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MSP-070C Battery Maintainer

6

Connections & Controls

The Midtronics MSP-070C converts 120-240 volts nominal AC 

to a selectable (14.4 VDC, 13.6 VDC, or 13.2 VDC) voltage for use 

as a power supply. After the unit has detected the battery is 

fully charged and current is not being drawn from the vehicle, 

it will shut down the ouput to conserve energy and protect the 

vehicle.

Back View

Charging Cable Connections

Insert and rotate the charge cable 

quick connectors clockwise 180° to 

lock them onto the Quick Connector 

Locking Post.

CAN Bus Cable Connections

Circuit Breaker

Indicator LEDs

 Power 

 Charging 

 Error

Selectable Voltage Switches

Status

Master: Unit operates standalone and can  

control other slave units

Off: Not used

Slave: Unit is controlled by another device via  

CAN port. Output matches controlling unit

Voltage

14.4v

13.6v

13.2v

Cooling Vent

Side View

 

Cooling Fans

 

On/Off Switch

 

C14 Power Cable Plug-in

Locking Power Cord

Always use the red tabs on each side of the power cord connector to 

release/remove it from the charger’s power socket.

Pull Up To 

Release

1. Insert the control connector.
2. The connection process is complete when all three cables

are connected to the charger.

Connecting To A Battery

IMPORTANT:  When charging an AGM battery, do 

NOT use the 14.4v setting.

1. Identify battery terminal polarity (Negative: NEG, N /Posi-

tive: POS, P, or + ).

2. With the MSP unplugged, connect the positive clamp

(red) to the positive battery terminal and the negative

clamp (black) to the negative battery terminal.

3. Plug the power cord into a grounded 120-240 Vac outlet

and turn ON the power swtich.

Disconnecting From A Battery

1. Turn OFF the MSP power switch.
2. Unplug the MSP from the 120-240 Vac outlet.
3. Disconnect the positive (red) clamp from the positive bat-

tery terminal and the negative clamp (black) from the nega-

tive battery terminal.

Connections & Controls

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