Gender Benders - Telco Style and Data Style
Now that I've got my test probes made, I'm ready to do some testing of my LocoNet system - well, almost ready. Each one of my test probes has a male jack crimped onto the end. This is okay if we're testing something like a female throttle jack. However, if I'm testing the end of a cable with a male jack on the end, I need something that will connect the cable to be tested to the end of my test probes. This "something" is called a female-female "gender-bender". It looks like this:
This female-female "gender-bender" is also used by module railroad clubs to connect the LocoNet between modules. This next discussion might get a little hairy for some of you. However, don't fret. You don't need to understand all of what we're discussing.
Now, without trying to confuse the issue, there are two types of female-female gender benders. Both types look the same. But inside, the wires are connected differently. And you won't know what type you have until you try out the gender bender.
Telco Style Gender Benders
The first type is the "telco-style" gender bender. In this type of gender bender, Pin 1 on one side is connected to Pin 6 on the other side, Pin 2 is connected to Pin 5, Pin 3 is connected to Pin 4. If you plug your test leads into each side of the gender bender and connect the white wire to one side of your ohmeter and the other white wire to the other side of your ohmeter, nothing will happen.
However, if you connect the white wire on one side and the blue wire on the other side, your ohmeter will register. Huh? What happened!
Remember we said at the beginning of this discussion to make sure that the white wire gets connected to the white, the black to the black, etc, etc? In the middle of the gender-bender, the blue wire is connected to the white wire, the yellow wire is connected to the black wire, the green to the red, the black to the yellow, the white to the blue. The diagram below shows what happened.
If we have the telco-type of gender bender, when we do our testing, we have to remember that white on one side will register with blue on the other, yellow with black...... and white with blue.
Or, we can make a short 6" cable with two male plugs on the end, add another telco-type gender-bender, and we'll have our problem fixed. The diagram below shows this gender bender - 6"cable - gender bender setup. It may be a bit difficult to see how white on one side ends up with white on the other side, black with black,......., blue with blue. However, if you take your ohmeter and connect one lead to the blue wire at one end of your test leads and connect the other to the blue wire at the other end, you'll see the needle swing over - if you've properly crimped the two male plugs onto that 6" cable.
Data Type Gender Benders
The second type of female-female gender bender is the data-type. In this case, Pin 1 on one side is connected to Pin 1 on the other side through the white wire. Pin 2 on one side is connected to Pin 2 on the other side through the black wire. Pin 3 on one side is connected to Pin 3 on the other side through the red wire. Etc, Etc. The diagram below shows what happens. The wires cross over in the middle so that we maintain the pin orientation. If you plug your test leads into each side of the gender bender and connect the white wire to one side of your ohmeter and the other white wire to the other side of your ohmeter, the ohmeter will register.
|If we have the Data Type Gender Bender, we don't have to do anything.
So, the moral of the story is to get the data-type gender bender - if you
can. If you can't, simply make a short 6" cable and add an extra
telco-type gender bender.
For all of our testing, we're going to use the data-type gender bender. Now, let's move on to wiring a telco jack.