SWITCHERS
values connected to ground any channel can be selected. Although the channel selection by the relay contact is latching and will maintain the last
Figure 3
In some cases it may be preferable to use a five conductor wire to control the switcher with contact closures. The RC5204CC adapter is available to accommodate this need. The pin outs for this adapter are as follows:
7.5 MANUAL LOOP CONTROL
Loop control is used when multiple units of the MX2214RM are connected together to form a single switcher. When the input channel button is pressed the loop control pin is internally grounded and the MX2214RM Switcher selects INPUT 4 as the default input.
In this configuration the loop control pin 6 on the 9 pin D connector is connected to the same pin on all switchers.
| Figure 4 | |
|
|
|
MX2214RM LOOP |
| MX2214RM LOOP |
6 |
| 6 |
9 pin “D” | Description |
Male |
|
|
|
7 | 1.2K |
7 | 3.3K |
7 | 6.8K |
7 | 12K |
7 | 0 short |
5Ground
The following voltages required channel:
Input number min. (V)
10.35
21.07
31.80
42.52
| 9 pin “D” |
| Input |
| Female |
|
|
|
|
|
|
| 1 | 1 | |
| 2 | 2 | |
| 3 | 3 | |
| 4 | 4 | |
| 7 |
| NONE |
| 9 |
|
|
apply for | selecting the | ||||
|
|
|
|
|
|
|
| nom. (V) |
|
| max. (V) |
|
|
|
|
| |
|
| 0.55 |
| 0.75 | |
|
| 1.27 |
| 1.47 | |
|
| 2.00 |
| 2.20 | |
|
| 2.72 |
| 2.92 | |
5 | 5 |
MX2214RM
The loop control pin has an internal 100k resistor to +5volts. This limits the number of switchers that can be looped to a maximum of 10 switchers, which can be daisy chained together using this method.
More specifically, the output of one switcher is connected to INPUT 4 of the next switcher. Once loop control is enabled these switchers will automatically switch video signals to the output of the second switcher through INPUT 4. Keep in mind that you are always going to have one less input than the total number of inputs available on all switchers. Figure 4 above is for a
These voltage levels can be set using analog outputs from different control systems or spare dimmer control outputs.
7.6 LOOP CONTROL WITH RS-232 COMMAND
When multiple MX2214RM units are connected together to get a single switcher and
9