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Electrical connections
TONiC FS system grounding and shielding
Interface
Readhead
Inner shield
Outer shield
IMPORTANT: The outer shield must be connected to the machine earth (Field Ground). The inner shield
must 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.
NOTES:
X
Maximum cable length between readhead and interface is 10 m.
X
Maximum extension cable is dependent on cable type, readhead cable length and clock speed. Contact
your local subsidiary for more information.
X
For DOP interfaces the external earthing tag on the interface must be used when mounting the interface
on a DIN rail.
Remote CAL operation
CAL
Ti and DOP 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
TONiC RESM20 Functional Safety installation guide and safety manual
Customer
electronics
Extension cable
5 V
Output signals
0 V
Original instructions
Signal termination
Analogue outputs
V
V
V
+
0
1
2
120R
V
V
V
−
0
1
2
Limit output
(Limit output for information only)
5 to 24 V
R*
V
V
P Q
p
q
* Select R so maximum current does not exceed 20 mA.
Alternatively use a suitable relay or opto-isolator.
Digital outputs
Readhead
A B Z E+
Cable Z
= 120R
0
A B Z E−
Standard RS422A line receiver circuitry.
Capacitors recommended for improved noise immunity.
0 V
Customer
220 pF
electronics
120R
220 pF
0 V
21
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