Summary for Four Channel Temperature Indicator AI-704M

AI-702M, AI-704M and AI-706M multi-channel indicators provide 1-2, 1-4, 1-6 channels of independent process indications, and are ideal for the measurement, indication, alarm, calculation and retransmission of temperature, pressure, flow, level and humidity etc.

Main Features for 4 Channel Temperature Indicator AI-704M Support Alarm, Transmission, Communication

• Programmable and modular inputs. Multiple input types of thermocouples and RTDs, voltage/current inputs and two-wire transmitters are field- selectable.
• Each channel can have independent input specification. All channels are equipped with digital adjustment and filtering functions and each channel have individual digital adjustment and filtering parameters.
• Customized channel number for easy reading when measuring more than 6 channels, e.g. instrument 1 shows CH1 ~ CH6 while instrument 2 shows CH7 ~ CH12.
• High performance hardware design, greatly reduce the temperature drift and the interference between channels, thus multi-channel measurement accuracy is 0.2% full scale, the same as that of single channel.
• Provide high accuracy compensation function such as ice-point compensation, copper resistance compensation and thermostat compensation to thermocouple inputs.
• Build-in accurate internal calculation functions including square root extraction, summation, subtraction and multiplication.
• Support up to 2 isolated retransmission output. Any input channel can be retransmitted to OUTP port or all channels are cyclically retransmitted.
• Provide manual/auto pilot display, with 2 pilot speed selectable.
  Support up to 7 on-off signal inputs/outputs which can work as alarm output or on-off signal I/O for host computer.
• Each input channel has independent low/high limit alarm which can be assigned to any alarm output.
• Advanced communication function. Provide high accuracy and stability multi-channel analog data sampling function to host computer. The host computer can also input up to 7 channel on-off signal or execute on-off operation via the indicator.
• Up to12 customized field parameters.
• Multiple dimensions are selectable. 100~240VAC universal power supply.
• Achieved ISO9001 and CE certificates, comply with EMC standard, high reliability and stability. The power and I/O terminals have passed the anti-interference test of 4KV/5KHz burst of pulses.

Technical Specifications for Four Channel Temperature Indicator AI-704M

1. Input:

Thermocouples: (with J1 module): K, S, R, E, J, T, B, N and WRe5-WRe26

Two-wire RTDs: (with J2 module that supports 2 inputs): PT100, Cu50, 0~80 ohm, 0~400 ohm

Three-wire RTDs: (with J0 module that supports 1 inputs): PT100, Cu50, 0~80 ohm, 0~400 ohm

Linear mV voltages: (with J1 module) 0~20mV, 0~60mV, 0~100mV, 0~1V

Linear voltage: (with J3 module) 0~1V, 0~3V, 0~5V, 1~5V etc.

Linear current: (with J4 module) 0~12mA, 0~20mA, 4~20mA etc.

Square root extraction calculation input: (with J3 voltage or J4 current input module) 1~5V, 4~20mA etc.

Two-wire transmitter inputs: (with J5 module that provides 24VDC power supply) Connect to 4~20mA two wires transmitter

2. Maximum lead wire resistance for RTD input:

2-wire type RTDs:

2 ohm for Pt100 or 0~400 ohm input ;1 ohm for Cu50 and 0-200 ohm input;

3-wire type RTDs:

5 ohm

3. Measurement range:

K(0~1300℃), S(0~1700℃), R(0~1700℃), T(-200~+350℃), E(0~1000℃), J(0~1200℃), B(0~1800℃), N(0~1300℃), WRe5-WRe26(0~2300℃),

Pt100(-200~+800℃), Cu50(-50~+150℃)

Linear input:-1999~+9999 set by user

4. Measurement accuracy: ±0.2%FS±1digit / ±0.3%FS±1digit (only for Cu50)

Note 1: For thermocouple inputs with internal cold junction compensation, 1℃ CJC error should be taken into consideration. For those with Cu resistor, ice point or thermostat bath compensation, the accuracy is as above.
Note 2: Accuracy is not guaranteed between 0 and 600℃ for type B thermocouple input.

5. Temperature drift: ≤0.01%FS/℃ (typical 50ppm/℃)

6. Electromagnetic compatibility: IEC61000-4-4, ±4KV/5KHz; IEC61000-4-5, 4KV

7. Isolation withstanding voltage: Between power, relay contact and signal terminals ≥ 2300VDC; Between isolated eletroweak signal terminals ≥ 600VDC

8. Response time: ≤1.5 seconds(if digital filter parameter is set as 0 or 1)

9. Automatic pilot time interval: Approx. 1.2s or 2s configurable

10. Alarm function: High and low alarm, configurable separately for each channel

11. Alarm output: 

Relay contact output(NO or NC):250VAC/1A or 30VDC/1A

No contact discrete output(NO or NC):250VAC/0.3A(transient current 1A)

12. Power supply: 100~240VAC/50Hz, 24VDC

13. Power consumption: ≤6W

14. Work ambience: Temperature -10~+60℃, Humidity ≤ 90%RH

Terminal Layout and Wiring for 4 Channel Temperature Indicator AI-704M Alarm, Transmission, Communication

Ordering Code Definition for AI-704M

The ordering code of AI-702M/704M/706M series instrument is made up of 9 parts. For example:

                      AI-706M     A    J1   J2    J5    L5     L5    S   -   24VDC
                                  1            2     3     4      5      6        7     8           9

Above code symbols a AI-706M instrument with: front panel dimension 96*96mm, 2 thermocouple inputs, 2 two-wire RTD inputs, 2 current inputs, 4 alarm relay outputs, RS485 communication interface and the supply power is 24VDC. The explanation for each code is below:

Part 1 Model of the instrument

AI-702M/704M/706M respectively indicate 2, 4, 6 channels indicator.

Part 2  Dimension

The depth of the instrument is about 13.2mm(foreside)+100mm(rearward).

Part 3~8 Shows the module type installed on sockets

N: No module installed
J0: 1 channel three-wire RTD, thermocouple or mV voltage input
J1: 2 channel two-wire thermocouple or mV voltage inputs
J2: 2 channel two-wire RTD inputs
J3: 2 channel voltage inputs of 0-1V, 0-3V, 0-5V or 1-5V etc.
J4: 2 channel current inputs of 0-12mA, 4-20mA, 0-20mA etc.
J5: 2 channel two-wire transmitter provided 24VDC power supply.
I5: 2 channel on-off signal inputs, drycontact
L1: Single relay contact (NO+NC) output. (30VDC/2A, 264VAC/2A)
L2: Single relay contact (NO+NC) output. (30VDC/1A, 264VAC/1A)
L4: Single relay contact (NO+NC) output. (30VDC/2A, 264VAC/2A)
L5: Dual relay contact (NO) outputs. (30VDC/2A, 264VAC/2A)
W1: 1 channel thyristor normal open output. (“Burnt proof” technology, able to stand 0.3A continuous current or 1A transient current)
G: 1 SSR voltage output (12VDC/30mA)
G5: 2 SSR voltage outputs (12VDC/30mA)
S: Photoelectric isolated RS485 interface
S4: Photoelectric isolated RS485 interface with isolated power supply.
X3: Photoelectric isolated linear current output
X5: Photoelectric isolated linear current output with its own isolated power supply.
V5: Photoelectric isolated 5VDC/50mA power supply for transmitter.
V10: Photoelectric isolated 10VDC/50mA power supply for transmitter.
V12: Photoelectric isolated 12VDC/50mA power supply for transmitter.
V24: Photoelectric isolated 24VDC/50mA power supply for transmitter.

Part 9 Shows power suppl

Null indicates 100~240VAC power supply and "24VDC" indicates 20~32VDC/AC power.

Front Panel and Operation for AI-704M 4 Channel Indicator Alarm, Transmission, Communication

You will get:

A piece of temperature indicator;

A paper of user manual;

5-year warranty card and Quality Approval card;

A lable of units;

A pair of installaton brackets;

Nice package carton box with Yudian logo.

• Factory with 26 years experience.
• Two to ten years warranty time.
• Quick delivery ( within 3 working days).
• Retail/ Wholesale/ OEM/ ODM available.
• Better price for bulk order.
• We provide after sales service and technical assistance as customers requirement and needs.

If you are interested in our products or have any questions, please do not hesitate to contact us.