

the Raw bus (VM600 rack). Dynamic signal outputs can be shared 

with XMx16/XIO16T card pairs but cannot be shared with other 

MPC4/IOC4T card pairs.

:

Analog AC frequency range

• Without integration : 0.1 Hz to 10 kHz

• With integration : 2.5 Hz to 10 kHz

Current measuring resistor : 324.5 Ω

Buffered dynamic signal outputs

The buffered “raw” dynamic signal outputs are available on the front-panel BNC connectors (MPC4 card) and 

the screw-terminal connectors (IOC4T card).

Output impedance : 50 Ω

Analog frequency range : DC to 10 kHz (−0.1 dB with a load >1 MΩ).

DC to 10 kHz (−0.2 dB with a load >200 kΩ).

DC to 40 kHz (−3 dB).

Note: Applicable when buffered “raw” dynamic signal outputs are 

shared using the front-panel BNC connectors (VM600 MPC4 card) 

and the screw-terminal connectors (VM600 IOC4T card).

Phase error : <5° (DC to 1 kHz).

<30° (DC to 10 kHz).

Transfer ratio

• Voltage input : 1 V/V 

• Current input : 0.3245 V/mA

Speed / phase reference inputs and outputs

See Additional specifications – for “standard” and “separate circuits” MPC4 cards only on page 9.

The “standard” and “separate circuits” versions of the MPC4 card support speed/phase reference inputs and 

buffered speed/phase reference outputs but the “safety” version of the card (MPC4SIL) does not.

Discrete signal interface (DSI) inputs

Discrete signal interface (DSI) control signal inputs are available on the associated IOC4T card.

Refer to the IOC4T input/output card data sheet for further information

Analog (DC) outputs and discrete outputs

Analog (DC) outputs and discrete outputs (relays) are available on the associated IOC4T card.

Refer to the IOC4T input/output card data sheet for further information.

Measurement chain OK check (OK system)

Number of levels : Two configurable threshold levels (upper and lower)

OK level range

• Voltage inputs : ±20 VDC

• Current inputs : 0 to 23 mA

Operating principle

• Powered sensors : Line-fault detection of conditions such as open-circuit or shortcircuit

• Unpowered sensors : Line-fault detection of conditions such as open-circuit

Processing functions

Broad-band processing

Filtering options : High-pass, low-pass or band-pass 

LP/HP ratio in pass band : 500 max.