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Follow these steps to install the card (refer to Figure 3-1 below):
E1
Selects
Selects
IRQ3
IRQ4
COM2:
COM1:
E2
ON
OFF
RTS
ALWAYS
DRIVER ENABLE
= User
Configurable
Figure 3-1. Board layout of the PC↔422/485 Serial Interface.
1. Set DIP switch S1 on the card for your desired serial-port address (see
Table 3-1 on the next page). To select an address properly, CLOSE
(move toward the front of the card) the switch position corresponding
to the address and leave all other positions OPEN. If all eight switch
positions are OPEN, or if two or more positions are CLOSED, the port
will be disabled.
2. Set jumpers E1 and E2 to the settings you need:
E1 The PC
jumper that should be set prior to use. Consult the user manual
for the software being used to determine the proper setting. E1
selects the interrupt request for the port. A jumper at position 3 of
U19
422/485 Serial Interface has an interrupt selection
↔
C13
C14
E1
R1
X1
U5
R3
E2
C15
C10
C17
U13
U14
C9
C11
U21
U20
R4
C21
S1
CHAPTER 3: Installation
C19
U7
C22
U6
U9
C18
C20
U22
U23
J3
J2
11
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