StudioTech M46-00180 manual AC Mains Power, Function

is part number A1AXH-1036G-ND which is available from Digi-Key (www.digikey.com).

It’s important to ensure that the source of the remote control signals can meet the Model 46’s logic-state and timing re- quirements. The Model 46 recognizes an idle remote control input as one that has no current flowing through it. An active remote control input is one that has current flowing through it for a minimum of 30 milliseconds. A special case arises when the auto null button operating mode has been set to independent. This requires one front-panel button “tap” to auto null channel 1 and two button “taps” to auto null channel 2. The remote control equiva- lent for one “tap” is current flowing for a minimum of 30 milliseconds. The equiva- lent for two “taps” is current that flows

for 30 milliseconds, then a minimum no- current period of 30 milliseconds, followed by current flow for a minimum of 30 milli- seconds. The second period of current flow must come within one second of the start of the first.

Once the interconnect method and the source of the control signals have been selected, refer to Figure 4 for connection details. Ensure that the connected signals follow the specified polarity or damage to the opto-coupled inputs may occur.

Figure 4. Remote control input pin-out chart

It’s important that a competent techni- cian be available to perform the actual remote control input connection process. As expected, mating the interconnecting cable assembly with the Model 46’s 10- pin “header” requires removing the unit’s cover. As such, this must be done only after confirming that all sources of mains power have been disconnected from the unit.

AC Mains Power

The Model 46 operates directly from AC mains power of 100 to 240 V, 50/60 Hz. As a “universal mains input” device, there are no switches to set or jumpers to install. A 3-pin IEC 320 C14-type inlet connector on the Model 46 mates with a detach- able mains cord set. For units shipped to North America and Japan a cord is sup- plied that has a North-American (NEMA 15L) standard plug on one end and an IEC 320 C13-type connector on the other. Units bound for other destinations require that the appropriate cord set be obtained. The wire colors in the mains cord should conform to the internationally recognized color code and should be terminated according to the following chart:

Figure 5. Detail of back panel showing AC mains power connector