Instruction Manual

5
2.2.1 CONNECTOR TYPES REQUIRED
The Alarm Expander Board is designed to interface directly to the PB24 Board with
a 50 pin ribbon cable (optional...ANAFAZE P/N P2000). If the user wishes to
provide his own cable, use a 50 pin socket connector, Spectra-Strip 802-050-002 or
equivalent.
2.2.2 INTERFACE CHARACTERISTICS
The Alarm Expander interface circuitry is designed to interface to optical isolators to
avoid problems caused by noise in an industrial environment. The user should use
extreme care to avoid noise and ground loops if optical isolation is not used.
When I/O lines 00-15 are used as outputs (or in Alarm mode) they are active low and
have the capability of sinking up to 24 mA. This load should be connected to a
voltage not exceeding 5 VDC.
All inputs (lines 00-21) are also active low and source less than 1 mA when the input
is low. The input voltage must be greater than 0 VDC and less than 5 VDC. A true
input must be less than 0.8 VDC.
2.2.3 POWER REQUIREMENTS
The ANAFAZE 8-PID internal power supply can support the Alarm Expander and
up to 160 mA total current to support solid state relays. If the PB-24 Board is used,
the internal power supply will support all 16 outputs simultaneously. If any other
output interface is used, the user should be careful not to draw more than 160 mA
from the internal supply.
2.3 DATA DIRECTION JUMPERS
The AEX Board has four jumpers, one for each group of four lines that may be selected
as inputs or outputs. These must be configured to match the desired I/O configuration.
All four are factory installed in the default alarm mode in which all 4 groups (16 lines)
are outputs. To use a four-line group as inputs the associated jumper must be removed
(cut).
NOTE:
Physical jumpers on the board
MUST
be properly configured to match
software data direction initialization to prevent errors.