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Mounting and Wiring

Pinout

Pin Definition Remarks
1 2 USBUS USBUS S-Bus The power supply USBUS is powered by the coupler and by the power supply Us of the EtherCAT coupler.
3 4 GND GND
5 6 RX0+ TX1+
7 8 RX0- TX1-
9 10 GND GND
11 12 TX0+ RX1+
13 14 TX0- RX1-
15 16 GND GND
17 18 AGND AI 1 Signal
19 20 AGND AI 2
21 22 AGND AI 3
23 24 AGND AI 4
25 26 AGND AI 5
27 28 AGND AI 6
29 30 AGND AI 7
31 32 AGND AI 8
33 34 NC NC UpThe device has no upper contacts and is powered solely via USBUS
35 36 NC NC
37 38 NC NC
39 40 SGND SGND

 


Pin Definition

Definition Description
USBUS S-Bus power supply 3.3V
GND S-Bus ground signal (Note: Never connect to 0V Up!)
RXn+ S-Bus receiving positive signal
RXn- S-Bus receiving negative signal
TXn+ S-Bus transmitting positive signal
TXn- S-Bus transmitting negative signal
AI 1~AI 8 Analog input 1...8
AGND Analog input grounding
NC Not Connected
SGND Shield layer grounding

 


PDO Parameter Description

Name Parameters Data type Description
Al Standard Channel 1~Al Standard Channel 8 Status Underrange Bit Data is below the measurement range
Overrange Bit Data is over the limit
Limit 1 2Bit

Limit monitoring:

0:not active

1:Value < limit value 1

2:Value > limit value 1

3:Value = limit value 1

Limit 2 2Bit

Limit monitoring:

0:not active

1:Value < limit value 1

2:Value > limit value 1

3:Value = limit value 1

Error Bit

0: No error

1: If data is invalid (over or below the measurement range)

TxPDO State Bit Reserved parameter
TxPDO Toggle Bit Reserved parameter
Value / INT Analog input address

 


COE Parameter Description

COE parameters 0x8000~0x8070 are used for parameter settings of the analog input module. The parameters marked with yellow “  ” are reserved and cannot be configured. Note: when n takes values from 0 to 7, it corresponds to channels 1 to 8 respectively.

0x80n0 AI parameter settings
Index Name Meaning Symbol Default Value
80n0:01 Enable user scale Enable user scaling RW 0x00
80n0:02 Presentation Reserved parameter RW 0x00
80n0:05 Siemens bits Reserved parameter RW 0x00
80n0:06 Enable filter Enable filter. When the filter is enabled, noise can be filtered out without requiring synchronizing data exchange with the PLC cycle. RW 0x01
80n0:07 Enable limit 1 Limit 1 is enabled RW 0x00
80n0:08 Enable limit 2 Limit 2 is enabled RW 0x00
80n0:0A Enable user calibration Reserved parameter RW 0x00
80n0:0B Enable vendor calibration Reserved parameter RW 0x01
80n0:0E Swap limit bits Reserved parameter RW 0x00
80n0:11 User scale offset User scaling offset RW 0x0000
80n0:12 User scale gain User scaling gain.The gain is expressed in fixed-point format with a factor of 216.Value 1 corresponds to 6553510 (0x00010000hex).And it is limited to the range of +/−0x7FFFF. RW 0x00010000
80n0:13 Limit 1 Used to set the first limit value for status bits (valid when the index 80n0:07 is enabled) RW 0x0000
80n0:14 Limit 2 Used to set the second limit value for status bits (valid when the index 80n0:08 is enabled) RW 0x0000
80n0:15 Filter settings Filter activation when enabled via Enable filter (index 80n0:06).Possible settings are numbered sequentially.0:50 Hz FIR1:60 Hz FIR RW 0x0000
80n0:17 User calibration offset Reserved parameter RW 0x0000
80n0:18 User calibration gain Reserved parameter RW 0x4000

 

 

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SC3274 | 4 Channel RTD Measurement Module
Last modified: 2026-03-25