Carotron GTW-MB-MBTCP Manual de instrucciones - Página 6
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Description of Features
4.1 Hardware Settings
The following are hardware selectable settings. The jumpers are accessible by
squeezing the sides near the top and removing the enclosure bottom.
JUMPERS J1/J2 Biasing
On some RS485 networks, it is necessary to bias the bus for proper operation.
This biasing can be applied by jumpers J1 and J2. Biasing is typically not required
on RS422 networks. On 485 networks, typically only one device on the network
should provide the biasing.
JUMPERS J3 Echo
When J3 is set to OFF, the RS422/485 receiver is disabled during a serial
transmission. When set to ON, the receiver is always enabled. Refer to the table
below for typical jumper settings based on the serial operating mode.
TERMINATOR
It is recommended to install a terminating resistor at the beginning and end of the
RS422/485 network. Placing a jumper between terminals 4 & 5 includes a 120 ohm
terminating resistor across the units serial receiver.
4.2 LEDs
6
Mode
RS422 (4 wire)
RS485 (4 wire)
RS485 (2 wire)
Table 1: J3 Settings
Top LED
Solid Amber
Solid Green
Off
Table 2: Connection LED
Bottom LED
Blinking Amber
Half Duplex Activity
Blinking Green
Full Duplex Activity
Table 3: Activity LED
J3 Echo
ON
ON
OFF
State
10BASE-T
100BASE-T
No Connection
State