This standard specifies the general requirements for the working conditions, structural characteristics, general safety and testing of programmable controllers and their related peripherals. This standard specifies the definition of programmable controllers and their related peripherals in terms of device requirements and test verification. It specifies the test methods and steps that must be carried out for programmable controllers and related peripherals to adapt to the controlled machinery or process. It specifies the information that PC manufacturers need to provide. This standard applies to programmable controllers and their related peripherals (such as programming and debugging tools (PADT), test equipment (TE) and man-machine interface (MMIS), etc.). It applies to control systems composed of programmable controllers and their related peripherals. The devices covered by this standard are suitable for overvoltage type 2, used in machinery or industrial process control and ordinary low-voltage facilities with a rated power supply voltage not exceeding 1 000V (AC) (50/60Hz) or 1 500V (DC). GB/T 15969.2-1995 Programmable controllers Part 2: Equipment characteristics GB/T15969.2-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Programmable controllers
Part 2: Equipment characteristics
Programmable controllers
Part2: Equipment characteristics1 Subject content and scope of application
GB/T15969.2—1995
This standard specifies the general requirements for working conditions, structural characteristics, general safety and testing applicable to programmable controllers and related peripherals.
This standard specifies the definition of programmable controllers and related peripherals in terms of device requirements and test verification. It specifies the test methods and steps that must be carried out for programmable controllers and related peripherals to adapt to controlled machinery or processes. It specifies the information that PC manufacturers need to provide. This standard applies to programmable controllers and related peripherals (such as programming and debugging tools (PADT), test equipment (TE) and man-machine interface (MMIS), etc.). It applies to control systems composed of programmable controllers and related peripherals. The devices covered by this standard are suitable for overvoltage category 2 and are used in machinery or industrial process control and ordinary low-voltage facilities with a rated power supply voltage not exceeding 1000V (AC) (50/60Hz) or 1500V (DC). 2 Requirements for working conditions
2.1 Normal working conditions
The PC system should work normally under the following working conditions. 2.1.1 Natural environmental conditions
2.1.1.1 Device ambient operating temperature
The operating temperature range is shown in Table 1.
Table 1 Operating ambient temperature of PC system
Enclosed equipment
(ventilated/non-ventilated)
Limit category
Temperature range
Average temperature within 24h
Permanent equipment
Non-permanent equipment
Open equipment)
Permanent equipment
Non-permanent equipment
Note: 1) Open equipment is designed to be installed in an enclosure. The ambient temperature of the equipment is measured at the bottom of the equipment immediately below, and is allowed to be 15°C higher than the maximum ambient temperature in the room.
As part of the PC system, permanently installed open peripherals shall meet the operating temperature range of the PC if no external cooling is forced (see clause 4.5.1).
Approved by the State Administration of Technical Supervision on December 29, 1995, and implemented on October 1, 1996www.bzxz.net
GB/T15969.2—1995
2) The ambient temperature limit (TmxTTm) of open peripheral equipment not intended for permanent installation shall be specified by the manufacturer. 2.1.1.2 Storage temperature
—25℃～70℃.
2.1.1.3 Relative humidity
The manufacturer may select one of the following two levels. (See Table 2) Table 2 Relative humidity of working environment
Relative humidity severity level
Relative humidity level I
Relative humidity level 1
Note: ① No condensation.
②For electrostatic discharge requirements, see clause 2.1.2.2.2.1.1.4 Pollution level
The manufacturer shall specify the pollution level suitable for its device. 2.1.1.5 Corrosion resistance
Relative humidity range
30%~95%
5%~95%
Corrosion conditions vary with different applications, so it is impossible to specify normal use conditions. If it is under the worst working conditions, see clause 2.2.
2.1.1.6 Altitude
The altitude of the installation site of the device should not exceed 2000m. 2.1.2 Electrical working conditions
2.1.2.1 AC and DC main power supplies
See clause 3.2.
2.1.2.2 Electrical noise conditions
Electrical noise conditions depend on the equipment and network system of the equipment itself, as well as other installed equipment and adjacent PC systems. The lowest noise condition under which the PC system is not affected, see clause 3.9.1. a.
Electrostatic discharge (ESD) conditions, the manufacturer can select one of the severity levels in Table 3 b.
Table 3 Electrostatic discharge working conditions
ESD severity level
ESD level 3
ESD level 4
Note: 1) Incompatible with relative humidity level 1 (see clause 2.1.1.3). 2.1.2.3 Overvoltage category, transient overvoltage control equipment should have condition characteristics that do not exceed overvoltage category I. Device category (reference EC801)
At the point of connection to the main power supply, the transient overvoltage should be controlled within overvoltage category I, that is, it cannot be higher than the pulse voltage corresponding to the rated voltage of basic insulation, and the device or transient suppression device should be able to absorb transient energy (see clause 3.10.1 dielectric resistance requirements). 2.1.2.4 Non-periodic overvoltage
In industrial environments, the disconnection of high-power equipment may cause non-periodic overvoltage peaks in the main power supply. (For example, the fuse of one phase in a three-phase line blows. This will cause a large current pulse at a relatively low voltage level (close to 2 times the voltage peak). The user should take necessary steps to prevent damage to the PC system (such as adding a transformer). 2.1.3 Mechanical working conditions and requirements
In this standard, the working conditions are indirectly specified by the following test requirements applicable to unpackaged portable devices and hand-held portable devices in fixed devices. Experience has shown that devices that pass these tests are suitable for industrial applications on fixed equipment. 2.1.3.1 Vibration
See Table 4 for vibration resistance requirements.
Frequency range (Hz)
10
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