1
Introduction
The ALPHA Discrete Input Interface allows messages to be displayed on standard ALPHA 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 (see “Creating messages using ALPHA
Messaging software” on page 23)
The ALPHA Discrete Input Interface consists of three types of modules which can be connected in any
order:
•
CPU Module — serves as an interface between the Input Modules and ALPHA signs
•
Input Module (up to four 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 (see
“Operating Modes” on page 9):
— Mode Ø: Discrete Fixed
— Mode 1: Momentary Triggered
— Mode 2: Binary Coded Decimal (BCD)
— Mode 3: Binary
— Mode 4: Counter
•
Power Module — supplies power to the CPU Module and Input Modules
ALPHA Discrete Input Interface
Operating Instructions
DIN rail
(If conductive, the rail
should be connected
to earth GND because
the rail serves as the
chassis GND for all
the modules.)
Power Module
CPU Module
Input Modules
(up to four, depending on Operating Mode
used. See “Operating Modes” on page 9.)
NOTE: Modules should be mounted in an appropriate NEMA enclosure to
ensure isolation from noise and protection from harsh environments.
PWR
L2
DISPLAY
SERIAL COM
L1
(RS 232/485)
(RS 232)
5V
I7
24V
I3
I6
I2
I5
I1
I4
I0
INPUT
STATUS
POWER
Int. Ext.
Sinking (NPN)
Sinking (NPN)
5V
I7
24V
I3
I6
I2
I5
I1
I4
I0
INPUT
STATUS
POWER
Int. Ext.
Sinking (NPN)
Sinking (NPN)
5V
I7
24V
I3
I6
I2
I5
I1
I4
I0
INPUT
STATUS
POWER
Int. Ext.
Sinking (NPN)
Sinking (NPN)
5V
I7
24V
I3
I6
I2
I5
I1
I4
I0
INPUT
STATUS
POWER
Int. Ext.
Sinking (NPN)
Sinking (NPN)
End clamp
Use end clamps to hold
the modules in place.
Revision date: 2/3/2000
© 2000 Adaptive Micro Systems
9711-Ø7Ø1A
The distinctive appearance of this product is a Trade Dress of Adaptive Micro Systems, Inc.
