
IEI MiniMax 3 Installation/Programming Manual Section 2: Installation
2.5.1 Installing a Diode to Prevent Electrical Kickback from Lock – DC Locks Only
If your electric locking device does not come pre-installed with internal protection for electrical “kickback voltage” use the supplied
1N4004 diode for DC locks only. This “kickback voltage” could possibly damage the Max 3 control module and installing the diode
could help prevent this from happening. When installing the diode, connect it across the positive (V+) and negative (V-) of your
locking device. The diode is polarized, which means the cathode mark (silver band at one end) must be connected to the positive
connection as shown below. You must connect the diode as close as possible to the locking device for it to work properly.
2.5.2 Installing an MOV to Prevent Electrical Kickback from Lock – AC Locks Only
If your electric locking device does not come pre-installed with internal protection for electrical “kickback voltage” use the supplied
MOV for AC locks only. This “kickback voltage” could possibly damage the Max 3 control module and installing the MOV could
help prevent this from happening. When installing the MOV, connect it across the AC connection to your locking device. This device
is not polarized so it does not matter which direction you install it. You must connect the MOV as close as possible to the locking
device for it to work properly.
Document #: 6055672, Rev 1.0 D1c Page 13 of 48
Figure 6: Connecting Diode
Across Maglock
Figure 5: Connecting Diode Across Strike
Figure 7: Connecting MOV Across
Strike