3Com MS40-717X Wiring Requirements, Control and Power Leads, Control and Power Wiring Data

AM-753

Universal

Mounting

Clamps

1

AM-676 Universal Shaft Extension

V-clamp

Duct

Actuator

Anti-rotation Bracket (included with actuator)

Mounting Surface

1The AM-676 extends the damper shaft approximately 9" (229 mm).

Damper Shaft

	Figure-13 Installation of Universal Shaft Extension.
Wiring Requirements	Control and Power Leads
	Remove blue plastic thread protectors before installing conduit fittings. See Figure-1through
	Figure 8 for typical wiring applications and Table-3for maximum wire lengths.
	Caution: The 24 Vac model contains a half-wave rectifier power supply and must not be
	powered by transformers used to power other devices utilizing non-isolated full-wave
	rectifier power supplies. Refer to EN-206 Guidelines for Powering Multiple Full-Wave and
	Half-Wave Rectifier Devices from a Common Transformer, F-26363, for further information.
	Note: Class 2 control and power lead wiring must be routed separately from line voltage
	wiring and any other non-class 2 circuits.

Table-3 Control and Power Wiring Data.

Actuator	Part	Maximum Wire Run in ft. (m)
			(5% Voltage Drop)
Voltage	Number
		14 AWG		16 AWG	18 AWG
24 Vac and	MS40-7173
22-30 Vdc		981		617	388
120 Vac	MS40-7170	(299)		(188)	(118)
240 Vac	MS40-7171

Table-4 Wire Color Codes for Models Manufactured before December, 2007.

Part Number	Power	L1	L2	Ground	24 H	24 G	Analog	500 Ohms	Common
	Voltage						Input
MS40-7173-0-0-0	24 Vac	N/A	N/A	Green/Yellow	Black	Black/Blue	White	Red	Black
Old Design
MS40-7170-0-0-0	120 Vac	Black	White	Green/Yellow	N/A	N/A	White	Red	Black
Old Design
MS40-7171-0-0-0	240 Vac	Brown	Light	Green/Yellow	N/A	N/A	White	Red	Black
Old Design			Blue

N/A: Not Applicable

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