AimTTi SMU4000 Series User manual

LINK ADAPTOR
For SMU4000 Series
INSTRUCTION MANUAL
EN

1 SMU Link Adaptor Instruction Manual
CONTENTS
INTRODUCTION 2
CONNECTING THE LINK ADAPTOR TO THE SMUS 3
SYNCHRONISING 2 SMUS 4
DIO EXPANDER 6
TEST BRIDGE SMU 9
Symbols
The following symbols are displayed on the instrument and throughout the manual, to ensure
the safety of the user and the instrument, all information must be read before proceeding.
CAUTION
Indicates a hazard that could damage the product that may result in loss of important data or
invalidation of the warranty.
NOTE
Indicates a helpful tip.
TIPS
Indicates an advisory tip or FAQ (Frequently asked question).
User manuals, additional support and service information can be found at:
www.aimtti.com/support
UKCA ‘UK Conformity Assessed’ marking is a certification mark that affirms
conformity with the applicable requirements for products sold within Great Britain.
‘CE’ marking is a certification mark that affirms the good's conformity with
European health, safety, and environmental protection standards.
WEEE (do not dispose in household waste)

2 SMU Link Adaptor Instruction Manual
1. INTRODUCTION
For use with the SMU4000 Product Series:
SMU4001 & SMU4201
This SMU Link Adaptor is designed to connect two Aim-TTi SMUs together via the DIO terminal
ports on the rear panel.
It can also be used as a DIO Expander for one or two instruments, removing the need to wire
each DIO terminal individually.
Push terminal access is provided to all DIO port pins, the minimum recommended cable
diameter is 0.4mm, the maximum is 0.8mm.
CAUTION
5.25Vpk Max input voltage.
Always use shrouded ferrules to prevent the risk of shock.
In this Kit:
1 x SMU Link Adaptor
2 x 280mm 10 way ribbon cable
1 x Instruction leaflet

3 SMU Link Adaptor Instruction Manual
2. CONNECTING THE LINK ADAPTOR TO THE SMUS
The Link Adaptor mates with standard 10W (2 x 5 DIL) female 2.54mm pitch IDC ribbon cable.
Connecting to the SMU
Image for illustration purposes only.
Strain relief has been added to the SMU
connection end of the ribbon cable to allow
the cable to be removed without damaging
the cable.
The cable must be fitted with the red stripe towards pin 1.
Connecting to the Link Adaptor
Ensure the cable is fitted with the red stripe towards the black dot on the Link Adaptor
To fit the cable to the link adaptor:
1. Open the connector holder as shown.
2. Push the cable into the adaptor, the connector holder will close as the cable is pushed in.
3. Push until the connector holder is fully closed.

4 SMU Link Adaptor Instruction Manual
3. SYNCHRONISING 2 SMUS
A fully functioning two channel SMU can be created with two SMUs via a handshake triggering
system using the Link Adaptor to connect the trigger DIO lines.
NOTE
When using the Link adaptor to connect two SMUs, the adaptor internally connects the
‘Trigger In’ of each SMU to the ‘Trigger Out’ of the other. 'Trigger Out' will be set once all
measurements associated with the level / shape are complete.
This combination of 'Trigger in' and 'Trigger Out' allows for the handshaking of multiple
instruments without further wiring.
For full synchronisation of two SMUs, consider the following settings with the 'Manual Setup'
of the SMU:
To initialise the test, both SMUs must be ‘RUN’.
The DIO must all be set to either active high or active low on both instruments.
CNFG > [System] Interfaces > [DIO] Pin Action
A trigger (either level or shape) must be set on both instruments, A shape other than steady
must be selected to set the trigger.
CNFG > [Source Measure Action] Manual Setup > [Timing] Trigger

5 SMU Link Adaptor Instruction Manual
Timing Measurements from trigger In/ trigger Out:
The time for Trigger In/ Trigger Out to respond will typically take:
Trigger Out ≤50ms
Trigger In ≤ 1ms
TIPS
If both sets of results are intended to be plotted on one graph, the total number of
measurements on both SMUs must match.
To maintain synchronisation, set the same number of levels/ shapes on both SMUs.
See the SMU4000 Series Instruction Manual for more details.
Example setup

6 SMU Link Adaptor Instruction Manual
4. DIO EXPANDER
As well as connecting 2 SMUs together, the SMU Link Adaptor can be used with a single SMU
as a DIO expander- removing the need to wire each DIO terminal individually.
SMU-1 / SMU-2
The DIO terminal connections detailed in this section can be used for up to two SMUs via the
SMU-1 and SMU-2 connections.
SMU-1 terminals (a) are extended from the connection labelled SMU-1 (b).
SMU-2 terminals (c) are extended from the connection labelled SMU-2 (d).
Connecting to the DIO terminals
The Link Adaptor provides push terminal access to all DIO port pins, the minimum
recommended cable diameter is 0.4mm, the maximum is 0.8mm.
Always use shrouded ferrules to prevent the risk of shock.
Press the orange actuators of the push terminals, insert the connecting wire and release the
actuator to secure the connection.
(b)
(d)
(c)(a)

7 SMU Link Adaptor Instruction Manual
+5V / 0V
These lines are provided for powering external control circuitry. The 5V supply is internally
fused (resettable fuse) to 500mA.
DIO 2-6 (General)
DIO configuration is exclusively for use with sequence mode. Used for triggering input and
output events from within a sequence, allowing a defined sequence to control or be controlled
by external circuitry.
TRIG(ger) IN / OUT
Triggered control of the timing of shape waveforms. Used to step through the points of a
shape waveform, or to repeat shape waveforms. Once the event has been triggered and all
associated measurements to that event have been made, the instrument sets a global trigger
output on the DIO port.
The adaptor connects the ‘TRIG(ger) IN’ of each SMU to the ‘TRIG(ger) OUT’ of the other.
INTERLOCK (High Voltage)
Controls the High Voltage (HV) interlock via external circuitry. When controlled via the DIO, the
High Voltage Interlock works independently from the password protection; when activated or
deactivated, the password protection is not required to be removed.

8 SMU Link Adaptor Instruction Manual
Input / Output
Each DIO line can be configured as an Input or an Output from the SMU.
CNFG > [System] Interfaces > [DIO] Configure
CAUTION
5.25Vpk Max input voltage.
Always use shrouded ferrules to prevent the risk of shock.
Input levels:
Input allows an external device to control the state of the line.
When using as a input, the resting state is always high (4.7kohm pull-up (internal) to +5V).
Logic Zero (low):-0.25V to +1V (diode clamped to 0V).
Logic One (high): +1.75V to +5.25V (diode clamped to +5V).
Output Levels:
Output allows the SMU to control the state of the line on external device.
When using as an output, the active high resting state will be low and the active low resting
state will be high.
Logic zero (low): open-drain MOS, typically 0.2ohm, 100mA maximum sink.
Logic one (high): nominally 4.7kohm pull-up (internal) to +5V.

9 SMU Link Adaptor Instruction Manual
5. TEST BRIDGE SMU
Test Bridge SMU simplifies the test setup when using multiple instruments allowing the
complete control of one or two instruments from one place.
This program also provides advanced graphing features which enable results from multiple
SMUs to be plotted on a single graph, including options to split the data into steps and repeats
for further analysis.
Test Bridge SMU is a free software program, available to download from
www.aimtti.com/support