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DISCLAIMER: The pinouts shown here were contributed by manufacturers, vendors and individuals. While every effort has been made to insure accuracy, LaserFX.com can not be responsible for any errors or omissions.

Omnichrome 532 and American Laser 60X Umbilical Connector
Contributed by O. Steven Roberts

WARNING: DOES NOT APPLY TO NEC GLG3020, GLG3030 OR GLG3050 SERIES HEADS EVEN THOUGH THEY USE THE SAME CONNECTOR. CONNECTING AN NEC HEAD TO A OMNICHROME OR AMERICAN SUPPLY WILL RESULT IN PSU FAILURE

Connector type: The mating connector is AMP Part number 206612-1

Umbilical Connector Pinout

NOTES

A/ Thermal/fan interlock wires also run outside of the head, among with the two 110 VAC wires for the fan. Use an ohmmeter to locate the fan wires and interlock wires by measuring from the pins on the connector to each of the four wires. Cross-connecting a fan wire to an interlock wire will severely damage the Power supply.
It is highly recommended that the factory practice of using a 4 pin connector to the fan be followed, with the interlock wires jumpered together on the fan side of the connector. That way, the power supply will not start the laser unless the fan is properly attached.

B/ For those building or servicing Power Supplies, note that a 100K resistor inside the PSU must be with the pin marked boost via 100K. Failure to have this installed or reversing these two leads will result in ignitor failure and/or tube damage!

C/ The 60X/532 is an OEM laser and thus not all pins will be connected or in use. Having a pin 4 on the connector is a dead give-away that you have a supply that uses 220 VAC North American or 250 VAC 50 Hz European power. A system of this type will not run from North American 110 VAC power lines without a tap change or transformer change inside the PSU (it can be run form a stove/dryer connection that provides 220 VAC. If pin 7 is present, the unit has external ignition shut-off, consult your vendor or the factory.
NOTE: laser heads with a built-in hardwired umbilical permanently attached, use a different PSU and pin-out even though the connector is the same - consult the vendor/factory before use.
The Power supplies designed for North American use will be missing pins 4, 7 and 12. Omnichrome power supplies can be jumpered to use either the control pot on the head or on the PSU.

D/ While the Omnichrome 532 and American Laser 60X are designed to be interchangeable, there are some differences. Omnichrome heads are designed to operate in light control mode and will not have a current sense pin on the 22 pin connector. The AC power LED on the head is is powered by +15 Volts from the the light control care in the ALC 60X, but by -15 Volts in the Omnichrome laser heads.
Some of the common 'clone' power supplies (E.G.: those built be MWK) do not support the light control cards and thus not all jacks on the side of the head will work. On the MWK PSUs, the Current Jacks on the side of the head will still work, as will the overcurrent light, but the light jacks will not function as the light card is not used by the MWK supply.
Note that the over-current LED is a relative indicator of tube current and was designed for use in a photocopier. When the laser is used in light show applications at currents up to the 10 Amp tube limit, this is NOT a true over-current warning. On ALC built units, you must press the button on the side of the head for the jacks to function.

POWER CONNECTOR PINOUT FOR 7 PIN AC POWER CONNECTOR - AMERICAN/LANDMARK/MARLIN "GOLD BOX" or "XEROX" Power Supply

NOTE

On the Gold Box power connector, pins 1 and 6 go to the 110V AC HOT line (black wire) , Pins 7 and 2 go to the 110V AC neutral wire (white wire) , and pin 4 is safety ground (green wire) Other pins are unused.
Putting an optional on/off switch in series with pin 6 of the power connector will enable cool down of the laser after shutdown by those power supplies that have a fan shutdown timer. For Other PSUs this will just leave the fan and tube filament on when the unit is plugged in. The laser should have 2-3 minutes of fan cooling after shutdown, but no more, as this can lead to changes in the tube gas pressure and overstressed tube seals. For more details on fan installation, see the hobby pages Backstage for a fan mount to cool the 60X.

60C/60B Physical Differences, How to tell if you have a 60C/60B

There are two fans on the side instead of one fan on the top.
The umbilical is hardwired into the side of the head rather than using a connector.
There is no light potentiometer on the head. there is a neon emission light on the top.
The laser safety warnings are in German.
The hour meter is connected across the fan AC 
Lasers exported to Europe often use a 3 kW step-down transformer to run from the 250V 50 Hz power

Pinout Differences
Pins 2 and 5, neon light 110V AC - (normally head cover interlock switch on a 60X)
Pins 4 and 9 head interlock + chassis ground - (4 usually is not connected, 9 is normally one end of the light pot on a 60X )
Pins - 10 and 15 head fans for 110V 60C heads - ( 10 and 15 normally is the light pot on a 60X )
Pin - 12 Chassis Ground. (normally NC on a 60X)
Pins - 16 and 20, normally the fan on a 60X, are missing on a 60C

All other pins match the general 60X pinout.

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