User`s manual

EM1500 User’s Manual www.rabbit.com 53
Figure 5.8 Modem Tab Configuration Parameters for SER3
The following table will clarify the different permutations of SER3 and SER4 and show how to achieve
them.
Table 5.2 Modem Tab Configuration Options for SER3 and SER4
SER3 uses
9-wire
control
1
SER4 is
internal
modem
1
RS232
levels
1
JP3
2
JP2
3
Comment
4
0 0 x A D
SER3 true 3-wire RS232
SER4 true 3-wire RS232
0 0 x B D
SER3 true 3-wire RS232
SER4 3-wire TTL
0 0 x A E
SER3 3-wire TTL
SER4 true 3-wire RS232
0 0 x B E
SER3 3-wire TTL
SER4 3-wire TTL
0 1 1 C D
SER3 5-wire RS232, true 3-wire
(RTS/CTS are 0-3V, Tx, Rx are +/-5V)
SER4 is internal modem
0 1 0 C E
SER3 5-wire TTL
SER4 is internal modem
1 0 1 A D
SER3 9-wire RS232, true 5-wire (DSR,
DTR, DCD, RI are 0-3V, Tx, Rx, RTS,
CTS are +/-5V)
SER4 not available
1 0 0 B E
SER3 9-wire TTL
SER4 not available