Electrical Connections - Renishaw TONiC RESM20 Installation Manual

Electrical connections

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
Remote CAL operation
(Analogue versions only)
CAL
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.
0 V
TD interface resolution switching
Pin 10
Connect pin 10 to 0 V to switch to lower resolution.
0 V
TONiC RESM20 angle encoder system installation guide
Extension cable
Customer
maximum 50 m
electronics
dependent upon
clocked output option
5 V
Output
signals
0 V
Recommended signal termination
Digital outputs
A B Z E+
Cable Z
A B Z E−
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
Analogue outputs
V V V +
0 1 2
120R
V V V −
0 1 2
0 V
Customer
220 pF
electronics
= 120R 120R
0
220 pF
0 V
5 V
Customer
4k7
electronics
1k8
100nF
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