Echo 8870 - Manual (Page 12)

10
ORG/WHT
BLU/WHT
RED/WHT
BLK/WHT
ORG/WHT
ORG BLU
BLU/WHT
ORG
BLU/WHT
CAT-5
ORG/WHT
BLU
PROTOCOL ADAPTER PIN-OUTS
RS-485 CONNECTIONS
WIRE COLOR
FL
YING
LEADS BLK/WHT
RED/WHT
ORG/WHT
BLU/WHT
SIGNAL
Rx+ Tx+ Rx- Tx-
RS-485
CONNECT
ORS
1
2
3
4
5
6
RS-232 CONNECT
OR
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)
RS-232 CONNECTION
B+
A-
A+
B-
B+
A-
A+
B-
NOT USED
NOT USED
7.5 VAC
Transformer
provided w/
protocol
adapter
Cable and DB9
connector provided
with protocol
adapter
RS-232 input
to automation
system or
connect to
computer com
port
RX TX
DATA
RS-232
RX TX
ENABLE
RS-485
RX TX
DATA
RS-485
POWER
Model 8811 Protocol Adapter
Power
7.5VAC RS-485 RS-485 RS-232
B+ B- REF A-
RC
A+
A-
B+
B-
A
B
A+
OFF ON
OFF ON
ON OFF
ON OFF
PWR
PWR
A
B
A
B
R
CA
+
A-
B+
B-
DISTRIBUTION PANEL
RJ-11
RJ-11
1 2 3 4 5 6
CONNECTOR
END VIEW
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.
CONNECT PROTOCOL ADAPTER TO THE DISTRIBUTION PANEL AND HOST COMPUTER
OR AUTOMATION SYSTEM
Step 8
DIAGRAM 6 – Protocol Adapter Wiring