GE HE693RTD660 RTD Input Module

Description

HE693RTD660 allows RTD temperature sensors to be directly connected to the PLC without the need for external signal processing such as sensors and transmitters. All analog and digital processing of RTD signals is performed on the module. These backplane isolation (or bus isolation) modules have programmable resolution in increments of 0.05oC, 0.05oF, 0.1oC, 0.1oF, 0.5oC, 0.5oF. This module has six channels, and its temperature values are reported to the 6% AI input register. Each channel has 6% I alarm bits and one set point alarm. Configure alarm setpoints for each channel using the 6% AQ register. All modules support the following RTD types: PT-100 (platinum, 100W at 0 ° C), Ni-120 (nickel, 120W at 0 ° C), Cu-10 (copper, 10W at 25 ° C), Pt-1000 (platinum, 1000W at 0 ° C), and TD5R silicon (microswitch).

HE693RTD660 technical specifications:
Power consumption (typical value) 200mA@5VDC
Number of channels 6
Resolve 0.05 ° C, 0.05 ° F, 0.1 ° C, 0.1 ° F, 0.5 ° C, or 0.5 ° F
Accuracy+/-0.3 ° C
RTD short circuit without damage for an indefinite period of time
Required I/O points 6% AI, 6% AQ, 16% I
Input impedance>1000 megohms
Input transient protection suppression diode
A/D conversion type 18 digits, integral
Update time 50 channels/second. (660) 12.5 channels/second. (665/666)
Average RTD current 330 microamps
Channel to channel tracking 0.1 ℃
Operating temperature 0 to 60 ° C (32 to 140 ° F)
Relative humidity 5% to 95% non condensing
Channel to bus isolation 1500V AC
Isolation of 5V AC between channels

The reason why alternative operator stations can exist in the market is because the operator stations developed by DCS developers themselves are not open enough or not in line with the trend. Some new operator stations for DCS can only stay in the market for a relatively short period of time, which indicates this. In some cases where the sales of new DCS are relatively good, manufacturers attempt to migrate some old DCS that previously had a significant market share to their systems in order to capture the market. This is an example of migrating N90 and INFI90 to Emerson’s DELTA V and OVATION systems.

The display software and database of the operator station are DELTA V or OVATION. Purchase an N90 or INFI90 driver software, which is the OPC server. After further development, it becomes the operator station for the migration system. The OPC servers used in the DELTA V and OVATION systems are both ROVISYS. After system migration, the process control unit (PCU) of INFI90 (N90) remains unchanged temporarily. If the controlled object needs to add a controller, DELTA V or OVATION can be used. The OVATION system is widely used in power plant control applications. DELTA V is widely used in chemical, petrochemical, cement, glass and other fields. The migration to DELTA V system is shown in Figure 1. In Figure 1, the APP Station is the database converted from Rovisys’ OPC server to DELTA V operator station, WS Pro+is the engineer station and operator station, and WS OP is the operator station. WS Pro+is mandatory for each system and authorizes WS OP. For safety reasons, two ICIs (CIUs) and two sets of APP stations can be used for redundant operation. In order to improve transmission speed, two ICIs can be sent to the same APP Station without redundancy, and the speed can be doubled. Selected by the user. If the SCSI bus is already used, there is no need to use the latter.

There are many types of system migration, but the transformation of the operator station is the simplest. Due to the strong functionality of the original INFI90 controller IEMFPXX (NMFCXX) and the user-friendly configuration of the engineer station, it has a wide range of applications and a relatively large market share. Later on, due to the application of Ethernet and the inability of the controller to connect to the fieldbus, it was unable to provide real-time data to the information system. The functionality of the human-machine interface was relatively weak, and there was no historical station to retain a large amount of historical data.

There was no simulation function, and it did not support ACTIVE X, etc. Therefore, it was migrated by many new types of DCS. Not only Emerson’s system is being migrated to the BAILEY system, but FOXBORO’s A2 system is also being migrated to the BAILEY system. The current migration result has left the PCU of the old INFI90 unchanged, and the operator station can be both the operator station of the old DCS and the operator station of the new DCS. If a controller needs to be added, a new DCS controller can be added, and in a few years, the PCU can also be replaced with a new DCS controller. The old INFI90 system no longer exists. To protect investment and not change on-site wiring, the INFI90 system terminal board can be left behind. The new DCS has taken over this market.