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X20DI2377

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The B & R Automation X20DI2377 module, part of the X20 Series, features 2 digital inputs with 3-wire connections and can handle a nominal voltage of 24 VDC. It has configurable input filters between 0 and 25 ms, and the event counters can process square wave pulses at a maximum frequency of 50 kHz. The module supports both horizontal and vertical mounting orientations.

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Product Description:

The X20DI2377 is B&R Automation's unique digital input module designed primarily for the X20 product series. Originally, it was designed to function with the X20TB06, a 6-pin terminal block. For other applications, however, the 12-pin X20 terminal block, X20TB12, may also be used. Aside from the mentioned terminal blocks, the X20DI2377 is also compatible with X20's base modules. It serves primarily as an I/O module, providing two channels for digital inputs. Since digital input modules take in signals from other devices, the X20DI2377's channels are considered sink connections. Both digital inputs utilize 3-wire connections.

The nominal voltage for the X20DI2377's digital input channels is 24 VDC, with an allowable range deviation of +20% or -15%. The digital channels have two types of input filters: hardware and software. The hardware input filter has a relatively fixed response below 10 microseconds. The software input filter, on the other hand, has a configurable response time between 0 and 25 milliseconds over a 0.2 ms time interval. Both inputs can be configured as event counters, but only one input channel is configurable for GATE measurements. There are two switching thresholds for this digital input module. The low switching threshold is 5 volts DC, while the high switching threshold is 15 volts DC.

The X20DI2377's event counters use square wave signals, which only evaluate during the positive edge cycle. The maximum input frequency for the event counters is 50 kilohertz with a 16-bit counter size. On the other hand, only one digital input channel can be configured for gate measurement at any time. When operated, the gate measurement channel also uses a square wave pulse and evaluates at a positive-negative edge.

Connection type
3-wire
Digital inputs
2
Event counters
2; 16-bit; square wave; ≤50 kHz; rising edge
Gate measurements
1; 16-bit; square wave; 0.375–48 MHz; rise/fall
Input characteristics
EN 61131-2 Type 1
Input circuit
Sink
Input current @24 VDC
Typ. 10.5 mA
Input filter (software)
0–25 ms range, 0.2 ms step (default 0 ms)
Input voltage
24 VDC (–15%/+20%)
Mounting orientation
Horizontal & vertical
Operating humidity
5–95% RH non-condensing
Power consumption
Max 12 W
Protection class
IP20
Short-circuit proof
Yes
Storage temperature
-40 to 85 °C
Summation current
0.5 A
Switching thresholds
Low <5 VDC; High >15 VDC
Voltage drop (SCP)
Max 2 VDC @500 mA

Frequently Asked Questions about X20DI2377:

Q: What is the typical current for the X20DI2377's digital input channel?

A: Typically, the X20DI2377's digital channel draws 10.5 mA at the rated voltage (24 VDC).

Q: What is the maximum power consumption that the module can provide for the connected sensors?

A: The X20DI2377 may supply a maximum power of 12 W to all connected sensors, actuators, and other devices.

Q: What is the allowable pulse length for the X20DI2377's gate time measurement?

A: The pulse length for the X20DI2377's gate time measurement should be greater or equal to 20 microseconds.

Q: Is the X20DI2377's sensor power supply short-circuit proof?

A: Yes, the X20DI2377's sensor power supply is short circuit proof. In fact, the protection device for the sensor power supply has a terminal voltage of 2 volts at 500 mA.

Q: What is the input resistance for the X20DI2377's digital input channels?

A: The X20DI2377's digital input channels have an input resistance of 2.23 kilo ohms.


Internal Product Review

  • ‘‘The X20DI2377 is a potent digital input module that can perform special functions. Specifically, the X20DI2377's two digital inputs may both be used as event counters. At any point in time, however, only of these inputs can be configured for GATE measurements.’’

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