Connect Tech CTIM-00044 user manual Blue Heat/Net Synchronous Clocking, RS-422/V.11 Connections

Connect Tech Blue Heat/Net Sync User Manual

RS-422/V.11 Connections

The following are basic connections that can be accomplished when the I/O levels are in V.11 (RS-

422)mode. V.11 mode signaling can be enabled with EIA-530, RS-449 or X.21 modes on your Blue Heat/Net Sync.

Blue Heat/Net Sync		RS-422/V.11 Device
	2 - TX-		RX-
	14 - TX+		RX+
	16 - RX+		TX+
	3 - RX-		TX-
	7 - SR		SR
	Figure 5: Basic RS-422/V.11 Asynchronous Connections
Blue Heat/Net Sync		RS-422/V.11 Device
2	- TX-		RX-
14 - TX+			RX+
16 - RX+			TX+
3	- RX-		TX-
9	- R/TXC+		RXC
17 - R/TXC-			RXC
7	- SR		SR

Figure 6: Basic RS422/V.11 Synchronous Connections

NOTE: Blue Heat/Net Sync clock signals are bidirectional. The

Blue Heat/Net Sync can either source or receive a clock. See Blue

Heat/Net Sync Clocking for more details.

Blue Heat/Net Synchronous Clocking

The clocking circuits on the Blue Heat/Net Sync are very flexible. The Blue Heat/Net Sync DB-25 clock pins are bi-directional. This means that the TXC or RXC pins can be inputs receiving a clock or outputs driving a clock. Functionally the two pins are equal. For example, the following clocking combinations are possible:

RXC as clock input and TXC as clock input.

RXC as clock output and TXC as clock output.

RXC as clock input and TXC as clock output.

RXC as clock output and TXC as clock input.

The Blue Heat/Net Sync receivers and transmitters can be clocked independently from any combination of the above or from internal clock sources.

Clocking is also available from the EXT_REF_CLK input pin on the DB-9 female.

Revision 0.03 13