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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
Interface
A B Z E+
Cable Z
= 120R
0
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)
5 V
Interface
4k7
1k8
100R
E-
4k7
TONiC RGSZ installation guide
Extension cable
maximum 50 m
Customer
dependent upon
electronics
clocked output
option
5 V
0 V
0 V
Customer
220 pF
electronics
120R
220 pF
0 V
Customer
electronics
100nF
Analogue outputs
V
V
V
+
0
1
2
V
V
V
-
0
1
2
Output
signals
Limit output
(No limits on TD interfaces)
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
120R
R*
All Ti and 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.
11
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