4
Control Inputs
Each control port can support either RS485 smart controls, or 1 analog switch, 1 analog potentiometer, and 1
logic output. The number of analog controls, and logic outputs can be dramatically increased by the use of an
RMPC I/O expander. RMPC expanders allow a 4, 8, or 12 fold expansion of the number of analog controls,
and logic outputs, and combine them into a smart control with a single CAT5E or better cable back to the MAP
device control port.
Switches
Switches inputs are internally ‘pulled up’ to +5VDC via 1kOhm resistor. No external voltage source is neces-
sary to create contact closure to ground. Switches are wired from pin 1 to pin 7 or pin 8 of the RJ45 connector.
1
2
3
4
5
6
7
8
RJ45 JACK
TIA/EIA 568B STANDARD
Switch
Potentiometers
Potentiometers are wired with ref10V on pin 3, a wiper on pin 2, and a ground on pin 7, or pin 8. High
performance pots with track resistance between 10kOhms and 100kOhms are recommended.
1
2
3
4
5
6
7
8
RJ45 JACK
TIA/EIA 568B STANDARD
Ref
er
enc
e = 10V
W
iper
Gr
ound
