NI GPIB-140A GPIB Extender

Description

IEEE 488 Compatibility

The GPIB-140A, GPIB-140A/2, and GPIB-130 bus extenders are compatible with both IEEE 488.1 and IEEE 488.2. Unlike other extenders that respond to all GPIB addresses during the Find All Listeners protocol, this operation occurs normally with the GPIB-140A and GPIB-140A/2

Filter Settings

Three filter settings are available for each channel. The filters on the [c]FP-AI-111 input channels are comb filters that provide notches of rejection at multiples, or harmonics, of a fundamental frequency. You can select a fundamental frequency of 50, 60, or 500 Hz. The [c]FP-AI-111 applies 95 dB of rejection at the fundamental frequency and at least 60 dB of rejection at each of the harmonics. In many cases, most of the noise components of input signals are related to the local AC power line frequency, so a filter setting of either 50 or 60 Hz is best.

This section describes the isolation of the [c]FP-AI-111 and its compliance with international safety standards. The field wiring connections are isolated from the backplane and the inter-module communication bus. The isolation is provided by the module, which has optical and galvanic isolation barriers designed and tested to protect against transient fault voltages of up to 2,300 Vrms.

Follow these guidelines to ensure a safe total system:

• The [c]FP-AI-111 has a safety isolation barrier between the I/O channels and the inter-module communication bus. There is no isolation between channels unless otherwise noted. If any of the channels on a module are wired at a hazardous potential, make sure that all other devices or circuits connected to that module are properly insulated from human contact.

• Do not share the external supply voltages (the V and C terminals) with other devices (including other FieldPoint devices), unless those devices are isolated from human contact.

• For Compact FieldPoint, you must connect the protective earth (PE) ground terminal on the cFP-BP-x backplane to the system safety ground. The backplane PE ground terminal has the following symbol stamped beside it: . Connect the backplane PE ground terminal to the system safety ground using 14 AWG (1.6 mm) wire with a ring lug. Use the 5/16 in. panhead screw shipped with the backplane to secure the ring lug to the backplane PE ground terminal.

• As with any hazardous voltage wiring, make sure that all wiring and connections meet applicable electrical codes and commonsense practices. Mount terminal bases and backplanes in an area, position, or cabinet that prevents accidental or unauthorized access to wiring that carries hazardous voltages.

• Operate the [c]FP-AI-111 only at or below Pollution Degree 2. Pollution Degree 2 means that only nonconductive pollution occurs in most cases. Occasionally, however, a temporary conductivity caused by condensation must be expected.

• Refer to the FieldPoint product label for regulatory certification under hazardous location standards. If the FieldPoint product is not certified for operation in hazardous locations, do not operate it in an explosive atmosphere or where there may be flammable gases or fumes.

Cables
T7 cable for GPIB-140A (up to 1 km)
10 m………………………………………………………………………..182805-010
50 m………………………………………………………………………..182805-050
100 m………………………………………………………………………182805-100
500 m………………………………………………………………………182805-500
1000 m ……………………………………………………………………182805-01K
T8 cable for GPIB-140A/2 (up to 2 km)
100 m………………………………………………………………………183164-100
200 m………………………………………………………………………183164-200
500 m………………………………………………………………………183164-500
1000 m ……………………………………………………………………183164-01K
2000 m ……………………………………………………………………183164-02K
T2, T5, and T6 cables for GPIB-130 ……………………………..See page 710