parkerVM600Mk2 MPC4Mk2 + IOC4Mk2 machinery protection modules

• Configurable inputs : Outputs from level 1 (basic) logic functions.

Note: Level 1 (basic) and level 2 (advanced) logic functions can 

be combined to generate more complex logic function.

Alarm update rate (internal) : 100 ms max.

Note: This is the time required for MPC4Mk2 + IOC4Mk2 modules to 

detect and initiate an alarm, including output relay (RL1 to RL4) 

activation.

Discrete signal interface (DSI) inputs

Control signal

• Alarm bypass (AB) : A closed contact between the DSI AB and RET inputs inhibits the 

activation of alarms and relays on MPC4Mk2 + IOC4Mk2 modules.

Note: The common circuit-fault relay (FAULT) is activated when 

Alarm bypass (AB) is enabled.

• Alarm reset (AR) : A closed contact between the DSI AR and RET inputs resets (clears) 

the alarms and relays latched by MPC4Mk2 + IOC4Mk2 modules.

Note: The Alarm reset (AR) input is edge-sensitive and a high-to-low 

transition is required to activate the reset. The Alarm reset (AR) input 

should not be held low and must transition low-to-high before 

another reset (high-to-low) can activate the reset.

• Trip multiply (TM) : A closed contact between the DSI TM and RET inputs multiplies the 

configured alarm levels for MPC4Mk2 + IOC4Mk2 modules by a scale 

factor (software configurable)

Operating principle : Detection of an open circuit or a closed circuit on the input

Buffered outputs – dynamic channels

Number : 4

Type : Buffered outputs (buffered “raw” analog signal).

Buffered analog signals corresponding to dynamic channel input 

channels (CH1 to CH4) are available on BNC connectors on the 

MPC4Mk2 module (front of rack) and on the J2 screw-terminal 

connector on the IOC4Mk2 module (rear of rack).

See Connectors on page 17.

Frequency bandwidth : DC to 60 kHz

Output impedance : <5 Ω

Accuracy

• Amplitude : ± 0.1 dB up to 20 kHz.

± 3 dB from 20 to 60 kHz.

• Phase : <1° from 10 Hz to 2 kHz.

<15° from 2 to 20 kHz.

Transfer ratios

• Voltage input : 1 V/V

• Current input : 0.2 V/mA

Admissible load on output

• Resistance : ≥50 kΩ

• Capacitance : Able to drive up to 3 m of cable with a typical capacitance 

of 100 pF/m

• Impedance : >50 kΩ with a load capacitance <5 nF

Buffered outputs – auxiliary channels

Number : 2

Type : Buffered outputs (buffered “raw” analog signal or TTL-level signal).

Buffered analog signals corresponding to auxiliary input 

channels (AX1 and AX2) are available on BNC connectors on the 

MPC4Mk2 module (front of rack) and on the J2 connector on the 

IOC4Mk2 module (rear of rack).

See Connectors on page 17.

Note: When an auxiliary input is configured as a tachometer input, 

a buffered TTL-level signal corresponding to the auxiliary input 

channel (AX1 or AX2) is available on the J2 connector on the 

IOC4Mk2 module (rear of rack). When an auxiliary input is 

configured as a DC input, no digital TTL-level signal is available.

Frequency bandwidth : DC to 60 kHz

Output impedance

• Buffered TTL-level signal

(tachometer input)

: <300 Ω

• Buffered “raw” analog signal

(DC input)

: <5 Ω

Signal levels : 0 to 5 V TTL-compatible signal (non-inverting)

Admissible load on output

• Resistance : >50 kΩ

• Capacitance : Able to drive up to 3 m of cable with a typical capacitance 

of 100 pF/m

• Impedance : >50 kΩ with a load capacitance <5 nF

Analog outputs

Number of local outputs : 4 single-ended outputs.

Used to output quasi-static measurement signals (DC).

Individually configurable as either current or voltage output signals.

Current outputs

• Range : 4 to 20 mA.

Two modes of operation are supported, as follows:

• Mode 1, measured value with quality checks – the analog output 

is driven in the 4 to 20 mA signal range during normal operation, 

and the analog output is driven to 2 mA to indicate a problem.

• Mode 2, measured value without quality checks – the analog 

output is driven in the 2 to 23 mA signal range.

Note: Current outputs are 0 mA ± 0.5 mA when disabled.

• Resolution : 10 µA

• Accuracy : ≤1% of full scale

• Admissible load on output : >360 Ω

Voltage outputs

• Range : 0 to 10 V.

Note: Voltage outputs are 0 V ± 10 mV when disabled.

• Resolution : 2.5 mV

• Accuracy : ≤1% of full scale

• Admissible load on output : >50 kΩ with a load capacitance <5 nF

Update rate / frequency bandwidth : 100 ms / 10 Hz max.

Short-circuit protection : Yes

Discrete outputs

Relays

• Number : 5.

4 × output relays (RL1 to RL4) – suitable for alarm and/or 

status outputs.

1 × common circuit-fault relay (FAULT) – for fault indication.

See Relay characteristics on page 14.

• Configurable functions : Normally energized (NE) or normally de-energized (NDE).

Latched or unlatched.

• Configurable inputs : From the sensor OK checks, the measurement alarms (Danger+, 

Alert+, Alert−, Danger−) and/or the logic functions of the MPC4Mk2

module

Communication interfaces

External (Ethernet)

• Number : 1.

Available on LAN connector of the MPC4Mk2 module.

See Connectors on page 17.

• Network interface : 10/100BASE-TX

• Data transfer rate : Up to 100 Mbps

• Maximum distances : System Ethernet communications can support distances up to