Saia-Burgess Controls AG
Bahnhofstrasse 18 I CH-3280 Murten I Schweiz
T +41 26 580 30 00 I F +41 26 580 34 99
www.sbc-support.com
Technical data S-Bus
Bus system
S-Bus
Transmission rate
4800-9600-19 200-38 400-57 600-115 200.
The transmission Baud rate is automatically detected
Transmission mode
Data
Bus length (max.)
1200 m (without repeater)
Response time:
Write: up to 60 ms
Read: up to 60 ms
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The communication is ready 30 s after the power on
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The use of energy meter in bus with intensive communication could reduce the performance of the bus
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Refresh time for the data is 5 s. For this reason one energy meter should be not polled faster as 5 s
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254 devices could be connected to the S-Bus. With more than 128 devices, a repeater should be used
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The interface don’t have a terminal resistor, this must be provided external
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For a description of the used registers please look at the register page
Data transmission
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Only «read/write» register instructions are recognized
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Only one register can be written at the same time
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The device will respond «NAK» if more than 1 register is written
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Up to 10 Registers could be read at the same time
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The device will respond «NAK» if more than 10 registers are read
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The device will not respond to any unknown query
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The device has a voltage monitoring system. In case of voltage drop,
registers are stored in EEPROM (transmission rate) etc.
Changing the S-Bus direct on device
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In the menu, go for «U»
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Push long (≥ 2 s)
➞
«SBUS-ADR»
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Push short
➞
S-Bus a1, push long
➞
S-Bus a10
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If the desired address is reached, wait until the main display appears again.
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