Renishaw HSI-C User manual

HSI-C hard-wired system
interface – congurable
Installation guide
H-6527-8501-02-A

Renishaw part no: H-6527-8501-02-A
First issued: 02.2018
Revised: 01.2021
© 2018–2021 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.
Renishaw plc. Registered in England and Wales. Company no: 1106260. Registered office:
New Mills, Wotton-under-Edge, Gloucestershire, GL12 8JR, UK.

i
Contents
Before you begin .............................................................1.1
Disclaimer .................................................................1.1
Trade marks................................................................1.1
Warranty ..................................................................1.1
China RoHS ...............................................................1.1
Changes to equipment .......................................................1.1
CNC machines .............................................................1.2
Care of the interface .........................................................1.2
Patents ...................................................................1.2
EU declaration of conformity ...................................................1.2
WEEE directive .............................................................1.2
REACH regulation ...........................................................1.3
FCC Information to user (USA only) .............................................1.3
Safety ....................................................................1.4
HSI-C basics .................................................................2.1
Introduction ................................................................2.1
HSI-C components ..........................................................2.2
PROBE CONFIG. LED .....................................................2.3
STATUS LED ............................................................2.3
ERROR LED ............................................................2.3
PROBE TYPE LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3
PROBE CONFIG. switch ...................................................2.4
POWER CONNECTOR (block 1, 4-way) .......................................2.4
CONFIG. 3 OVERRIDE CONNECTOR (block 2, 5-way) ...........................2.5
INHIBIT CONNECTOR (block 3, 5-way) .......................................2.5
PROBE CONNECTOR (block 4, 5-way)........................................2.5
SSR PROBE STATUS CONNECTOR (block 5, 5-way) ............................2.5
SSR PROBE TYPE AND EXTERNAL LED CONNECTOR (block 6, 5-way) ............2.6

HSI-C installation guide
ii
Contents
SSR......................................................................2.6
Probe inhibit function.........................................................2.7
+12 Vdc to +30 Vdc M-code (machine electrical output) connected directly to the HSI-C..2.7
0 Vdc M-code (machine electrical output) connected directly to the HSI-C .............2.7
M-code (machine electrical output) driven relay contact ...........................2.8
M-code (machine electrical output) driven open collector ..........................2.8
Config. 3 override function.....................................................2.9
+12 Vdc to +30 Vdc M-code (machine electrical output) connected directly to the HSI-C..2.9
0 Vdc M-code (machine electrical output) connected directly to the HSI-C ............2.10
M-code (machine electrical output) driven relay contact ..........................2.10
M-code (machine electrical output) driven open collector .........................2.11
HSI-C dimensions ..........................................................2.12
HSI-C specification .........................................................2.13
System installation ...........................................................3.1
Installing the HSI-C ..........................................................3.1
Typical HSI-C installation ...................................................3.1
Mounting the HSI-C to a DIN rail .............................................3.2
Connecting the HSI-C to a RENGAGE probe and the CNC controller.................3.3
Connecting the HSI-C to a standard probe and the CNC controller ..................3.4
Parts list .....................................................................4.1

1.1
Before you begin
Changes to equipment
Renishaw reserves the right to change equipment specifications without notice.
Disclaimer
WHILE CONSIDERABLE EFFORT WAS MADE TO VERIFY THE ACCURACY OF THIS DOCUMENT
AT PUBLICATION, ALL WARRANTIES, CONDITIONS, REPRESENTATIONS AND LIABILITY,
HOWSOEVER ARISING, ARE EXCLUDED TO THE EXTENT PERMITTED BY LAW.
RENISHAW RESERVES THE RIGHT TO MAKE CHANGES TO THIS DOCUMENT AND TO THE
EQUIPMENT, AND/OR SOFTWARE AND THE SPECIFICATION DESCRIBED HEREIN WITHOUT
OBLIGATION TO PROVIDE NOTICE OF SUCH CHANGES.
Trade marks
RENISHAW®and the probe symbol are registered trade marks of Renishaw plc. Renishaw product
names, designations and the mark ‘apply innovation’ are trade marks of Renishaw plc or its
subsidiaries. Other brand, product or company names are trade marks of their respective owners.
China RoHS
For more information, on China RoHS visit:
www.renishaw.com/mtpchinarohs.
Warranty
Unless you and Renishaw have agreed and signed a separate written agreement, the equipment
and/or software are sold subject to the Renishaw Standard Terms and Conditions supplied with such
equipment and/or software, or available on request from your local Renishaw office.
Renishaw warrants its equipment and software for a limited period (as set out in the Standard Terms
and Conditions), provided that they are installed and used exactly as defined in associated Renishaw
documentation. You should consult these Standard Terms and Conditions to find out the full details of
your warranty.
Equipment and/or software purchased by you from a third-party supplier is subject to separate terms
and conditions supplied with such equipment and/or software. You should contact your third-party
supplier for details.

HSI-C installation guide
1.2
Before you begin
CNC machines
CNC machine tools must always be operated by fully trained personnel in accordance with the
manufacturer’s instructions.
Care of the interface
Keep system components clean.
Patents
None applicable.
C
EU declaration of conformity
Renishaw plc declares under its sole responsibility that the HSI-C is in conformity with all relevant
Union legislation.
The full text of the EU declaration of conformity is available at:
www.renishaw.com/mtpdoc
WEEE directive
The use of this symbol on Renishaw products and/or accompanying documentation indicates that the
product should not be mixed with general household waste upon disposal. It is the responsibility of the
end user to dispose of this product at a designated collection point for waste electrical and electronic
equipment (WEEE) to enable reuse or recycling. Correct disposal of this product will help to save
valuable resources and prevent potential negative effects on the environment. For more information,
please contact your local waste disposal service or Renishaw distributor.

1.3
Before you begin
REACH regulation
Information required by Article 33(1) of Regulation (EC) No. 1907/2006 (“REACH”) relating to products
containing substances of very high concern (SVHCs) is available at:
www.renishaw.com/REACH
FCC Information to user (USA only)
47 CFR Section 15.19
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause
undesired operation.
47 CFR Section 15.21
The user is cautioned that any changes or modifications not expressly approved by Renishaw plc or
authorised representative could void the user’s authority to operate the equipment.
47 CFR Section 15.105
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case
the user will be required to correct the interference at his own expense.

HSI-C installation guide
1.4
Before you begin
Safety
Information to the user
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.
If the probe fails, 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Vdc/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.

2.1
Introduction
HSI-C is an interface unit that is intended for use with the RENGAGE™ MP250 and standard probes
used on CNC machine tools and cutter grinding machines. The interface unit is required 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-C can draw its power from the
machine’s nominal +12 Vdc to +30 Vdc supply. Where such a supply is not available, the HSI-C can be
powered using any +12 Vdc to +30 Vdc (minimum 0.5 A) power supply. The machine’s supply should
be appropriately current limited to 10 A maximum.
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 Vdc or 23mA@24 Vdc). To reset the fuse, remove the power
then identify and rectify the cause of the fault.
The HSI-C enables the user to select a suitable level of immunity to false triggering for the connected
probe, caused by machine vibrations or accelerations. The HSI-C can also respond to a config
override input that switches the probe to the highest level of immunity to false triggering when either
manoeuvring to a measure position at high speed, or when measuring with ‘heavy’ styli at high speed.
HSI-C basics

HSI-C installation guide
2.2
HSI-C basics
HSI-C components
The following components are located on the front, top and bottom faces of the HSI-C
(as shown in the figure below):
• PROBE CONFIG. LED
• STATUS LED
• ERROR LED
• PROBE TYPE LED
• PROBE CONFIG. switch
• POWER CONNECTOR (block 1, 4-way)
• CONFIG. 3 OVERRIDE CONNECTOR (block 2, 5-way)
• INHIBIT CONNECTOR (block 3, 5-way)
• PROBE CONNECTOR (block 4, 5-way)
• SSR PROBE STATUS CONNECTOR (block 5, 5-way)
• SSR PROBE TYPE AND EXTERNAL LED CONNECTOR (block 6, 5-way)
Block 1
Block 2
Block 3
Block 4
Block 5
Block 6
NOTE: All connector blocks are pluggable and can be detached from the HSI-C enabling easy wire
connection.
PROBE
CONFIG. LED
STATUS LED
ERROR LED
PROBE TYPE
LED
PROBE CONFIG.
switch

2.3
HSI-C basics
PROBE CONFIG. LED
The PROBE CONFIG. LED displays:
• A constant red when PROBE CONFIG. 1 is selected.
• A constant amber when PROBE CONFIG. 2 is selected.
• A constant green when PROBE CONFIG. 3 is selected.
If the LED is unlit then the PROBE CONFIG. switch is not correctly seated (i.e. in between indicated
switch positions).
STATUS LED
The STATUS LED displays:
• A constant green when the probe is seated.
• A constant red when the probe is triggered or no probes are connected.
If the LED is unlit then there is no power supply to the HSI-C.
ERROR LED
The ERROR LED displays:
• A flashing red to indicate that an error condition has occurred. This happens when an overcurrent
condition exists for either the RENGAGE output or an SSR output.
• A flashing amber to indicate a RENGAGE probe wiring fault between the probe and the interface
(latched until power cycle).
PROBE TYPE LED
The PROBE TYPE LED displays:
• A constant green when the interface is connected to a RENGAGE probe.
• A constant amber when the interface is connected to a standard probe or when no probe is
connected.
• A flashing red when the probe inhibit function is active.
If the LED is unlit then there is no power supply to the HSI-C.

HSI-C installation guide
2.4
HSI-C basics
PROBE CONFIG. switch
The PROBE CONFIG. switch is a three-position slide switch that enables the user to change the
operating configuration of the connected probe.
It is necessary to wait 70 ms after changing the configuration for the change to be implemented.
PROBE
CONFIG.
Standard wired probe First-generation MP250 Second-generation MP250
(with C marking)
1 Filter off Filter off Level 1
2 Filter off Filter on Level 2 (recommended)
3 Filter on Filter on Level 3
For standard wired probes
‘Filter On’ adds a 6 ms nominal delay and is only compatible with on-centre length measurement, for
non-rotating tools or turning tools.
‘Filter Off’ should be selected if measuring radius/diameter of rotating fluted tools or length off-centre.
For first-generation MP250 only
When changing the operating configuration of a first-generation MP250 it is necessary to either reset
the power to the HSI-C, or activate the probe inhibit function. For instructions about the probe inhibit
function, see “Probe inhibit function” on page 2.7. (This is not applicable to a second-generation
MP250).
For second-generation MP250
• Level 1 provides a low latency configuration for measuring in the machine acceleration zone with
small approach distances.
• Level 2 provides a default configuration for general usage.
• Level3 provides a high false trigger immunity configuration for either manoeuvring to the measure
position at high speed, or when measuring with ‘heavy’ styli at high speed.
POWER CONNECTOR (block 1, 4-way)
Used to supply power to the interface. The supply is fused 140 mA.
• Terminal 1: +12 Vdc to +30 Vdc supply unit.
• Terminal 2: 0 Vdc supply.
• Terminal 3: 0 Vdc supply.
• Terminal 4: screen.

2.5
HSI-C basics
CONFIG. 3 OVERRIDE CONNECTOR (block 2, 5-way)
Used to connect the Config. 3 override function.
• Terminal 5: Config. 3 override input.
• Terminal 6: Config. 3 override return.
• Terminal 7: 0 Vdc.
• Terminal 8: +12 Vdc to +30 Vdc out (fused at 100mA).
• Terminal 9: Not connected.
For more information about the Config. 3 override function, see page 2.9, “Config. 3 override function”.
INHIBIT CONNECTOR (block 3, 5-way)
Used to connect the Inhibit function.
• Terminal 10: Inhibit input.
• Terminal 11: Inhibit return.
• Terminal 12: 0 Vdc.
• Terminal 13: +12 Vdc to +30 Vdc out (fused at 100mA).
• Terminal 14: Not connected.
For more information about the inhibit function, see page 2.7, “Probe inhibit function”.
PROBE CONNECTOR (block 4, 5-way)
Provides the connectivity for either a RENGAGE or standard probe.
• Terminal 15: Standard probe input − (negative).
• Terminal 16: Standard probe input + (positive).
• Terminal 17: Screen.
• Terminal 18: RENGAGE probe input 0 Vdc.
• Terminal 19: RENGAGE probe input + Vdc.
SSR PROBE STATUS CONNECTOR (block 5, 5-way)
This connector is used for SSR probe status outputs.
• Terminal 20: Not connected.
• Terminal 21: Not connected.
• Terminal 22: Normally closed (N/C) (closed = probe seated).
• Terminal 23: Common connection.
• Terminal 24: Normally open (N/O) (closed = probe triggered).

HSI-C installation guide
2.6
HSI-C basics
SSR PROBE TYPE AND EXTERNAL LED CONNECTOR (block 6, 5-way)
This connector is used for SSR probe type outputs and external LED (LED or buzzer).
• Terminal 25: External LED 0 Vdc.
• Terminal 26: External LED 10 Vdc.
• Terminal 27: Normally closed (N/C) (closed = RENGAGE probe selected).
• Terminal 28: Common connection.
• Terminal 29: Normally open (N/O) (closed = standard probe selected).
SSR
The SSR is configured as follows:
Normally closed (N/C)
or
Normally open (N/O).
Maximum current is ±50 mA.
Maximum voltage is +30 Vdc.
NOTE: Change of state debounce time is 25ms±5 ms. Debounce time is the time delay between the
HSI-C 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 N/C
Status N/O

2.7
HSI-C basics
Probe inhibit function
The probe 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 probe 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. Alternative methods of selecting the
inhibit function are listed below:
+12 Vdc to +30 Vdc M-code (machine electrical output) connected directly to
the HSI-C
When using this method, it is recommended that the HSI-C is connected as shown in the following
diagram. Alternatively, pin 11 (INHIBIT RETURN) on block 3 may be linked to pin 12 (0 Vdc) on block
3, rather than to the 0 Vdc circuit within the machine's CNC controller (common 0 Vdc only).
An M-code is used to activate the inhibit function. The M-code must supply a constant voltage of
between +12 Vdc and +30 Vdc to pin 10 (INHIBIT) on block 3. To deactivate the inhibit function, the
+12 Vdc to +30Vdc supply must be removed from pin 10 (INHIBIT) on block 3
0 Vdc M-code (machine electrical output) connected directly to the HSI-C
When using this method, it is recommended that the HSI-C is connected as shown in the following
diagram. Alternatively, pin 10 (INHIBIT) may be linked to pin 13 (+12 Vdc to +30 Vdc OUT (fused at
100 mA)) on block3, rather than to the +12 Vdc to +30 Vdc circuit within the machine's CNC controller
(common 0 Vdc only).
An M-code is used to activate the inhibit function. The M-code must supply a constant 0 Vdc to pin11
(INHIBIT RETURN) on block 3. To deactivate the inhibit function, a constant voltage of +12 Vdc to
+30Vdc must be applied to pin 11 (INHIBIT RETURN) on block 3.
HSI-C CONTROL CONNECTIONS
(block 3)
10. INHIBIT
11. INHIBIT RETURN
12. 0 Vdc
CNC CONTROLLER
0 Vdc
+12 Vdc to +30 Vdc M-code
HSI-C CONTROL CONNECTIONS
(block 3)
10. INHIBIT
11. INHIBIT RETURN
13. +12 to +30 Vdc OUT
(fused at 100 mA)
CNC CONTROLLER
0 Vdc M-code
+12 Vdc to +30 Vdc

HSI-C installation guide
2.8
HSI-C basics
M-code (machine electrical output) driven relay contact
When using this method, it is recommended that the HSI-C is connected as shown in the following
diagram. Shorting together pin 12 (0 Vdc) and pin 11 (INHIBIT RETURN) on block 3 (less than 100W)
will force the output into a seated state, irrespective of actual probe status, and remove power from
the probe. Breaking contact between pin 11 and pin 12 (greater than 50 KW) will remove the inhibit
function.
M-code (machine electrical output) driven open collector
When using this method, it is recommended that the HSI-C is connected as shown in the following
diagram. An M-code is used to activate the inhibit function.
HSI-C CONTROL CONNECTIONS
(block 3)
M-code
driven
Relay contact
12. 0 Vdc
11. INHIBIT RETURN
10. INHIBIT
13. +12 to +30 Vdc OUT
(fused at 100 mA)
HSI-C CONTROL CONNECTIONS
(block 3)
M-code
driven
Open collector
12. 0 Vdc
11. INHIBIT RETURN
10. INHIBIT
13. +12 to +30 Vdc OUT
(fused at 100 mA)

2.9
HSI-C basics
Config. 3 override function
The config. 3 override function provides the capability for the connected probe to switch to config.3
during a probing cycle, regardless of the selected PROBE CONFIG switch position. The config. 3
override function is activated by an M-code.
• When a standard probe is connected, the filter (6 ms nominal) is enabled.
• When a second-generation MP250 (with C marking, see figure below) is connected, level 3 (high
false trigger immunity) is enabled.
The config. 3 override function is not compatible for application with first-generation MP250.
There are several methods to apply an M-code to select the config. 3 override function, as described
below.
+12 Vdc to +30 Vdc M-code (machine electrical output) connected directly to
the HSI-C
When using this method, it is recommended that the HSI-C is connected as shown in the following
diagram. Alternatively, pin 6 (CONFIG. 3 OVERRIDE RETURN) on block 2 may be linked to pin 7
(0Vdc) on block 2, rather than to the 0 Vdc circuit within the machine's CNC controller (common 0 Vdc
only).
An M-code is used to activate the config. 3 override function. The M-code must supply a constant
voltage of between +12 Vdc and +30 Vdc to pin 5 (CONFIG. 3 OVERRIDE INPUT) on block 2. To
deactivate the config. 3 override function, the +12 Vdc to +30Vdc supply must be removed from pin 5
(CONFIG. 3 OVERRIDE INPUT) on block 2.
Second-generation MP250
with C identification marking
on probe body
CNC CONTROLLER
0 Vdc
+12 Vdc to +30 Vdc M-code
CONFIG. 3 OVERRIDE CONNECTIONS
(block 2)
5. CONFIG. 3 OVERRIDE INPUT
6. CONFIG. 3 OVERRIDE RETURN
7. 0 Vdc

HSI-C installation guide
2.10
HSI-C basics
0 Vdc M-code (machine electrical output) connected directly to the HSI-C
When using this method, it is recommended that the HSI-C is connected as shown in the following
diagram. Alternatively, pin 5 (CONFIG. 3 OVERRIDE INPUT) may be linked to pin 8 (+12 Vdc to
+30Vdc OUT (fused at 100 mA)) on block2, rather than to the +12 Vdc to +30 Vdc circuit within the
machine's CNC controller (common 0 Vdc only).
An M-code is used to activate the config. 3 override function. The M-code must supply a constant
0Vdc to pin6 (CONFIG. 3 OVERRIDE RETURN) on block 2. To deactivate the config. 3 override
function, a constant voltage of +12 Vdc to +30Vdc must be applied to pin 6 (CONFIG. 3 OVERRIDE
RETURN) on block 2.
M-code (machine electrical output) driven relay contact
When using this method, it is recommended that the HSI-C is connected as shown in the following
diagram. Shorting together pin 7 (0 Vdc) and pin 6 (CONFIG. 3 OVERRIDE RETURN) on block 2 (less
than 100W) will activate the config. 3 override function. Breaking contact between pin 7 and pin 6
(greater than 50 KW) will remove the config. 3 override function.
CONFIG. 3 OVERRIDE CONNECTIONS
(block 2)
M-code
driven
Relay contact
8. +12 to +30 Vdc OUT
(fused at 100 mA)
7. 0 Vdc
6. CONFIG. 3 OVERRIDE RETURN
5. CONFIG. 3 OVERRIDE INPUT
CONFIG. 3 OVERRIDE CONNECTIONS
(block 2)
CNC CONTROLLER
0 Vdc M-code
+12 Vdc to +30 Vdc 5. CONFIG. 3 OVERRIDE INPUT
6. CONFIG. 3 OVERRIDE RETURN
8. +12 to +30 Vdc OUT
(fused at 100 mA)

2.11
HSI-C basics
M-code (machine electrical output) driven open collector
When using this method, it is recommended that the HSI-C is connected as shown in the following
diagram. An M-code is used to activate the config. 3 override function.
CONFIG. 3 OVERRIDE CONNECTIONS
(block 2)
M-code
driven
Open collector
8. +12 to +30 Vdc OUT
(fused at 100 mA)
7. 0 Vdc
6. CONFIG. 3 OVERRIDE RETURN
5. CONFIG. 3 OVERRIDE INPUT

HSI-C installation guide
2.12
HSI-C basics
HSI-C dimensions
107.0 (4.21)
Dimensions given in mm (in)
113.6 (4.47)
99.0 (3.90)
22.6 (0.89)