11
12
5. Connect the other pair of wires to RCV+ and RCV- (receive
positive and negative) on both of the terminal blocks, again making
careful note of which color is positive, and which is negative.
Ultimately, you will want to construct a two pair cross over cable
that makes a connection with the RS-422/485 device, as shown below.
Models 2086M/2086F
RS-422/-485 Device
SIGNAL
TERMINAL BLOCK
SIGNAL
XMT+
TB (5) RCV+
XMT-
TB (4) RCV-
RCV+
TB (1) XMT+
RCV-
TB (2) XMT-
4.4.1 2-Wire Connection Using Terminal Blocks
Most RS-485 devices employ a two-wire, half duplex configuration.
When using this configuration, be sure to first set the Models
2086M/2086F to half duplex mode by switching DIP switches and
jumpers (refer to section 3.0 for this configuration)—then use
only the
transmit (XMT) pair as shown below
Model 2086M/2086F
RS-485 Device
XMT+ .......................... +
XMT- ............................ -
4.5 OPERATING THE MODEL 2086 SERIES
Once the Model 2086 Series is properly installed, it should operate
transparently—as if it were a standard cable connection. Operating
power is derived from the RS-232 data and control signals; there is no
“ON/OFF” switch.
Figure 4. Model 2086M/2086F, Terminal Block & Cable Routing
