Yokogawa Model 701905 Conversion Cable



Yokogawa Model 701905 Conversion Cable

Product positioning and core applications

Model 701905 is a Yokogawa specific conversion cable that is only compatible with Yokogawa differential probes (models 701977 or 701978). Its core function is to convert the metal BNC connector of the differential probe into an insulated BNC connector, thereby achieving measurement in the following scenarios:

The differential probe could originally be directly connected to a Yokogawa oscilloscope or non insulated module, but after conversion from 701905, it can be used in conjunction with Yokogawa insulated modules.

After adapting to the insulation module, it can expand measurement capabilities, support signal measurement with higher voltage and faster sampling rate, and is suitable for insulation measurement scenarios such as power electronics and industrial control.

Packaging and accessory inspection

After opening the box, it is necessary to confirm that the following information is intact. If there are any model errors, missing accessories, or damaged appearance, please contact the Yokogawa dealer immediately:

Product/Document Name Model/Manual Number Quantity/Purpose

Conversion cable 701905 1 piece (core product)

Conversion Cable User Manual (English) IM 701905-01Z2 Volume 1 (this manual)

Chinese specific document IM 701905-92Z1 Volume 1 (Instructions for the Chinese market)

Global Contact List PIM 113-01Z2 Volume 1 (Yokogawa Global Office Contact Information)

Safety regulations

1. Core safety warning (to avoid electric shock/equipment damage)

Specific limitation: It can only be used in conjunction with Yokogawa differential probes (701977/701978) and Yokogawa insulation modules. It is prohibited to use it for other brands of equipment or non specified scenarios, otherwise it may cause high voltage hazards or equipment failures.

Grounding requirement: The grounding plug (4 Φ) of the cable must be connected to the functional grounding terminal of the measuring instrument. Failure to ground may result in measurement errors or safety hazards.

Prohibition of direct connection: Differential probes (701977/701978) can be directly connected to non insulated modules of Yokogawa, but direct connection to insulated modules is prohibited - otherwise high voltage may be generated between the input terminals of the differential probe, causing electric shock or equipment damage.

Connector matching: Only insulated BNC connectors of 701905 can be connected to insulated BNC connectors of insulated modules. It is forbidden to connect metal BNC connectors of non insulated modules to avoid damaging the insulated BNC interface.

2. Operation safety rules

Stacking restriction of grounding plugs: Multiple grounding plugs can be stacked through a "stacking connector (4 Φ)", but up to 4 can be stacked. Excessive stacking can cause load on the terminals, resulting in poor contact or terminal failure.

Operation sequence: Before connecting/disassembling, the power supply of the measuring instrument must be turned off to avoid short circuits or electric shocks caused by live operation; After the connection is complete, turn on the power to ensure safe wiring.

Pre reading of documents: Before use, it is necessary to read through the user manuals of the differential probe, measuring instrument, and insulation module, familiarize oneself with the rated parameters and operating limitations of each device.

Product Structure and Connection Process

1. Component name and function

Component Name Location (Differential Probe Side/Measuring Instrument Side) Function

Connect the metal BNC interface of the differential probe (701977/701978) on the differential probe side of the metal BNC connector to transmit signals

Insulated BNC connector connects the measuring instrument side to the insulated BNC interface of the insulation module on the measuring instrument, achieving insulation signal transmission

The signal transmission carrier in the middle part of the cable body includes shielding design to reduce interference

Grounding cable (GND cable): Connect the grounding plug and stacking connector on the measuring instrument side, with a length of approximately 300mm (including the plug)

Insert the grounding plug (4 Φ) into the functional grounding terminal of the measuring instrument on the measuring instrument side to ensure grounding safety

Stacking connector (4 Φ) next to the grounding plug is used to stack multiple grounding plugs (up to 4), suitable for multi probe scenarios

Pay attention to the safety warning information marked on the cable body of the solution tag, reminding users to follow the operating procedures

2. Standard connection process (single probe scenario)

Power off preparation: Turn off the power supply of the measuring instrument, ensure that all equipment is in a power-off state, and avoid live wiring.

Grounding connection: Insert the grounding plug of 701905 into the functional grounding terminal of the measuring instrument to ensure reliable grounding.

Connect the insulation module: Insert the insulation BNC connector of 701905 into the insulation BNC interface of the installed insulation module on the measuring instrument, and tighten it to avoid poor contact.

Connect differential probe: Insert the metal BNC connector of differential probe (701977/701978) into the metal BNC connector of 701905 to ensure smooth signal transmission path.

Power supply connection: Connect the power terminal of the differential probe to the probe power terminal of the measuring instrument (the measuring instrument needs to have the "probe power output" option); If the instrument does not have this terminal, a power supply (model 701934) sold separately by Yokogawa can be used for power supply.

Power on test: After confirming that all connections are correct, turn on the power of the measuring instrument and check if the signal transmission is normal.

3. Multi probe scenario (up to 4 differential probes)

If multiple differential probes need to be used simultaneously, repeat steps 2-5 above:

Each differential probe needs to be paired with one 701905 conversion cable.

The grounding plug is stacked through a "stacking connector" (up to 4) to ensure that each grounding plug is reliably grounded.

Technical specifications

Specification project specific parameter description

The rated voltage of 42 V needs to be used for a long time within the rated voltage range. Overvoltage may damage the insulation layer of the cable

The working temperature range of 5~40 ℃ may cause a decrease in cable performance and unstable signal transmission beyond this range

The total length of the cable is about 310 mm, including connectors at both ends, suitable for the wiring requirements of conventional measurement scenarios

The length of the grounding cable is about 300 mm, including the grounding plug, to ensure flexible wiring between the grounding terminal and the insulation module

Weight (including plug) about 50g, lightweight design reduces cable load during measurement, easy to operate

Maintenance and disposal

1. Daily maintenance

Appearance inspection: Before use, check whether the cable insulation layer is damaged, whether the connector is corroded or deformed. If there is any damage, stop using and contact Yokogawa for repair or replacement.

Cleaning: Use only a dry soft cloth to wipe the surface of the cable. Do not use solvents, alcohol, or abrasives to avoid damaging the insulation layer or connector coating.

Storage: When idle, the cable should be placed in a dry and ventilated environment, avoiding direct sunlight, high temperature, or humidity to prevent insulation layer aging.

2. Disposal of waste

When discarding, it is necessary to follow local laws and regulations, classify and dispose of cables and other electronic waste, and prohibit arbitrary disposal.

If the cable contains metal components (such as BNC connectors, grounding plugs), metal recycling can be carried out according to local regulations to reduce environmental impact.