PS Engineering MB-10 Installation Manual - Manual (Page 6)

PS Engineering
MB10 Marker Beacon Receiver
Installation and Operator’s Manual
200-023-0001 Page 2-2 Rev. 9, Sept. 2013
2.4 Cable Harness Wiring
Referring to the appropriate Appendix, assemble a wiring harness as required for the installation. All
wires must be MIL-SPEC in accordance with current regulations. Two- and three-conductor shielded wire
must be used where indicated, and be MIL-C-27500 or equivalent specification. Proper stripping, shield-
ing and soldering technique must be used at all times. It is imperative that correct wire be used.
Refer to FAA Advisory Circular 43.13-2A for more information. Failure to use correct techniques may
result in improper operation, electrical noise or unit failure. Damage caused by improper installation will
void the PS Engineering warranty.
2.4.1 Power
The MB10-Series are compatible with both 14 and 28 Volt DC systems. A 0.5 Amp circuit breaker is re-
quired for all installations. Power and ground wires should be #22 connected to J10 Pin 1. Connect air-
frame ground to J10 Pin 9only. No dropping resistors are required.
2.4.2 Audio Panel interface
The MB10 is designed to interface with standard aircraft avionics, and presents a 510  receiver imped-
ance.
2.4.3 Lamp Dimming
The MB10 has manual dimming of the marker lamps, through the aircraft avionics dimmer. For 14 V
aircraft, connect J10 Pin 7 to the aircraft dimmer bus. For 28-volt systems, connect pin 8 to the aircraft
dimmer. If the dimmer input is not connected, or at zero VDC, the lamps will be on fully bright.
2.4.4 Marker Antenna Installation
A marker beacon antenna, appropriate to the type and speed of the aircraft, is required (not included).
Refer to aircraft and antenna manufacturer's installation instructions, as well as AC43.13-2A (or later
revision), Chapter 3, for information on proper antenna installation techniques. The marker beacon an-
tenna must be mounted on the bottom of the aircraft.
2.4.5 External Marker Lights
For installations that require external marker beacon lights, there are three outputs that can drive 12-Volt
lamps only. The external output lamps are driven high (typically +9 VDC 1.5 VDC unloaded, at MAX
brightness) when active. Maximum source current per lamp is 125 mA. Voltage varies with dimming
bus.
Note: if a constant maximum intensity is desired for the panel- or remote-mounted MB10, connect pin 7
(14V) or 8 (28V) to aircraft power.
The MB10 is also has active-low, open-collector marker outputs (inner, middle, outer) for interfacing with
other avionics systems that might require an active-low output. If required, a pull-up resistor may be
placed on the active-low outputs. It should be >1k Ω, and may be pulled up to any voltage below 32V DC.
Note: It is possible to use BOTH outputs at the same time. For example, driving remote indicator lamps
and an electronic display.
2.4.6 Remote Mode Selector- MB10R version only
The MB10R has provisions for remote mounting the Marker Mode selector (Hi-/Lo-Test/Mute). This must
be an On-Off-Momentary On switch. Connect Pin 15 to ground to place the unit in High Sense, and mo-
mentarily ground Pin 13 to mute the marker audio. Holding this pin low for 1-second will test the lamp
circuits.