Temperature monitoring unit for transformers, motors and electric generators. (23 pages)
Summary of Contents for TECSYSTEM NT511
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TECSYSTEM SHANGHAI INSTRUCTION MANUAL NT511 AD ANALOG & DIGITAL INSIDE TECSYSTEM SHANGHAI 3rd Floor, Block No.5,For- ward High-tech Industrial Park, No.33, Fuhua Road, Jiading District SHANGHAI - CHINA Tel:8621 39905855/56/57 http://www.tecsystem.asia R1.2 17/8/1 NT511 AD ANALOG & DIGITAL INSIDE...
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TECSYSTEM SHANGHAI INTRODUCTION NT511 is a microprocessor electronic device devoted to the transformer thermal monitoring, complete with ventilation system control and protection. The monitoring unit is designed to be directly mounted on the transformer box and it is equipped with a wide display to show and manage the temperatures, as well as the ventila- tion switching on and alarm thresholds.
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• Sensor diagnostic (Fcc-Foc) • Programming access through front key • Wrong programming display • Maximum temperatures reached by the channels, alarm storage and sensor fault. • Front key to reset the alarms NT511 AD ANALOG & DIGITAL INSIDE...
CH2 channel must always be referred to the transformer central column. CH4 channel must be referred either to the transformer core or to Pt100 room sensor, if you want to thermostat the transformer room using the NT511 monitoring unit. 6) MEASURING SIGNAL TRANSFER.
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TECSYSTEM SHANGHAI 7) CONNECTION WITH RS485 NETWORK NT511 can be connected with a data acquiring device (PC, PLC, SCADA) for remote con- trol. The used interface is RS485-type, which allows to connect 32 devices on the same line, and it is based on Modbus RTU protocol.
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TECSYSTEM SHANGHAI 11) COOLING FAN CONTROL (Figure 4 Page 21) NT511 Monitoring unit, if opportunely programmed, can control ON-OFF of fans accompanying the transformer, according to set temperatures. Fans on machine can be driven in two different ways: • Using the temperatures taken by the sensors on the three columns CHF 1.2.3...
If one of the LED’s should not work, you are kindly requested to return the monitoring unit to TECSYSTEM. 18) FRONT PANEL FIGURE 1 Display Allarms Message and tempera- Display mode selected Selected ture display channel channel Engine failure repor- Keyboard ting NT511 AD ANALOG & DIGITAL INSIDE...
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Select parity bit None (No), Even (EVE), Load desired parity bit Odd (ODD) PRG/SET Display shows 420 <> “datum” Programming 4.20 mA output 1-2-3-4; fixed channel Select desired 4.20 mA output SCA: scanning HOT: hottest channel NT511 AD ANALOG & DIGITAL INSIDE...
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Verify through T.MAX fuction possible defective Sudden trip of the main switch. Temperature is on sensors. standard levels. Just one channel has caused the Replace the sensor. Check the measuring signal trip. support terminal boards . NT511 AD ANALOG & DIGITAL INSIDE...
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When a channel is in Fault condition for FCD, relevant Alarm and trip signallings are inhibited in order to just report the anomaly for too fast increase of the temperature. Press Reset to cancel the FCD signalling of all the channels and restore the fault relay. NT511 AD ANALOG & DIGITAL INSIDE...
Please refer to the programming steps from 23 to 28 as shown on the table at page 8. The serial communication of the temperature control monitoring unit is active just when NT511 is in temperature control working mode in one of the intended modes (Scan, Auto, and T.Max).
, Starting address HI, Starting address LO, Number of Point HI, (10) Number of Point LO, Crc LO, Crc HI. Answer: Slave address, code 3 , Byte count, Data HI, Data LO……., Crc LO, Crc HI. (10) NT511 AD ANALOG & DIGITAL INSIDE...
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“timeout”. 31) NOTES FOR REMOTE PROGRAMMING In case you want to program a NT511 you have to bear in mind that Alarm settings of chan- nels 1-2-3 (register 00-17, 00-18, 00-19) must have the same values, since the monitoring unit handles them as channels with shared thresholds.
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Range 0-200° register Offset 20 (10) 20=0°C 21=1°C Temperature Holding 22=2°C register Temperature Holding register Holding Stato Ch1 register Holding Stato Ch2 register (See note 1) Holding Stato Ch3 register Holding Stato Ch4 register NT511 AD ANALOG & DIGITAL INSIDE...
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Holding Story Ch4 register Alarm Holding -point Ch1 register Alarm Holding Addresses -point Ch2 register from 21 to 28 constitute a sole writing Alarm Holding block -point Ch3 register Alarm Holding -point Ch4 register NT511 AD ANALOG & DIGITAL INSIDE...
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Fan-Off Holding -point Ch3 register Fan-Off Holding -point Ch4 register Holding General Flag (See note 4) register Holding “Free” Free register register Holding Hours for fan register test cycle Holding SET_FCD FCD setting register NT511 AD ANALOG & DIGITAL INSIDE...
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B4: shows that the programming data back-up in eeprom is under way B5: shows the presence of an error in the monitoring unit calibration B6: shows that the calibration error has been reset B7: shows that the fans have been manually set off NT511 AD ANALOG & DIGITAL INSIDE...
G (+) A -> A if NOT j=8 then goto 5 i +1 -> i 10) if NOT i = N then goto 3 11) A -> in CRC (result is in the order L,H) NT511 AD ANALOG & DIGITAL INSIDE...
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= (T/9.375)+4 (T=temperature in °C) For range 0 +200 relation is: = (T/12,5)+4 (T=temperature in °C) For range –40 +200 relation is: = (T/15)+6.7 (T=temperature in °C) Note: temperature range on request, standard set 0°C + 200 °C. NT511 AD ANALOG & DIGITAL INSIDE...
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TECSYSTEM SHANGHAI 38) DRAWING FOR MOUNTING FIGURE 2 100mm Cutout φ4 182mm Box unit rear dimensions: 180mm×230mm NT511 AD ANALOG & DIGITAL INSIDE...
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TECSYSTEM SHANGHAI 39) PT100 AND MODBUS ELECTRICAL CONNECTIONS FIGURE 3 4.20 mA output NT511 AD ANALOG & DIGITAL INSIDE...
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TECSYSTEM SHANGHAI 40) RELAY, FAN, SUPPLY ELECTRICAL CONNECTIONS FIGURE 4 NT511 AD ANALOG & DIGITAL INSIDE...
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The product warranty is two years from delivery. The warranty is considered valid only when the product will be damaged by causes attribut- able to TECSYSTEM SHANGHAI, such as manufacturing or components defects. The warranty is invalid if the Product proves tampered / modified, incorrectly connected, because voltages outside the limits, non-compliance with the technical data for use and as- sembly, as described in this instruction manual.
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可写寄存器包括以下数据:Alarm, Trip, Fan-on 和Fan-off。 因此合理的启动地址为:00-21对Alarm门限和Trip门限用,00-25,00-29对Fan-on门限和Fan -off,00-37用于对其它各种温度监视器的各种可选择的门限用。 可加载Lo点数:从1至8(最大)。 如果发送到某个地址的某个写入地址不同与上述启动地址,则ModBus就会给予一个错误码02 (错误数据地址)的应答。 如果向超过8个寄存器发送某个写入请求(LO点数),则ModBus就会拒绝此请求并且不再做出 应答;因此查询就会超时。 31) 远程编程注意事项 如果您进行远程编程,那么您必须清楚对通道CH 1-2-3 的高温报警设置(寄存器00-17,00- 18,00-19)必须设定数值相同,因为温控器按照统同一共享数据来管理各通道。 同样也需要注意的是Trip门限(寄存器 00-25,00-26,00-27)。 Fan on门限(寄存器00-29,00-30,00-31,00-32)应加载相同数值。 Fan off门限(寄存器00-33,00-34,00-35,00-36)应加载相同数值。 同样在通过使用ModBus的远程编程阶段您必须注意Alarm门限应低于Trip门限,Fan-on门限必 须低于Fan-off门限。 高温报警和跳闸报警门槛值必须一起通过远程编写操作编程。 因此从地址21到28这8组地址作为专一编写地址 同样的风机启动和停止门槛值通过29到36这8个地址编写 如果在加载这些门槛值方式不对,NT511温控将不在继续编程和数据存储,接下来读到数据为 原来的编程数据 当发送一条 “询问”指令后,NT511温控将需要大概1秒钟的时间将数据存贮进储存器,在这 期间,Modbus通讯系统不能再处理其他“询问”指令 如果远程“询问”编程成功编写,那么温控器将自动复位并上传最新的数据参数值 NT511 AD ANALOG & DIGITAL INSIDE...
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范围 0-200º Temperature Holding register 偏置 20 (10) 20=0℃ 21=1℃ Temperature Holding 22=2℃ register … Temperature Holding register Holding Stato Ch1 register Holding Stato Ch2 register (详见注释1) Holding Stato Ch3 register Holding Stato Ch4 register NT511 AD ANALOG & DIGITAL INSIDE...
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Story Ch4 register Alarm Holding -point Ch1 register 从21到28构成专 Alarm Holding 用编写区 -point Ch2 register Addresses from 21 to 28 Alarm Holding constitute a sole writing -point Ch3 register block Alarm Holding -point Ch4 register NT511 AD ANALOG & DIGITAL INSIDE...
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Holding -point Ch2 register Fan-Off Holding -point Ch3 register Fan-Off Holding -point Ch4 register Holding General Flag (见注解 4) register Holding “Free” Free register register Holding 风机自检运行 register Holding FCD 异常温 SET_FCD register 升设定 NT511 AD ANALOG & DIGITAL INSIDE...
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G (+) A -> A if NOT j=8 then goto 5 i +1 -> i 10) if NOT i = N then goto 3 11) A -> in CRC (result is in the order L,H) NT511 AD ANALOG & DIGITAL INSIDE...
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