Yudian AI Series Operating Instructions

2
● AI-7048 is fully compatible to AI-7028. AI-7028 is a 2 channel individual controller. The wire
connection method is taken reference to the first 2 channel of AI-7048.
2. Technical Specification
 Input type:
Thermocouple: K, S, R, E, J, T, B, N, WRe5-WRe26
Linear voltage: 0～20mV, 0～60mV, 0～100mV, 0～1V, etc.
 Instrument Input range
K(-50~+1300°C), S(-50~+1700 °C), R(-50~+1700°C), T(-200~+350°C), E(0~+800°C),
J(0~+1000°C), B(+200~+1800°C), N(0~+1300°C), WRe3-WRe25(0~+2300°C),
WRe5-WRe26(0～+2300°C), Pt100(-200~+800°C)
Linear mV Input: Range defined by SCH and SCL parameters.
 Measurement accuracy : ± 0.2%FS ± 0.1°C
Note 1: For thermocouple input with internal compensation, cold junction compensation error up to 1°C
should be considered.
Note 2: Type-B thermocouple can reach the stated measurement accuracy only at the range of 600～
1800°C.
 Temperature shift : ≤0.01%FS /°C (typical value is 60ppm/°C)
 Electromagnetic compatibility (EMC) : ±4KV/5KHz according to IEC61000-4-4;
4KV according to IEC61000-4-5.
 Isolation withstanding voltage : Between power, relay contact or signal terminal ≥2300VDC;
Between SSR voltage output and thermocouple input
≥600VDC
 Control period : 0.48 sec / 4 channels
 Output : SSR driving voltage, 12VDC/20mA each channel with short-circuit protection
 Power Supply: 100～240VAC/ 50Hz or 24VAC/DC +10%, -15%; 5VA.
 Operating Ambient: Temperature -10～60°C; humidity ≤90%RH
3. Rear Terminal Layout and Wiring
Wiring diagram of AI-7028/7048 multi-channel
temperature controller
COMM
OP3
COM
ALM
COMM
AL2
1
2
3
4
5
6
7
8
9
10
11
12
15
16
17
18
19
20
13
14
AL1
OP4
+
+
A
B
100-240VAC~
+
+
COM
COM
N/O
N/O
N/O
N/C
+
+
CJC
OP2
OP1
IN4
IN3
IN2
IN1
This wiring diagram is valid for panel size code A, C, E, E5
or etc.
For instruments with dimension B and F, the diagram is
clock-wisely rotated by 90°. The terminal numbers keep
unchanged.

Yudian AI Series Specifications

General

Control Mode	On/Off
Input Type	Thermocouple (K, S, T, E, J, B, N), RTD (Pt100, Cu50), Linear Current (4-20mA), Linear Voltage (0-5V, 1-5V)
Output Type	Relay, SSR, Linear Current (4-20mA)
Power Supply	AC 90-260V, 50/60Hz or DC 24V
Communication	RS485 Modbus RTU
Accuracy	±0.2%FS
Operating Temperature	0-50°C
Storage Temperature	-20-60°C
Humidity	85% RH (non-condensing)
Protection	IP65 (Front Panel)