ME4640, ME4740 , ME4840 & ME49400 pages

Power Cube Control Valves

DATA SHEET

Terminal Unit Valves with Spring Return Actuators
ME-4640, ME-4740, ME-4840/44 & ME-4940/44
Description

Features
The hardware accommodates proportional, time proportional or floating
protocols and is configured by jumpers J3 and J4.
An appropriately programmed microprocessor must be installed.
Direct or reverse acting selected by jumper J2.

General Actuator Specifications

Supply: 24Vac +10%/-5%, 60Hz/50Hz
Motor Type: AC hysteresis brushless
Nominal Consumption: 6 Watts (9vA)
Ambient operating temperature: 0-50ºC (120ºF)
Typical opening (closing) time: 25 seconds
Signal output: 1-5Vdc +/- .1V impedance 100Kohms.
0 V is perceived as loss of power,
1V represents actuator in up position
5V represents actuator in down position
Output force: 28lbs (120N)
Motor jam recovery: if an unexpected stall occurs – i.e. in midrange – the
system reverses the motor, backs up, and then again attempts to move to the
calculated position
Position feedback (internal): Quadrature optical encoder
Drift: no detectable drift after 100,000 cycles Re-span (standard): after power
up as follows: drive to full closed. Reset count to zero. Allow (controlled) spring
return to full open, store span count, and then assume set point
Operating modes: proportional, time proportional, floating
Input Protection: inputs will accept 30Vac continuously without damage.
Misconnection (mixing) of the connections to unit will not cause damage
Wiring Connection: 32" PVC or optional Plenum cable
Agency approval: Conforms to CE/ROHS requirements
Class 2 as per UL/CSA

Installation Instructions
All Power Cube ME-4640, ME-4740, ME-4840, ME-4844,
ME-4940 and ME-4944 actuators can be installed on all
Spartan Zone valve bodies.
The commercial type valve bodies all utilise low zinc anti-dezincification
bronze coupled with long life replaceable and inter-changeable internals
from 0.15 to 9.0 Cv (0.13 to 7.75 Kv’s).
Refer to Control Valve Bodies Data Sheet.
Important: The actuator can be installed vertically, or at any angle
not exceeding the horizontal. Fig1. Care must also be taken to not
install the actuator with the back facing down. Fig 2.
The Actuator mounting thumbnut is
to be hand-tightened only, using tools
may result in over-tightening.
Fig. 2

Fig. 1

Thumbnut

Dimensions
30mm
(1.2”)

40mm
(1.6”)

77mm (3”)

125mm*
(5”)

Spartan Peripheral Devices telephone: (450) 424-6067 • fax: (450) 424-6071 • email: info@spartan-pd.com • website: www.spartan-pd.com

Priinted in Canada.

ME-4640, ME-4740, ME-4840/44 AND ME-4940/44 series spring return
proportional microprocessor based control valve actuators
There is a number of different types of modulating Spring Return Power Cubes
available, which are:ME4640 - Three point floating Spring Return normally open or up
ME4740 - PWM 0.25-5.0 secs Spring Return normally open or up
ME4840 - 0-10Vdc, 2-10Vdc or 4-20mA Spring Return normally open or up
ME4844 - 0-5 or 5-10Vdc Spring Return normally open or up
ME4940 - 0-10Vdc, 2-10Vdc or 4-20mA Spring Return normally closed or down
ME4944 - 0-5 or 5-10Vdc Spring Return normally closed or down
They drive 2, 3 or 4 port terminal unit or zone valves for the control of hot
water up to 250˚F (120˚C), chilled water to 35˚F (2˚C) 50% glycol, and low
pressure steam using an EV cartridge.
A 24Vac hysteresis brushless motor is used to position a valve in response to an
input signal (on red wire). A quadrature optical system using two LED’s, two
phototransistors and a rotating flag on the rear of the motor measure the
displacement of the valve. A microprocessor is used to access the input signal,
monitor and store the position count, determine the count difference and
appropriately control the drive to the motor.
At power-up the valve performs a 50 second re-span operation, the valve is
driven fully closed and then fully open. The perceived position outputs (on
green wire) as a 1-5V signal to use by others, for monitoring or positioning
other devices.
Upon power failure, the motor will be returned to its’ starting
open or closed position by the valve spring.

Zone Valves 4640 4740 4840/44 4940/44
27 February 2012