Danfoss PLUS+1 MC012-110, Техническая информация, Страница: 16 / 30

In open loop mode, current can be sourced or sunk (all modules are limited to 8 amps sinking), but the
output is a PWM duty cycle. Current feedback may be monitored in open loop mode, but the output is a
constant voltage, not a constant current. PVG valves may be driven with open loop PWM.
In closed loop mode, current is sourced and a constant current is maintained by the module’s operating
system using internal current feedback. Load impedance must not exceed 65 ohms.
In closed loop mode, the maximum current is limited by measuring the feedback current. There is no
thermal protection. If the maximum current is exceeded, the controller kernel will shut down the output
and latch it. The kernel also limits how quickly the output can be repowered (250 ms). The output cannot
be reset until the command goes to 0 or False (if configured as a digital output).
Proportional outputs that are used as a digital sinking output have a potential for a leakage current of up
to 5 mA when off.
PWM output are phase shifted to reduce input current ripple.
Refer to individual module data sheets for the maximum allowable output current for each PLUS+1 ®
module.
General
Description Comment
Configuration Sourcing or sinking
Type (Linear vs. PWM) PWM
Operating modes Programmable: closed loop current or open loop voltage (duty cycle)
Dual coil PCPs Compensated for induced currents in a non-driven coil (closed loop mode)
Short circuit to ground Output fully protected against damage and fault detected
Mode selection (current or voltage) and full scale current
ranges
Programmable
Do not connect a digital output to (back drive) without a series diode.
PLUS+1 ® PWM output circuits are not designed to be used as inputs. Output current feedback readings
should be used for fault checking only.
W
Warning
Unintended movement of the machine or mechanism may cause injury to the technician or bystanders.
The module will be powered up if battery voltage is applied to the module's output pin. To protect
against unintended movement, secure the machine.
C
Caution
Warranty will be voided if module is damaged.
Avoid significant current driven back through an output pin.
Specifications
Description Units Minimum Maximum Comment
Full scale proportional current
output mA 10 3000 The current may accidentally be
exceeded in open loop mode. If
the current exceeds the trip
point, the output will be
latched off.
Output voltage, 100% duty
cycle V 0 Vbatt-1
Output resolution of 3 A mA 0.25
Repeatability of full range % of full scale 0.5
Technical Information
PLUS+1® MC0XX-1XX Controller Family
Inputs/outputs types and specifications
16 | © Danfoss | April 2018 L1321895 | BC00000227en-US0401