Rs-232C Interface - Sony LT 100 Gebrauchsanweisung

Power-on procedure
Electrical specifications

8-5. RS-232C Interface

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When the power is turned on, linked units communicate with each other to exchange
information such as the total number of units. Therefore, be sure to turn on the power
according to the following procedure.
Turn on all units at the same time.
- or -
Turn on the terminal units and then turn on the host unit.
Note
If the host unit is turned on first, the terminal units must be turned on within 3 seconds, or
the link connection will not be recognized and the terminal units will not operate.
Driver IC
Receiver IC
Maximum number of connected units : 4
Cable length
1. Signals (Conforming to EIA RS-232C)
Signals : Asynchronous, start-stop system, half-duplex system
Data transfer rate : 600, 1200, 2400, 4000, 9600, 19200 bps
Data length : Switchable between 7 or 8 bits
Parity : None, odd, or even selectable.
Stop bits : Switchable between 1 or 2 stop bits
Cable length : Max.15 m (49.2 ft)
• Switching of the various parameters is performed in the initial settings (P22).
• The above underlined items are the settings at the time of shipping.
2. Electrical Specifications
Driver side
Amplitude of output voltage : ±5 to 10 V
Output resistance
Output short-circuit current
Receiver side
Input resistance
Input allowable voltage
Input threshold
: Texas Instruments SN75ALS181 or equivalent
product (conforming to EIA RS-485)
: Texas Instruments SN75ALS181 or equivalent
product (conforming to EIA RS-485)
: MAX. 16 m (52.5 ft) between units,
MAX. 48 m (157 ft) overall
: Using MAXIM MAX202 or equivalent product
: 300 Ω or more
: ±10 mA
: Using MAXIM MAX202 or equivalent product
: 3 to 7 kΩ
: ±30 V
: Low 1.2 V, High 1.7 V