FBs-CB2
1个RS232(Port2)之扩充通讯板
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FBs-CB22

2个RS232(Port1+Port2)之扩充通讯板
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FBs-CB5

1个RS485(Port2)之扩充通讯板
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FBs-CB55

2个RS485(Port1+Port2)之扩充通讯板
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FBs-CB25

1个RS232(Port1)+1个RS485(Port2)之扩充通讯板
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FBs-CBE

1个以太(Ethernet)网络界面(Port1)之扩充通讯板