B&B Electronics 232CC2A User Manual
Documentation Number 232CCxx4502
33
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445
When setting the address (via the dipswitch) use the silkscreen
on the printed circuit board. This silkscreen shows a “1” and a “0” --
referring to the “on and “off” states that each switch is set to. Switch
S1 configures port one (labeled J1) and, on two port cards, switch
S2 configures port two (labeled J2). Least significant bit (LSB) and
most significant bit (MSB) are labeled on the card. Table 1 shows
the numerical weight and electrical connection of each switch
position. Refer to Table 2 for COM Port addresses. Table 3 shows
frequently unused port addresses for applications when COM Port
addresses 1-4 are already used.
referring to the “on and “off” states that each switch is set to. Switch
S1 configures port one (labeled J1) and, on two port cards, switch
S2 configures port two (labeled J2). Least significant bit (LSB) and
most significant bit (MSB) are labeled on the card. Table 1 shows
the numerical weight and electrical connection of each switch
position. Refer to Table 2 for COM Port addresses. Table 3 shows
frequently unused port addresses for applications when COM Port
addresses 1-4 are already used.
To install the 232CC card as COM1, 2, 3, or 4, follow the switch
settings shown in Table 2. To install at another address, follow the
switch settings shown in Table 3.
switch settings shown in Table 3.
Table 2. Standard Port Addresses
Table 1. Address Switches
Switch Position
7
6
5
4
3
2
1
Bus Connection
SA9
SA8
SA7
SA6
SA5
SA4
SA3
Decimal Weight
512
256
128
64
32
16
8
Hex Weight
200
100
80
40
20
10
8
Base Hex
Address
Binary
Equivalent
Switch Settings
MSB
LSB
7654321
COM1
3F8
1111111000
1111111
COM2
2F8
1011111000
1011111
COM3
3E8
1111101000
1111101
COM4
2E8
1011101000
1011101