Optelecom 9525A, Инструкция по установке и эксплуатации

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2.4 Set-Up Procedures
The Model 9525A has two dipswitches, marked TIMEOUTS and MODES, accessible via the rear panel.
Program each of these switches upon installation to satisfy your chosen network operational
requirements. Refer to the following paragraphs.
2.4.1 Modes of Operation
To select among the four operational modes as described in Section 2.2, set switch numbers 1 and 2
of the MODES dipswitch per Table 2.
Table 2 – Mode of Operation Select via the Modes Dipswitches
Switch # Mode of Operation
1 2
D D Master Fault Tolerant Mode
D U Master Daisy Chain Mode
U D Local Fault Tolerant Mode
U U Local Daisy Chain Mode
D (DOWN) = ON; U (UP) = OFF
TO USE THE REMOTE MASTER MODE SELECT INPUT, select the Local mode via the MODES dipswitch
(switch #1 UP). Introduction of a low logic level to the “M” input of the 5-position terminal block will
switch the unit to Master mode. A low logic level input may be accomplished either by connecting it to
the “G” (ground) terminal via a switch or by connecting a TTL output to the “M” input.
2.4.2 BERT Test Signal Enable
To enable the Bert Test Signal (See Section 3.3) for the TX1 output port, set the MODES dipswitch
position #3 in the DOWN position. To enable the Bert Test Signal (see Section 3.3) for the TX2 output
port, set the MODES dipswitch position #4 in
the DOWN position. For normal operation, both switches must be in the UP, or OFF position.
2.4.3 Data Interface and Echo Cancel
Configure the unit for RS232, RS422, RS485 four-wire or RS485 two-wire operation by setting switch
numbers 5 through 10 of the MODES dipswitch per Table 3.
Table 3 – Data Interface Selection via the MODES Dipswitch
Switch Number Data Interface
5 6 7 8 9 10
U U OPT U U U RS232
D U OPT U U D RS422
D D OPT U U OPT RS485 4-Wire
D D D D D OPT RS485 2-Wire
U (UP) = OFF; D (DOWN) = ON; OPT (OPTIONAL)