Filter
Top Products
SWITCHERS
9
With this configuration, the master unit has ultimate
control over the slave unit.
7.4 CONTACT CLOSURE (ONE WIRE ANALOG)
CONTROL
The one-wire control is an alternative to a multi-
wire contact closure control. This control pin allows
you to select different channels based on the DC
voltage level on pin 7 of the 9 pin D connector.
Internally, pin 7 is pooled up to 5 volts by a 10k
resistor. Thus, by selecting the proper resistor
values connected to ground any channel can be
selected. Although the channel selection next to
the relay contact is latching and will maintain the
last relay selected channel, it is recommended that
momentary contact closures not be used. Typical
resistor values and wire connections are shown
below.
In some cases, it may be preferable to use a
seven-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:
9 pin “D”
Male
Description 9 pin “D”
Female
Input
7 1.2K 1 1
7 3.3K 2 2
7 6.8K 3 3
7 12K 4 4
7 22K 5 5
7 51K 6 6
7 0 short 7 NONE
5 Ground 9
The following voltages apply for selecting the
required channel:
Input number min. (V) nom. (V) max. (V)
1 0.35 0.55 0.75
2 1.07 1.27 1.47
3 1.80 2.00 2.20
4 2.52 2.72 2.92
5 3.25 3.45 3.65
6 3.97 4.17 4.37
These voltage levels can be set using analog
outputs from different control systems or spare
dimmer control outputs.
7.5 MANUAL LOOP CONTROL
Loop control is used when multiple units of the
MX2216RM are connected to form a single
switcher. When the input channel button is pressed
the loop control pin is internally grounded and the
MX2216RM 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.
MX2216RM LOOP MX2216RM LOOP
6 6
5 5
MX2216RM 9-pin “D” Loop
Figure 3
Figure 4