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SMB Interface (Serial Measurement Bus, AFM1500 Only):
• AFR, FAR, Lambda, %O2, and Module Status Output
• Each Module can be assigned an address from 0h to Fh using a switch on the side
of the module
• Auto-detect feature for Device Identification
• 38400 baud, 1 Start Bit, 8 Data Bits, No parity
• For Communication Protocol, See SMB Interface Section
• SMB Ground and Power are Isolated (±200V max)
SMB/PC Cable Terminal Assignments (AFM1500 Only):
(Cable from PC to SMB/PC Port on AFM1500 Module, 6ft., P/N 1500A-16)
DB9 Female (to PC)
Terminal Number
SMB/PC Cable Terminal Assignments (AFM1500 Only):
(Cable from SMB/PWR to SMB/PC ports on AFM1500 Modules, 1ft., P/N 1500A-17)
DB9 Male (to Module)
Terminal Number
General Information
Power: 11 to 28 VDC at 5A (surge), 1.4A (continuous)
Fuse: Internal, automatically resetable
Dimensions: 4" x 3.5" x 1",
102mm x 89mm x 25mm (W x H x D)
Weight: 5.6 oz., 160 gm.
12
2 (Rx)
3 (Tx)
5 (Gnd)
1
2
6
3
7
8
4
5
9
DB9 Male (to Module)
Terminal Number
1
2
6
DB9 Male (to Module)
Terminal Number
2
1
6
3
7
8
4
5
9
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