Specifications

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NOTICE

Note the values available within the different standard

groups of resistors:

E12: Closest standard value is 470 Ω, creating an input of

449.9 Ω and 8.997 V.

E24: Closest standard value is 510 Ω, creating an input of

486.4Ω and 9.728 V.

E48: Closest standard value is 511 Ω, creating an input of

487.3 Ω and 9.746 V.

E96: Closest standard value is 523 Ω, creating an input of

498.2 Ω and 9.964 V.

Analog inputs - terminal X42/1-6

Parameter group: 18-3*. See also VLT

HVAC Drive

Programming Guide.

Parameter groups for set-up: 26-0*, 26-1*, 26-2* and 26-3*.

See also VLT

HVAC Drive Programming Guide.

3 x Analog

inputs

Used as temperature

sensor input

Used as voltage input

Operating range

-50 to +150 °C 0 - 10 V DC

Resolution

11 bits 10 bits

Accuracy

-50 °C

±1 Kelvin

+150 °C

±2 Kelvin

0.2% of full

scale at cal.

temperature

Sampling

3 Hz 2.4 Hz

Max load

- ± 20 V continuously

Impedance

Approximately 5 kΩ

Table 3.8 Analog inputs - terminal X42/1-6

When used for voltage, analog inputs are scalable by

parameters for each input.

When used for temperature sensor, analog inputs scaling is

preset to necessary signal level for specified temperature

span.

When analog inputs are used for temperature sensors, it is

possible to read out feedback value in both °C and °F.

When operating with temperature sensors, maximum cable

length to connect sensors is 80 m non-screened/non-

twisted wires.

Analog outputs - terminal X42/7-12

Parameter group: 18-3*. See also VLT

HVAC Drive

Programming Guide.

Parameter groups for set-up: 26-4*, 26-5* and 26-6*. See

also VLT

HVAC Drive Programming Guide.

3 x Analog

outputs

Output

signal level

Resolution Linearity Max load

Volt 0-10 V DC 11 bits 1% of full

scale

1 mA

Table 3.9 Analog outputs - terminal X42/7-12

Analog outputs are scalable by parameters for each

output.

The function assigned is selectable via a parameter and

have same options as for analog outputs on control card.

For a more detailed description of parameters, refer to the

VLT

HVAC Drive Programming Guide.

Real-time clock (RTC) with back-up

The data format of RTC includes year, month, date, hour,

minutes and weekday.

Accuracy of clock is better than ± 20 ppm at 25 °C.

The built-in lithium back-up battery lasts on average for

minimum 10 years, when frequency converter is operating

at 40 °C ambient temperature. If battery pack back-up fails,

analog I/O option must be exchanged.

3.1.10

PTC Thermistor Card MCB 112

The MCB 112 option makes it possible to monitor the

temperature of an electrical motor through a galvanically

isolated PTC thermistor input. It is a B option for frequency

converter with Safe Torque Off.

For information on mounting and installation of the

option, see chapter 3.1.1 Mounting of Option Modules in Slot

B. See also chapter 7 Application Examples for different

application possibilities.

X44/1 and X44/2 are the thermistor inputs. X44/12 enables

Safe Torque Off of the frequency converter (T-37), if the

thermistor values make it necessary, and X44/10 informs

the frequency converter that a request for safe torque off

came from the MCB 112 to ensure a suitable alarm

handling. One of the digital inputs parameters (or a digital

input of a mounted option) must be set to [80] PTC Card 1

to use the information from X44/10. Configure

5-19 Terminal 37 Safe Stop to the desired Safe Torque Off

functionality (default is Safe Stop Alarm).

Selection

Design Guide