ISP11 Inline Surge Protection Device for Data Logger Protection on Digital Sensor Lines with Five-Pin Plug-to-Socket Shielded M12 Connections

Overview

The ISP11 is a surge protection device for Modbus RTU communications and power lines at the meteorological (met) station side. The device is intended to connect to the main met side of the cables, providing a greater level of protection for the data logger. 

The ISP11 uses components and a layout that are identical to the ISP10, providing protection that meets the IEC 61000-4-5, level 4 (4 kV, 2000 A) surge protection standard. The five-pin M12 connectors are configured to match the SunSentry system's trunk-line cable pinout, which is compatible with the RS485CBL Five-Conductor Cable with M12 Five-Pin A-Coded Connector. The cable shield is passed through the M12 connector to facilitate shield grounding at the main met station.

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Benefits and Features

  • Inexpensive surge protection for enhanced met station protection
  • Surge protection to IEC 61000-4-5, level 4 (4 kV, 2000 A) standard
  • Sensor cable shield termination to ground
  • Common shorting of signal lines to ground after a powerful surge event, enabling easy line troubleshooting and repair
  • Easy installation or replacement

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Detailed Description

The ISP11 uses a standard A-coded, five-pin M12 connector with shield termination to ground via the mounting hole. This device connects to the main met station and mates with any of the RS485CBL cables.

A hole in the middle of the ISP11 is used for grounding and mounting with the included #10 screw. For proper surge protection, mount the ISP11 to an earth-grounded, conductive part.

The ISP11 is shipped with the following items:

  • #17 high-speed steel drill bit for pilot hole required for the self-tapping screw
  • Self-tapping screw (#10-32 x 1 410SS hex washer head thread cutting screw)
  • 5 cc packet protective oxide-inhibitor grease

Pinout Description for ISP11

M12 Pin Number Function
1 V+
2 Signal
3 Signal Ground
4 V Ground
5

Signal
Coupling Nut

Cable Shield

Compatibility

Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Sensors

Product Compatible Note
ClimaVue 40
CS241DM G2
DustVue 10
DustVue 20
SR30

Miscellaneous

Product Compatible Note
RS485CBL
SunSentry

Additional Compatibility Information

The following sensors can be adapted for use with the RS485CBL and SunSentry RS-485 network topology:

Specifications

Operating Temperature Range -40° to +85°C
Maximum DC Operating Voltage 27.5 Vdc
Maximum Load Current 4 A (@ 25°C)
Surge Protection IEC 61000-4-5 Surge Standard (4 kV, 2000 A)
Maximum Line Current 4 A
Maximum Data Rate 115,200 baud
Connection to Network M12, five-pin, A-coded plug and socket connectors
Cable Configuration Five-wire cable with shield - 1 data channel (1 twisted pair + G for 100 ohm impedance) + power (pwr + gnd) + shield
Mounting and Grounding The center hole is connected to a metal surface that provides a connection to earth ground using the self-tapping screw, allowing for proper surge energy grounding. The cable connectors attach to the met station enclosure connectors, and the trunk-line cables attach to the array or met station sensors.
Enclosure Rating IP67
Number of Surge Events 10 maximum (replacement frequency based upon region's lightning frequency)
Environmental Standards RoHS 3 Directive 2015/863
Total Length 1.45 m (57.0 in.)
Cable Length to Sensor 0.95 m (37.0 in.)
Cable Length to Tee 0.45 m (17.0 in.)
Weight 152 g (5.4 oz)

Listed Under

Common Accessory for the following products:

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