MP-V Controller Installation

The MP-V controller is a multi-purpose, fully programmable, IP-based field controller dedicated for VAV applications. The MP-V integrates a controller, universal inputs, Triac outputs, voltage and current output(s), a damper actuator, and an air flow pressure sensor in a single package for ease of installation.

There are two MP-V models with different electrical I/O point counts and mixes. Both MP-V models provide a serial port for the sensor bus. This port and the room space sensors connected to it do not participate in smoke control applications. The MP-V provides the same universal input capability as the MP-C models. However, the MP-V does not incorporate the analog output (voltage output) contained in the MP-C universal I/O (type Ub). On the MP-V, these inputs are referred to as type UI instead of the Ub in the MP-C.

The MP-V provides one or more separate analog outputs with one terminal that delivers a voltage output of 0 to 10 Volts and another terminal delivering a Current output of 0 to 20 mA. The damper actuator mounting with the actuator hub allows for simplified installation of the MP-V directly over the damper shaft. Typically, VAV controllers are applied in non-dedicated smoke control applications.

Like the MP-C models, the MP-V provides a USB device port and a USB host port. These ports are non-functional when operating in the smoke control application and should be left vacant or unconnected.

The MP-V models do not have universal I/O points (type Ub or Uc). However, they do contain universal inputs (type UI) that accept the full assortment of input signals provided by the type Ub and Uc points, including the following inputs:

In addition to the universal input functions, the MP-V has one or more separate analog outputs that provide both a voltage output (0 to 10 Volt) on one terminal and a current output (0 to 20mA) on a second terminal. The model MP-V-7A contains one of these voltage or current output terminal pairs and the model MP-V-9A contains two voltage and current output terminal pairs.

Digital Output Triac Types

Both of the MP-V models provide three digital output Triac types. On the MP-V, these three Triac outputs share a single isolated common (COM) terminal. The Triac outputs carry the same rating as those on the MP-C which is up to 30VAC @ 0.25A. This current limit applies to UL 864 smoke control applications and is a derating of the product label rating. The 0.25A limit accommodates the internal component temperature limits required for UL 864.

The Triac output common (COM) terminal can be connected to either 24VAC for high side switching or to ground for low side switching as needed by the field wiring configuration.

The primary I/O type unique to the MP-V series is the damper actuator and the VAV air velocity pressure sensor input. The MP-V uses the ½ inch diameter VAV damper shaft as the primary means of mounting the controller. The actuator hub contains a hole through the center that slides over the ½ inch shaft until flush with the VAV duct surface. An adapter (AM-135) is available to allow mounting on a 3/8 inch shaft.

The MP-V is secured to the damper shaft with two set screws provided in the actuator hub collar. A bracket (anti-rotation clip) is provided along the base of the MP-V plastic base assembly. If needed, an alternate location for the clip is provided along the right side. A sheet metal screw is used to fasten the bracket to the VAV duct surface. The bracket attachment serves to keep the base of the actuator stationary and cause the force or torque of the actuator motor drive (up to 6 Nm (53 lbf.in) to be exerted on the damper shaft and not allow the MP-V to rotate when encountering shaft rotation friction. The actuator allows a range of rotation up to 90 degrees.

Two tubes from the VAV box air velocity pickup probe (internal to the VAV inlet) are connected to the pneumatic barbed fittings along the left side of the MP-V. There is a high side pressure tube and a low side pressure tube and these connect to the ports of the same name and marked on the plastic case. The internal pressure sensor measures a minimum pressure range of 0 to 249 Pa (0 to 1 inch H2O). The VAV application program is configured to convert the velocity pressure into an air flow rate (CFM).

I/O Point Type and Capacity

I/O Point Types	MP-V-7A-SMK	MP-V-9A-SMK
Universal input type UI	3	4
Analog output (VO and CO)	1	2
Triac outputs	3	3

Mechanical Dimensions

Mounting Orientation

For the UL 864 applications discussed in this guide, the MP-V controllers can be mounted in three of the four orientations (quadrant) around the horizontal damper shaft from the VAV box. The only disallowed orientation is B in the following image:

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Orientations

MP-V Controller Component Locations

The MP-V controller components and their locations are shown in the following graphic:

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MP-V controller components

MP-V-7A-SMK Terminals

The MP-V-7A contains 3 universal inputs, 1 analog output (voltage and current) and 3 isolated Triac DO outputs for seven total I/O points – not including the rotary damper actuator and the velocity pressure sensor input. For electrical signal connections, the controller is equipped with four pluggable terminal blocks.

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MP-V-7A-SMK terminals

Table: MP-V-7A-SMK Screw Terminals

Terminal number	Designation	Power Input
1	24 VAC	24 VAC, 50/60 Hz, 21VA
2	action_zoom_plus_stroke	Low side of 24VAC transformer and ground connection Terminal 2 internally connects to all RET terminals
Universal input points type UI
3	UI1	Universal input #1, type UI
4	RET	Signal return/common/ ground
5	UI2	Universal input #2, type UI
6	UI3	Universal input #3, type UI
Analog outputs: Voltage 0-10V and current 0-20mA
11	RET	Signal return/common/ ground
12	CO1	Current output (0-20mA)
13	VO1	Voltage output (0-10V)
DO Triac outputs (<=30VAC, 0.25A)
15	DO3	Triac output #3
16	DO2	Triac output #2
17	DO1	Triac output #1
18	COM	Common connection for DO1, DO2, and DO3 The COM terminal can be connected to 24 VAC for high-side switching or to ground for low-side switching.

MP-V-9A-SMK Terminals

The MP-V-7A has 4 universal inputs, 2 analog output (voltage and current) and 3 isolated Triac DO outputs for nine total I/O points – not including the rotary damper actuator and the velocity pressure sensor input. For electrical signal connections, the controller is equipped with four pluggable terminal blocks.

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MP-V-9A-SMK terminals

Table: MP-V-9A-SMK Screw Terminals

Terminal number	Designation	Usage
1	24 VAC	24 VAC, 50/60 Hz, 22 VA
2	action_zoom_plus_stroke	Low side of 24VAC transformer and ground connection Terminal 2 internally connects to all RET terminals
Universal input points type UI
3	UI1	Universal input #1, type UI
4	RET	Signal return/common/ ground
5	UI2	Universal input #2, type UI
6	UI3	Universal input #3, type UI
7	RET	Signal return/common/ ground
8	UI4	Universal input #4, type UI
Analog outputs: Voltage 0-10V and current 0-20mA
9	CO2	Current output #2 (0-20mA)
10	VO2	Voltage output #2, (0-10V)
11	RET	Signal return/common/ ground
12	CO1	Current output #1 (0-20mA)
13	VO1	Voltage output #1 (0-10V)
DO Triac outputs (<=30VAC, 0.25A)
15	DO3	Triac output #3
16	DO2	Triac output #2
17	DO1	Triac output #1
18	COM	Common connection for DO1, DO2, and DO3 The COM terminal can be connected to 24 VAC for high-side switching or to ground for low-side switching.

Functionality

Products

How to

Specifications

Troubleshooting

Developers Reference

Concept

MP-V Controller Installation

Digital Output Triac Types

I/O Point Type and Capacity

Mechanical Dimensions

Mounting Orientation

MP-V Controller Component Locations

MP-V-7A-SMK Terminals

MP-V-9A-SMK Terminals

Functionality

Products

How to

Specifications

Troubleshooting

Developers Reference

Concept

MP-V Controller Installation

Digital Output Triac Types

I/O Point Type and Capacity

Mechanical Dimensions

Mounting Orientation

MP-V Controller Component Locations

MP-V-7A-SMK Terminals

MP-V-9A-SMK Terminals

See Also