3B Scientific Relay User Manual

3B SCIENTIFIC® PHYSICS

Relay U11368

Instruction sheet

02/09 Hh

1. Safety instructions

• Do not exceed the maximal values specified for

the switching voltage, switching current and
the power rating specified in the technical data
section.

This constitutes a fire hazard.

• Do not connect this relay to high voltage since

this might break down the potential isolation.

2. Scope of delivery

1 Relay
1 Mini DIN connecting lead 8-pin, 60 cm length

3. Description

The relay is an event-triggered switch for switching
on or off components that are electrically isolated
from the experiment set-up. Examples of such
components include light bulbs, small to medium­sized electrical motors, holding magnets and elec­tromagnetically operated valves.

The power relay box is equipped with a set of con­tacts (1 N/C contact, 1 N/O contact, 1 change-over
contact) with printed labels so that can be used as
an N/C or an N/O switch.

When the relay coil is inactive (when no current is
flowing), the N/C contact is closed.

The switch contacts consist of high-grade silver
alloy and are connected to 4-mm safety sockets.

The relay is equipped with safe potential isolation
between the coil and the contacts in conformance
with the VDE 160 standard.

1

4. Technical data

Switching voltage: 250 V AC
220V DC max.

Switching current: 6A AC

0.12 A DC max.
Power rating: 1500 VA max.

1 mW min.

5. Operation

Fig. 2: Discharge curve of a capacitor

• Connect the relay to the “Digital Outputs”

socket of the 3B NETlog

TM

equipment using the
supplied mini DIN lead. It responds to digital
output A.

• Preferably use 4-mm safety leads for the re-

maining electrical connections to the experi­ment set-up.

6. Sample experiment

Measuring the discharge of a capacitor with the
basic experiment board

1 3B NETlog

TM

U11300
1 Relay U11368
1 Basic experiment board U11380
Various experiment leads with 2-mm and 4-mm

plugs

Fig. 1: Measuring the discharge of a capacitor

• Consult the instructions for the basic experi-

ment board U11380 for the electrical connec­tions between the relay and the experiment.

• Select one of the analog inputs (A or B) on the

3B NETlog

TM

module and follow the instructions
for the board regarding the experiment on ca­pacitor discharge. All necessary output value
settings are specified here.

• Conduct and analyse the experiment.

3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com

Subject to technical amendments

© Copyright 2009 3B Scientific GmbH