Electrical Connections - Renishaw T101 Installation Manual

Electrical connections

TONiC grounding and shielding
Ti/TD interface
Readhead
Inner shield
Outer shield
IMPORTANT: The outer shield should be connected to the machine earth (Field Ground). The inner shield
should be connected to 0 V at receiving electronics only. Care should be taken to ensure that the inner and
outer shields are insulated from each other. If the inner and outer shields are connected together, this will
cause a short between 0 V and earth, which could cause electrical noise issues.
NOTE: Maximum cable length between readhead and Ti/TD interface is 10 m
Recommended signal termination
Digital outputs
Readhead
A B Z+
Cable Z
0
A B Z-
Standard RS422A line receiver circuitry.
Capacitors recommended for improved noise immunity.
Single ended alarm signal termination (Ti options A, B, C, D)
Interface
100R
E-
4k7
TONiC RSLM/RELM installation guide
Extension cable max.
50 m dependent upon
output frequency
0 V
Customer
220 pF
electronics
= 120R 120R
220 pF
0 V
5 V
Customer
4k7
electronics
1k8
100nF
Analogue outputs
Customer
electronics
V V V
0 1
5 V
Output
signals
V V
0 1
0 V
Limit output (
5 to 24 V
V V P Q
p q
*Select R so maximum current does not exceed 20 mA.
Alternatively use a suitable relay or opto-isolator.
Remote CAL operation (Analogue versions only)
CAL
0 V
TD interface resolution switching
Pin 10
0 V
+
2
120R
V -
2
)
No limits on TD interfaces
R*
All Ti/TD interfaces include a push button switch to enable CAL/AGC
features. However, remote operation of the CAL/AGC is possible via
pin 14 of analogue Ti0000 interfaces. For applications where no
interface is used, remote operation of CAL/AGC is essential.
Connect pin 10 to 0 V to switch to lower resolution.
14