TECHTOP TD350 - Page 36

TD350 Series VFD Installation guidelines
-31-
Terminal
name
Instruction
 Input impedance: 20kΩ during voltage input; 250Ω during current input;
 AI1 voltage or current input is set by P05.50;
 Resolution ratio: When 10V corresponds to 50Hz, the min. resolution ratio is
5mV;
 25°C, When input above 5V or 10mA, the error is ±0.5%
GND
+10.5V reference zero potential
AO1
 Output range: 0–10V voltage or 0–20mA current
 Voltage or current output is set by toggle switch SW2;
 25°C , when input above 5V or 10mA, the error is ±0.5%.
RO1A
RO1 relay output; RO1A is NO, RO1B is NC, RO1C is common port
Contact capacity: 3A/AC250V, 1A/DC30V
RO1B
RO1C
RO2A
RO2 relay output; RO2A is NO, RO2B is NC, RO2C is common port
Contact capacity: 3A/AC250V, 1A/DC30V
RO2B
RO2C
HDO
 Switch capacity: 200mA/30V;
 Range of output frequency: 0–50kHz
 Duty ratio: 50%
COM
Common port of +24V
CME
Common port of open collector output; short connected to COM by default
Y1
1. Switch capacity: 200mA/30V;
2. Range of output frequency: 0–1kHz
485+
485 communication port, 485 differential signal port and standard 485
communication interface should use twisted shielded pair; the 120ohm terminal
matching resistor of 485 communication is connected by toggle switch SW3.
485-
PE
Grounding terminal
PW
Provide input digital working power from external to internal;
Voltage range: 12–24V
24V
The VFD provides user power; the maximum output current is 200mA
S1
Digital input 1
 Internal impedance: 3.3kΩ
 Accept 12–30V voltage input
 This terminal is bi-directional input terminal and supports
NPN/PNP connection modes
 Max. input frequency: 1kHz
 All are programmable digital input terminals, users can set the
terminal function via function codes
S2
Digital input 2
S3
Digital input 3
S4
Digital input 4
HDIA
Besides S1–S4 functions, it can also act as high frequency pulse input channel
Max. input frequency: 50kHz;
HDIB