Danfoss VLT HVAC, Инструкция по эксплуатации, Страница: 146 / 156

Pulse inputs:
Programmable pulse inputs
2
Terminal number pulse 29, 33
Max. frequency at terminal, 29, 33 110 kHz (push-pull driven)
Max. frequency at terminal, 29, 33 5 kHz (open collector)
Min. frequency at terminal 29, 33 4 Hz
Voltage level see section on Digital input
Maximum voltage on input 28 V DC
Input resistance, R
i
approx. 4 k Ω
Pulse input accuracy (0.1-1 kHz) Max. error: 0.1% of full scale
Analog output:
Number of programmable analog outputs
1
Terminal number 42
Current range at analog output 0/4 - 20 mA
Max. load to common at analog output 500 Ω
Accuracy on analog output Max. error: 0.8% of full scale
Resolution on analog output 8 bit
The analog output is galvanically isolated from the supply voltage (PELV) and other high-voltage
terminals.
Control card, RS-485 serial communication:
Terminal number
68 (P,TX+, RX+), 69 (N,TX-, RX-)
Terminal number 61 Common for terminals 68 and 69
The RS-485 serial communication circuit is functionally separated from other central circuits and
galvanically isolated from the supply voltage (PELV).
8. Specifications VLT ® HVAC Drive Instruction Manual
146
MG.11.A4.22 - VLT
®
is a registered Danfoss trademark
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