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– 6 – ACRCOMM and ACREXPAXIS User’s Guide
The following is a list of the jumper functions on the ACRCOMM module:
Jumper Description
J1 COM1 RS-422 Termination Resistor Select
(see Table 4, on page 6)
J2 COM1 RS-422 Termination Resistor Select
(see Table 4, on page 6)
J3 COM2 RS-422 Termination Resistor Select
(see Table 4, on page 6)
J4 COM2 RS-422 Termination Resistor Select
(see Table 4, on page 6)
J5 Not used with the ACR1505
J6 Not used with the ACR1505
J7 COM1 and COM2 Autobaud Detect Enable
(see Table 4, on page 6)
J8 Reserved
J9 Reserved
J10 Reserved
Table 3 ACRCOMM Jumper Functions
RS-422 Communication Ports Line Terminator Jumpers (J1
thru J4)
These jumpers provide termination resistors for the RS-422signals. For
jumper locations, see Figure 2 on page 5.
Factory Default........................................Jumpers in
Communication Ports Termination Jumpers
Signal Jumper Termination No Termination
RXD1A/RXD1B J1 Jumper In Jumper Out
TXD1A/TXD1B J2 Jumper In Jumper Out
RXD2A/RXD2B J3 Jumper In Jumper Out
TXD2A/TXD2B J4 Jumper In Jumper Out
Table 4 ACRCOMM RS-422 Termination Jumpers