Renishaw HSI User manual

HSI hard-wired system interface
Installation guide
H-5500-8554-04-A

Renishaw part no: H-5500-8554-04-A
First issued: 11.2008
Revised: 01.2020
© 2008–2020 Renishaw plc. All rights reserved.
This document may not be copied or reproduced in whole or in part, or transferred to any other media
or language, by any means, without the prior written permission of Renishaw.
The publication of material within this document does not imply freedom from the patent rights of
Renishaw plc.

i
Contents
Safety ........................................................................1.1
Safety ....................................................................1.1
HSI basics....................................................................2.1
Introduction ................................................................2.1
HSI components ............................................................2.2
RENGAGE™ probe connector (3-way) ........................................2.3
Standard probe connector (3-way)............................................2.3
Controller connector (12-way) ...............................................2.3
ERROR LED ............................................................2.3
STATUS LED ............................................................2.4
PROBE TYPE LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4
Remote device ...........................................................2.4
Solid-state relay (SSR) .......................................................2.5
Probe inhibit function.........................................................2.6
12 V to 30 V M-code connected directly to the HSI ...............................2.6
0 V M-code connected directly to the HSI ......................................2.6
M-code driven relay contact .................................................2.7
M-code driven open collector ................................................2.7
HSI dimensions .............................................................2.8
HSI specification ............................................................2.9
System installation ...........................................................3.1
Installing the HSI ............................................................3.1
Typical HSI installation ....................................................3.1
Mounting the HSI to a DIN rail ...............................................3.2
Connecting the HSI to a RENGAGE™ probe and the CNC controller.................3.3
Connecting the HSI to a standard probe and the CNC controller ....................3.4
Parts list .....................................................................4.1

HSI installation guide
ii
Contents
General information ..........................................................5.1
Disclaimer .................................................................5.1
Trade marks................................................................5.1
Warranty ..................................................................5.1
China RoHS ...............................................................5.1
Changes to equipment .......................................................5.1
CNC machines .............................................................5.2
Care of the interface .........................................................5.2
Patents ...................................................................5.2
EU declaration of conformity ...................................................5.2
WEEE directive .............................................................5.2
REACH regulation ...........................................................5.3
FCC Information to user (USA only) .............................................5.3

1.1
Safety
Safety
In all applications involving the use of machine tools or CMMs, eye protection is recommended.
Information to the machine supplier/ installer
It is the machine supplier’s responsibility to ensure that the user is made aware of any hazards
involved in operation, including those mentioned in Renishaw product literature, and to ensure that
adequate guards and safety interlocks are provided.
Under certain circumstances, the probe signal may falsely indicate a probe seated condition. Do not
rely on probe signals to halt the movement of the machine.
Information to the equipment installer
All Renishaw equipment is designed to comply with the relevant EU and FCC regulatory requirements.
It is the responsibility of the equipment installer to ensure that the following guidelines are adhered to,
in order for the product to function in accordance with these regulations:
• any interface MUST be installed in a position away from any potential sources of electrical noise
(for example, power transformers, servo drives);
• all 0V/ground connections should be connected to the machine “star point” (the “star point” is a
single point return for all equipment ground and screen cables).This is very important and failure to
adhere to this can cause a potential difference between grounds;
• all screens must be connected as outlined in the user instructions;
• cables must not be routed alongside high current sources (for example, motor power supply
cables), or be near high-speed data lines;
• cable lengths should always be kept to a minimum.
Equipment operation
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the
equipment may be impaired.

HSI installation guide
1.2
Safety
This page is intentionally left blank.

2.1
Introduction
HSI basics
CNC machine tools or grinding machines using RENGAGE™ or standard probes for workpiece
inspection require an interface unit to convert the signals from the probe into voltage-free solid state
relay (SSR) outputs for transmission to the CNC machine controller. The maximum SSR output
operating current is 50 mA.
Typically installed within the CNC machine controller cabinet, and located away from sources of
interference such as transformers and motor controls, the HSI can draw its power from the machine’s
nominal 12 Vdc to 30 Vdc supply. Where such a supply is not available, the HSI can be powered using
any 12 Vdc to 30 Vdc (minimum 0.5 A) power supply.
The supply is protected by a 140 mA self-resetting fuse (its nominal current, when connected to an
inspection probe, is either 40 mA @ 12 V or 23mA @ 24 V). To reset the fuse, remove the power then
identify and rectify the cause of the fault.

HSI installation guide
2.2
HSI basics
HSI components
The following components are housed within the front face of the HSI (as shown in the figure below):
• RENGAGE probe connector block (3-way);
• Standard probe connector block (3-way);
• Control connector block (12-way);
• ERROR LED;
• STATUS LED;
• PROBE TYPE LED.
RENGAGE
probe connector
block (3-way)
Controller connector
block (12-way)
Standard probe
connector block (3-way)
ERROR LED
STATUS LED
PROBE TYPE LED

2.3
HSI basics
RENGAGE™ probe connector (3-way)
The RENGAGE probe connector is a three-pin connector and is designed to connect to a Renishaw
RENGAGE probe.
Standard probe connector (3-way)
The standard probe connector is a three-pin connector and is designed to connect to Renishaw
standard probes.
Controller connector (12-way)
The controller connector is a 12-pin connector and is designed to connect the HSI to the CNC
machine controller and appropriate power supply as follows:
Terminals 1 to 3
These are used to connect the inhibit function. For more information about the inhibit function, please
refer to page 2.6.
Terminals 4 and 5
If the HSI is installed where it cannot be easily seen, an output is provided so that a remote device
(such as an LED or buzzer – not supplied) can be connected to the HSI and positioned near to the
machine operator. This is an open drain pull-up output at a nominal 10 mA.
Terminals 6 to 8
These are the SSR probe trigger outputs:
• terminal 6 is normally open (NO);
• terminal 7 is the common connection;
• terminal 8 is normally closed (NC).
The current output from any of these terminals is limited to 60 mA.
Terminal 9
This is used to connect the inhibit functions to 12V to 30V. It is fused at 100 mA.
Terminals 10 to 12
These are used to supply power to the interface. The supply is fused at 140 mA.
ERROR LED
The ERROR LED flashes red to indicate that an error condition has occurred. This happens when too
much current is supplied to the probe or to the SSR output.

HSI installation guide
2.4
HSI basics
STATUS LED
The STATUS LED displays:
• a constant green when the probe is seated;
• a constant red when the probe is triggered or no probe is connected.
If the LED is unlit, there is no power supply to the HSI.
PROBE TYPE LED
The PROBE TYPE LED displays:
• a constant green when the interface is connected to a RENGAGE probe;
• a constant orange when the interface is connected to a standard probe or when no probe is
connected;
• a flashing red when a probe inhibit function is active.
If the LED is unlit, then there is no power supply to the HSI.
Remote device
The remote device circuit provides:
• a closed output to indicate that the probe is seated (maximum current is 10 mA);
• an open output to indicate that the probe is triggered, that no probe is connected or that the power
is off.

2.5
HSI basics
Solid-state relay (SSR)
The SSR relay is configured as follows:
Normally closed (NC)
or
Normally open (NO)
Maximum current is ±50 mA.
Maximum voltage is 30 V.
NOTE: Change of state debounce time is 25ms ±5ms. Debounce time is the time delay between the
HSI responding to a probe trigger and the point at which the probe can be used again.
SSR
OUTPUT
OPTIONS
PROBE
STATUS
Stylus contact bounce Reseat
At rest Deflected At rest
Trigger point Move clear
Closed
Open
Open
Closed
Status NC
Status NO

HSI installation guide
2.6
HSI basics
Probe inhibit function
The inhibit function is used to switch off the RENGAGE probe and is activated by an M-code.
It is recommended that the RENGAGE probe is switched off using the inhibit function whenever it is
not in use, and only switched on immediately before it is required. This will ensure that the RENGAGE
probe is initialised just before measurement commences to ensure optimum performance.
When the RENGAGE probe is switched on, it will take a minimum of 0.4seconds before it is ready to
measure and must remain stationary during this period.
The standard probe may also be inhibited using this function, if required. When the probe is inhibited,
the status output is forced into the non-triggered (seated) state, irrespective of actual probe status.
There are several alternative methods of selecting the inhibit function, each of which is listed below:
12 V to 30 V M-code connected directly to the HSI
When using this method, it is recommended that the HSI is connected as shown in the following
diagram. Alternatively, pin 2 (INHIBIT RETURN) may be linked to pin 1 (0 V) on the HSI 12-way
connector, rather than to the 0 V circuit within the machine’s CNC controller.
An M-code is used to activate the inhibit function. The M-code must supply a constant voltage of
between 12 V and 30 V to pin 3 (INHIBIT) on the HSI 12-way connector. To deactivate the inhibit
function, the 12 V to 30 V supply must be removed from pin 3 (INHIBIT) of the HSI 12-way connector.
0 V M-code connected directly to the HSI
When using this method, it is recommended that the HSI is connected as shown in the following
diagram. Alternatively, pin 3 (INHIBIT) may be linked to pin 9 (12 V to 30 V OUT (FUSED 100mA)) on
the 12-way connector, rather than to the 12 V to 30 V circuit within the machine’s CNC controller.
An M-code is used to activate the inhibit function. The M-code must supply a constant 0 V to pin 2
(INHIBIT RETURN) on the HSI 12-way connector. To deactivate the inhibit function, a constant voltage
of 12 V to 30 V must be applied to pin 2 (INHIBIT RETURN) on the HSI 12-way connector.
HSI CONTROL CONNECTIONS
1 0 V
2 INHIBIT RETURN
3 INHIBIT
CNC CONTROLLER
0 V
12 V to 30 V M-code
HSI CONTROL CONNECTIONS
2 INHIBIT RETURN
3 INHIBIT
9 12 V to 30 V OUT
(FUSED 100 mA)
CNC CONTROLLER
0 V M-code
12 V to 30 V

2.7
HSI basics
M-code driven relay contact
When using this method, it is recommended that the HSI is connected as shown in the following
diagram. Shorting together pin 1 (0 V) and pin 2 (INHIBIT RETURN) of the HSI 12-way connector (less
than 100 Ω) will force the output into a seated state, irrespective of actual probe status, and remove
power from the probe. Breaking contact between pin 1 and pin 2 (greater than 50 kΩ) will remove the
inhibit function.
M-code driven open collector
When using this method, it is recommended that the HSI is connected as shown in the following
diagram. An M-code is used to activate the inhibit function.
HSI CONTROL CONNECTIONS
1 0 V
2 INHIBIT RETURN
3 INHIBIT
M-code
driven
Relay
contact
9 12 V to 30 V (FUSED 100 mA)
HSI CONTROL CONNECTIONS
1 0 V
2 INHIBIT RETURN
3 INHIBIT
M-code
driven
Open
collector
9 12 V to 30 V (FUSED 100 mA)

HSI installation guide
2.8
HSI basics
HSI dimensions
98 (3.86)
134 (5.28)
34.7 (1.37)
Dimensions given in mm (in)

2.9
HSI basics
HSI specification
Principal application The HSI processes signals from RENGAGE probes or standard
probes and converts them into voltage-free SSR output, which is
then transmitted to the CNC machine controller.
Dimensions Width:
Height:
Depth:
134 mm (5.28 in)
34.7 mm (1.37 in)
98 mm (3.86 in)
Supply voltage 12 Vdc to 30 Vdc
Supply current 40 mA @ 12 V, 23 mA @ 24 V
Output signal Probe status
Voltage-free solid-state (SSR) output, configurable normally open
or normally closed.
Mounting DIN rail. Alternative mounting using screws.
Input/output protection SSR output is protected by overcurrent circuitry, the output current
should not exceed 50 mA. Power input is protected by a 140 mA
resettable fuse.
Diagnostic LEDs Error, status and probe type.
Connection provided for remote device (LED or buzzer).
Environment Storage temperature −25 °C to +70 °C (−13 °F to +158 °F)
Operating temperature +5 °C to +55 °C (+41 °F to +131 °F)

HSI installation guide
2.10
HSI basics
This page is intentionally left blank.

3.1
System installation
Installing the HSI
Typical HSI installation
RENGAGE
probe
HSI interface
CNC
machine
controller
Optional power
supply unit
Cable
Workpiece
Stylus
NOTE: The connection between the probe socket and the HSI interface must be screened and
connected to ground at the interface.
Cable
NOTE: Only one probe can be
connected at a time.
Standard
probes
compatible
with the HSI
LP2
TS27R
TS34
TS20
RP3
RENGAGE
probe
compatible
with the HSI
MP250
Standard
probe

HSI installation guide
3.2
System installation
Mounting the HSI to a DIN rail
34.7
(1.37)
134
(5.28)
98
(3.86)
M4 (× 2)
Standard DIN rail mounting
Alternative mounting
Dimensions given in mm (in)

3.3
System installation
Connecting the HSI to a RENGAGE™ probe and the CNC controller
For further information on RENGAGE™ probes compatible with HSI, refer to page 3.1.
NOTE: When the SSR output is connected as normally open (NO), the RENGAGE probe will
remain in the non-triggered (seated) state if the power supply is interrupted or if the probe is
damaged.
Outer spring pin, Green
Inner spring pin, Blue
Probe holder fixed socket
for RENGAGE probe
HSI
RENGAGE probe connector (3-way)
1 Probe input 0 V
2 Probe input 5 V
3 Screen
CNC CONTROLLER
Controller connector (12-way)
1 0 V
2 Inhibit return
4 External LED 0 V
5 External LED 10 V
6 NO*
7 Common
10 Screen
11 Supply 0 V
12 Supply 12 V to 30 V
8 NC**
Status
output
SSR
Power
input
Connect either pin 6 or
pin8, but do not connect
both wires
Probe
input
I/O supply
skip input
Controller protective earth (also
referred to as PE star point or
earth plate)
Screen
0 Vdc
12 Vdc to 30 Vdc
Controller reference ground
912 V to 30 V out
(fused 100 mA)
3 Inhibit
Probe inhibit
function. Refer
to page 2.6
for connection
information.
Green/Yellow
Probe status *Normally open (NO) **Normally closed (NC)
Probe triggered Closed Open
Probe seated Open Closed

HSI installation guide
3.4
System installation
Connecting the HSI to a standard probe and the CNC controller
For further information on standard probes compatible with HSI, refer to page 3.1.
NOTE: When the SSR output is connected as normally open (NO), the standard probe will
remain in the non-triggered (seated) state if the power supply is interrupted or if the probe is
damaged.
Outer spring pin
Inner spring pin
Probe holder fixed socket
for standard probe
HSI
Standard probe connector (3-way)
1 Probe input +
2 Probe input −
3 Screen
CNC CONTROLLER
Controller connector (12-way)
1 0 V
2 Inhibit return
4 External LED 0 V
5 External LED 10 V
6 NO*
7 Common
10 Screen
11 Supply 0 V
12 Supply 12 V to 30 V
8 NC**
Status
output
SSR
Power
input
Connect either pin 6 or
pin8, but do not connect
both wires
Probe
input
I/O supply
skip input
Controller protective earth (also
referred to as PE star point or
earth plate)
Screen
0 Vdc
12 Vdc to 30 Vdc
Controller reference ground
912 V to 30 V out
(fused 100 mA)
3 Inhibit
Probe inhibit
function. Refer
to page 2.6
for connection
information.
Probe status *Normally open (NO) **Normally closed (NC)
Probe triggered Closed Open
Probe seated Open Closed