Light Engineered Displays MNS Series LEDARRAY INDOOR DISPLAY - Manual (Page 4)

INDOOR DISPLAY
LEDARRAY
MNS
SERIES
DRY CONTACTS TO RS-485 DATA INTERFACE
Model: MNS-ctrl - for LEDArray and MegaDot signs
4
The ALPHA Discrete Input Interface allows messages to be displayed on standard LEDArray electronic signs
by using simple on/off contacts to trigger messages that have been stored in a sign. The ALPHA Discrete Input
Interface is designed for low-voltage applications.
Messages to be displayed are stored in a sign using either:
• Infrared handheld remote control
• Adaptive software such as ALPHA Messaging software
CPU / Input Module — serves as an interface between the Input Modules and LEDArray signs.
Up to four Input modules can be used, depending on the Operating Mode used. The eight, dry
contact inputs of each Input Module can be configured to one of five possible Operating Modes:
— Mode Ø: Discrete Fixed
— Mode 1: Momentary Triggered
— Mode 2: Binary Coded Decimal (BCD)
— Mode 3: Binary
— Mode 4: Counter
Power Module*not shown* — supplies power to the CPU Module / Input Modules
These modules are installed in a 12”x12”x4” deep box with a hinged door and cam lock to prevent unauth-
orized access. The inputs to the modules are pre-wired to terminal blocks for easy installation. A pair of wires from
your dry contact(s) is all that is needed to activate the associated messages(s). The messages are pre-programed
but can easily be changed with a hand-held remote or laptop computer.
WH
BL
BR YL GN
OR BK RD
SHLD
SH.
POS.
NEG.
+ RS485 (Bla
ck)
– RS485 (Red)
Side View
CPU/Input Module
1 2
A B
Figure 1
(see component descriptions on other side)
C
CONNECTIONS TO NETWORK ADAPTER
• Red (-) Differential: Connect to YL (Yellow Terminal)
• Black (+) Differential: Connect to BK (Black Terminal)
• Drain Wire (Shield): Must be continuous throughout network.
NOTE: Only connect to RD (Red Terminal) if the sign
is a 4000, 7000 or 9000 series.
Rev. 2