Chapter 9 Expansion Module
228
Connect with electrical source
Input 24VDC
1
+
-
24V
2
①
-1A quick-blowing fuse, circuit-breaker or circuit protector.
②
-Surge absorber.
Communication set
The MBUS communication baud rate and format can be set by 8 switches (DIP), SW1.
Baud rate
SW1-1~SW1-3 set communication baud rate is 4.8K, 9.6K, 19.2K, 38.4K, 57.6K as shown below.
SW1-1
SW1-2
SW1-3
SW1-6
Baud rate (Kbps)
OFF OFF OFF
OFF
4.8
ON OFF OFF OFF
9.6
OFF ON OFF OFF
19.2
ON ON OFF OFF
38.4
* * ON OFF
57.6
* * * ON
38.4
※
* can be ON or OFF
Parity bit and stop bit
SW1-4~SW1-5, set stop bit and verifying bit
SW1-6, assembled setting
SW1-7~SW1-8, reserved
More information as shown below:
SW1-4 SW1-5 SW1-6 SW1-7 SW1-8
Stop bit, parity bit, assembled set
OFF
OFF
OFF
*
*
2 stop bits, no parity bit
OFF
ON
OFF
*
*
1 stop bit, no parity bit
ON
OFF
OFF
*
*
1 stop bit, 1 odd parity bit
ON
ON
OFF
*
*
1 stop bit, 1 even parity bit
* * ON * *
SW1-1~SW1-5 are inefficiency,
communication format is default as
38.4Kbps, 2 stop bits, no parity bit
※
* can be ON or OFF
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