Control Terminal Functions - Trane TR150 Service Manual

Frequency Converter Control

2.6 Control Terminal Functions

Table 2.2 describes the functions of the control terminals.
2 2
Many of these terminals have multiple functions
determined by parameter settings. See Illustration 2.1.
Terminal Function
number
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.
42, 45 Analog and digital outputs for indicating values
such as frequency, reference, current, and torque.
The analog signal is 0–20 mA, or 4–20 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 0–10 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 0–20 mA or 4–20 mA, analog
current input, Resistance=approx. 200 Ω. Used for
reference or feedback signals.
61 RS485 common.
68, 69 RS485 interface and serial communication.
Table 2.2 Terminal Functions
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