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J
S
UMPER
UMMARY
Jumper
Block
Description
V1[1-2]
COM1 Rx End-point Termination
In – 120 Ohm termination active
Out – No termination
Places terminating resistor across COM1 RS-485 TXRX+/TXRX- or
RS-422 RX+/RX- differential pair. Jumper must be out for RS-232
operation.
V1[3-4]
COM2 Rx End-point Termination
In – 120 Ohm termination active
Out – No termination
Places terminating resistor across COM2 RS-485 TXRX+/TXRX- or
RS-422 RX+/RX- differential pair. Jumper must be out for RS-232
operation.
V1[5-6]
COM3 Rx End-point Termination
In – 120 Ohm termination active
Out – No termination
Places terminating resistor across COM3 RS-485 TXRX+/TXRX- or
RS-422 RX+/RX- differential pair. Jumper must be out for RS-232
operation.
V1[7-8]
COM4 Rx End-point Termination
In – 120 Ohm termination active
Out – No termination
Places terminating resistor across COM4 RS-485 TXRX+/TXRX- or
RS-422 RX+/RX- differential pair. Jumper must be out for RS-232
operation.
V2[1-2-3]
RTC/CMOS Reset
[1-2] In – Normal operation
[2-3] In – RTC/CMOS reset
V3[1-2]
General Purpose Input Bit 1
In – Bit D1 of GPI register reads as 1
Out – Bit D1 of GPI register reads as 0
V3[3-4]
General Purpose Input Bit 2
In – Bit D0 of GPI register reads as 1
Out – Bit D0 of GPI register reads as 0
VL-EPM-24 Reference Manual
Table 3: Jumper Summary
Physical Details
As
Shipped
Page
Out
33
(Rev. 1.01
and later)
In
(Rev. 1.00)
Out
33
(Rev. 1.01
and later)
In
(Rev. 1.00)
In
33
In
33
[1-2] In
22
In
47
In
47
19
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