Hitachi L100-MFR2 Reference Guide

Application Note:

Driving a Solid-State Relay

With the L100-MFR2 Series

Please refer also to the

Inverter Instruction Manual

AN030404-1

Hitachi America, Ltd.

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Application Note: L100-MFR2 Series Inverter – Driving a Solid-State Relay with the Inverter Intelligent Outputs

Sometimes it may be necessary to drive a relay to activate certain external devices such as electromechanical brakes or clutches. Typically electromechanical relays have a 24VDC coil voltage. In the case of the L100-MFR2 Series of Inverters, such voltage is NOT available on any of the inverter terminals. However 10 VDC is supplied by the L100-MFR2 at the [H] terminals, and can be used to drive a small solid-state relay instead. Such relays are typically capable of being driven by 5 – 32 V dc, or some similar range, and can switch a variety of AC or DC voltage levels.

By using a circuit similar to that in the diagram below, you may drive a solid-state relay, using the drive’s internal 10 Vdc supply. Terminals [H], [L], [CM2] and [12] of the L100 MFR2 Series Inverters are being utilized.

Figure 1 – Typical Setup

Hitachi Inverter

L100-MFR2

Omron Electronics
Model# G3NA-205B DC-24
was used for this test	H
	H

L		Pos +	L
		Pos +	L
	24-330V AC	Solid-State 4-32V DC	Jumper
		Relay
N	LOAD	Neg -	CM2
N	LOAD
			12

Note: Any solid-state relay capable of accepting a 10 VDC input should work.

Hitachi America, Ltd.

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