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Description:
The fail-safe analog input module 10102/2/1 is equipped with four 0-2 V analog input channels. These analog inputs share a common 0 V connection but are galvanically isolated from the 24 Vdc and 5 Vdc supplies.
The analog inputs can be used actively, with each input having a separate 26 Vdc, > 20 mA short-circuit protected output, or passively, where the supply is directly connected to the transmitter.
The input stage of 10102/2/1 features a high input impedance, allowing the connection of two 10102/2/1 modules in parallel. However, each input requires an analog input converter module 10102/A/ (refer to the 10102/A/ data sheets).
Note: As the inputs require a 10102/A/ converter module, the 10102/2/1 module can only be used in combination with an I/O backplane in the rack.
The analog input module performs scans on the analog inputs, the 26 V output voltages, internal supply voltages, and a reference voltage generated by a D/A converter. This D/A converter generates various reference voltages used to comprehensively test the analog input module. The self-test includes a leakage test of the input filter, which could affect the accuracy of the analog input value.
Within the configured process safety time, the analog inputs are tested for:
- Absolute accuracy
- Correct conversion over the full range
- Crosstalk between inputs
- Output voltage of the 26 Vdc outputs
The 26 Vdc outputs are generated by the DC/DC converter and stabilized at 26 Vdc, making them independent of the incoming 24 Vdc supply.
Note: The maximum output current is at least 21 mA. If the transmitters require a higher supply current, the input channel must be used in passive mode (= external supply).
Analog Input Ranges for FSC:
Table 1 provides an overview of the analog input ranges for the FSC system and how the 10102/2/1 module can be used for each of these ranges.
Table 1: Overview of analog inputs for FSC
- 0(4)-20 mA Internal power: 10102/2/1 + 10102/A/1
- 0(4)-20 mA External power: 10102/2/1 + 10102/A/2
- 0(1)-5 V External power: 10102/2/1 + 10102/A/3
- 0(2)-10 V External power: 10102/2/1 + 10102/A/4
- Loop-monitored digital input: 10102/2/1 + 10102/A/5
Other analog input signals such as thermocouples, PT-100, etc., can only be used after conversion to one of the analog input ranges that the FSC system can handle.
Technical Data:
The 10102/2/1 module specifications include:
- General Type number: 10102/2/1 11301*
- Approvals: CE, TÜV, UL
- Software versions: ≥ 3.00
- Space requirements: 4 TE, 3 HE (= 4 HP, 3U)
Power:
- Power requirements: 5 Vdc 30 mA
- 24 Vdc 175 mA + 25 mA for each active input
Input:
- Number of input channels: 4
- Input specification (V): 0-2 Vdc
- Input resistance: > 100 kOhm
- Loop powering: 26 Vdc (±1 V for 0.2 mA < I < 20 mA), short-circuit protected
- Loop current limit: > 21 mA solid-state
- A/D converter: 12-bit
- Inaccuracy: ≤ 0.75%
- Absolute max. input signal: ± 5 Vdc
Key Coding: Refer to the ‘Key Coding’ data sheet for details on key coding.
Module Connector Code:
- Holes A5, C17
Rack Connector Code:
- Large pins A5, C17
Notes: 10102/2/1 modules with suffix code 11301 have improved EMC behavior.
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