CTI 2550-A, Installation And Operation Manual

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16 C T I 2550-A Installation and O peration G uide
NOTE:
Standard shipping configuration is all switches in the OFF position Unipolar 5VDC range.
NOTE:
The OFF position is selected by actuating the switch in the direction of the center
of the printed circuit board.
2.3.7 Configuring DIP Switches to Report Hardware Configuration
After all of the hardware configuration is complete DIP switches SW1 and SW2 must be used to report
the information to the microcomputer. Each channel utilizes two switches that are coded in BCD
(Binary Code Decimal) to report hardware configuration for that channel.
Channel N
MSB LSB
Switch 2 Switch 1 BCD Value Range Selected
OFF OFF 0 Unipolar 5VDC
OFF ON 1 Unipolar 10 VDC
ON OFF 2 Bipolar -5 to +5VDC
ON ON 3 Bipolar -10 to +10VDC
2.4 Inserting the Module into the I/O Base
Insert the module into the I/O base by carefully pushing the module into the slot. When the module is
fully seated in the slot and backplane connector, tighten the captive screws at the top and bottom to
hold the module in place. To remove the module from the I/O base, loosen the captive screws, then
remove the module from the I/O base. Be careful not to damage the edge card at the back of the module
when inserting or removing the module.
2.5 Wiring the Input Connectors
Input signals are accepted through a connector assembly located on the front of the module. The
connector assembly consists of a standard Siemens® front panel edge connector that mates with the
printed circuit board. Wiring is connected to the front connector via recessed screw terminals. The
screw terminals can accept wire sizes up to single stranded 14 gauge wire. The actual size wire used
depends on the external device providing the input signal. Consult the device manufacturer’s
recommendations for selecting the input wire size.