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2.6 Control Terminal Functions

Table 2.2 describes the functions of the control terminals.

Many of these terminals have multiple functions

determined by parameter settings. See Illustration 2.1.

Terminal

No.

Function

01, 02, 03 Form C relay output on control card. Maximum

240 V AC, 2 A. Minimum 24 V DC, 10 mA or 24 V

AC, 100 mA. Can be used for indicating status and

warnings. Physically located on power card.

04, 05 Form A relay output on control card. 30 V AC, 42.5

V DC. Can be used for indicating status and

warnings.

12, 13 Voltage supply to digital inputs and external

transducers. For the 24 V DC to be used for digital

inputs, switch 4 on the control card must be

closed (ON position). The maximum output current

is 200 mA.

16 - 33 Programmable digital inputs for controlling the

frequency converter. R=2 kΩ. Less than 5 V=logic 0

(open). Greater than 10 V=logic 1 (closed).

20 Common for digital inputs.

39 Common for analog and digital outputs.

Terminal

No.

Function

42, 45 Analog and digital outputs for indicating values

such as frequency, reference, current and torque.

The analog signal is 0 to 20 mA, or 4 to 20 mA at

a maximum of 500 Ω. The digital signal is 24 V DC

at a minimum of 600 Ω.

50 10 V DC, 17 mA maximum analog supply voltage

for potentiometer or thermistor.

53, 54

0 to 10 V DC voltage input, R = 10 kΩ Used for

reference or feedback signals. A thermistor can be

connected here.

55 Common for analog inputs. This common is

isolated from the common of all other power

supplies. If, for example, the frequency converter’s

24 V DC power supply is used to power an

external transducer, which provides an analog

input signal, terminal 55 must be wired to terminal

39.

60 Programmable 0 to 20 mA or 4 to 20 mA, analog

current input, Resistance=approx. 200 Ω. Used for

reference or feedback signals.

61 RS-485 common.

68, 69 RS-485 interface and serial communication.

Table 2.2 Terminal Functions

Frequency Converter Control

VLT

HVAC Basic Drive Service Manual

20 MG90X202 - VLT

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