Echo 8870 Step, Protocol Adapter Pin-Outs, Distribution Panel, RS-485 CONNECTIONS, Wire Color

Step 8

CONNECT PROTOCOL ADAPTER TO THE DISTRIBUTION PANEL AND HOST COMPUTER OR AUTOMATION SYSTEM

1.MAKE SURE THAT ALL SWITCHES IN THE DISTRIBUTION PANEL ARE OFF!

2.Use Category-5 wire to connect the main communication terminals on the Distribution Panel with the “Flying Leads” of the protocol adapter (see DIAGRAM 6).

3.Connect the RS-232 port of the protocol adapter to the computer or automation system. A 6 ft. flat cable with RJ-11 connectors, and an RJ-11 to DB9 transition connector are provided with the protocol adapter.

Some computers use 25-pin connectors on serial ports, which requires a DB25 connector. A DB9 connector fits a 9-pin port. DB9 to DB25 transitions are available at most computer retail stores.

4.Power up the Protocol Adapter with the plug-in transformer provided. The “Power” LED on the Protocol Adapter along with the “Enable” LEDs should light up when power is applied.

DIAGRAM 6 – Protocol Adapter Wiring

7.5VAC

Transformer provided w/ protocol adapter

POWER RX TX		RX TX RX TX
	DATA	ENABLE	DATA
	RS-485 RS-485 RS-232
Model 8811 Protocol Adapter
Power
7.5VAC	RS-485 RS-485			RS-232
		BLU/WHT		BLU/WHT
	ORG/WHT			BLU
	RED/WHT			ORG/WHT
	BLK/WHT			ORG
				CAT-5
				1 2 3 4 5 6

	RS-232 input
	to automation
Cable and DB9
	system or
connector provided
	connect to
with protocol
	computer com
adapter	port

PROTOCOL ADAPTER PIN-OUTS

RS-485 CONNECTIONS

				SIGNAL
		Rx+		Tx-	Tx+	Rx-
	WIRE COLOR	B+
FLYING LEADS	ORG/WHT
	RED/WHT			A-
	BLK/WHT				A+
	BLU/WHT					B-
11	1		NOT USED
	2	B+

		ORG ORG/WHT BLU BLU/WHT			CONNECTOR
					END VIEW
		A+ A- B+ B-	REF		A
					B
A+	A			A	A+
A-		ON OFF			A-
			OFF ON
B+	B				B+
				B
					-
B		ON OFF			B
-	PWR		OFF ON
					R
				PWR
		DISTRIBUTION PANEL

	RS-485RJ- CONNECTORS			3	A-
			4		A+
				5	B-
			6		NOT USED
				RS-232 CONNECTION
RS-232 RJ-11	CONNECTOR	1	- CTS: Clear to Send (Outgoing - pulled high)
		2	- RTS: Request to Send (Incoming - ignored)
		3	- SG: Signal Ground
		4	- RD: Receive Data (incoming)
		5	- TD: Transmit Data (outgoing)
		6	- TSR: Data-Set-Ready (outgoing - pulled high)

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