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15 ch. Digital in, Digital inputs for nominal 24 volt signals, P-NET via Light-Link, Programmable in COPP

Price:DKK 900.00DKK 1,300.00


  • Digital inputs for nominal 24 volt signals
  • Programmable in COPP
  • P-NET via Light-Link
  • Line Check
  • Advanced internal self testing
  • LED for power On and Error indication
  • Wide Power Supply range
  • Wide Temperature range
  • Low Power Consumption



PD 821 is a device in the M100 series with digital I/O channels. The device offers 15 channels as interface for various types of process signals, alarms, level detectors etc.

The 15 channels consist of:
15 digital inputs, whereof one channel can operate as fast digital input.

Digital inputs can be configured to perform Line Check.
The Line Check function can be used in relation to two-wire proximity switches. In case of error the hardware will report either ‘Line open’ or ‘Line short circuit’ respectively.

The device is programmable in COPP, which means that a part of, or complete automation application can be built and downloaded by the user. The program can make use of ready-made components to control and monitor any process or machine application, both locally in the device but also via the network interacting with other devices.

PD 821 can be used with the BM 104 base module.

The device can be fixed to the base module by means of a screw.



Technical Specification

Digital Inputs (referenced to -24 Vin)
Frequency: Max. 1 kHz @ 50 % duty cycle
Input On: Vin < 4.5 V, Off: Vin > 6.5 V
Hysteresis: Typ. 1V
Line check: (*
Line open voltage: >0.75 * Vin
Line short circuit voltage: < 2 V
Input pull down resistance: 6.8 kΩ
Input active pull up (configurable): 3 mA

Fast Mode Digital Input (referenced to -24 Vin) (*
Frequency: Max. 50 kHz @ 50 % duty cycle
Input voltage Off: 2.5 V + Hys/2
Input voltage On: 2.5 V – Hys/2
Hysteresis (Hys): Typ. 1.0 V

Power Specifications
Supply voltage nominal: 24 VDC
Supply voltage: 12-32 VDC
Typ. internal power consumption (@ 24 VDC): 0.5 W
Max. power consumption (@ 24 VDC): 3.5 W

Environmental Conditions
Operation temperature: -25 °C to +70 °C
Storage temperature: -40 °C to +85 °C
Relative humidity: < 95 % RH (non-cond.)
Protection class: IP40

(* Use shielded cable