Msd 8961 High Current Relay, SPST Installation User Manual download pdf

MSD RELAYS

PN 8961, Single-Pole, Double-Throw, 30 Amp/12 VDC

PN 8960, Double-Pole, Double-Throw, 30 Amp/12 VDC

MSD Relays will allow you to activate a variety of accessories that require high current. These are

ideal to tie in with an rpm activated switch to control a nitrous or air shifter solenoid.

The beneﬁt of a relay is that it can be energized using a small amount of power (12V/1 Amp). This

moves the relay's armature so it can transfer a large amount of power (12V/30 Amp) to activate a

high current device.

• The PN 8960 will handle a 30 Amp load, on each side, with an input voltage of 12 volts.

• The PN 8961 Relay will handle a 30 Amp load and is ideal for multiple accessories.

Following is a short description of the operation of a relay. A variety of wiring schematics are also

included to help with your installation.

Relays are very simple devices and consist of four basic parts:

• A small coil (sometimes referred to as a bobbin or electromagnet)

• An armature

• A spring

• A set of electrical contacts

Relays consist of two separate and completely independent circuits; the Controller circuit and Switch

circuit. In Figure 1 the Controller circuit is on the bottom and it controls the power to the electromagnet.

When 12 volts are supplied through the switch, the coil is energized. When energized, it attracts the

armature of the Switch circut.

The Switch circuit consists of an armature, spring and contacts for the high current side. The armature

is a switch and will complete or open the high current circuit. When the coil of the relay is energized, it

attracts the armature from one electrical contact to another to complete the circuit. When the coil is not

energized the spring pulls (or pushes) the armature back and the high current circuit is opened.

Figure 1 General Relay.

M S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4

1 2 3 4

Summary of Contents

Page 1 - MSD RELAYS

MSD RELAYS PN 8961, Single-Pole, Double-Throw, 30 Amp/12 VDCPN 8960, Double-Pole, Double-Throw, 30 Amp/12 VDCMSD Relays will allow you to activate a v

Page 2 - RELAY APPLICATIONS

2 INSTALLATION INSTRUCTIONSM S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7

Page 3 - INSTALLATION INSTRUCTIONS 3

INSTALLATION INSTRUCTIONS 3M S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7

Page 4 - Limited Warranty

Figure 7 Connecting Multiple Nitrous Solenoids with PN 8960.Limited Warranty MSD warrants this product to be free from defects in material and workm

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Msd 8961 High Current Relay, SPST Installation User Manual

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