8.2.2 Varian Emergency STOP Interlock
Specifications
Intended use is to connect the ExacTrac system directly to the linac emergency OFF circuit if a
V
arian linac with 3rd party motion interface is present.
Component Description
Cabling
Brainlab supplies a shielded 9pole SUB-D extension cable with max. 30 m
(cable 8a) to connect between the linac stand and the ExacTrac
cabinet
(1.0).
Emergency OFF re-
quirements
You are responsible to fulfill local regulatory requirements with the emer-
gency OFF installation.
The timing requirements for motion stop are met with this installation.
Interface on the Ex-
acT
rac system cab-
inet
Signalization logic
In case of emergency OFF, the Varian linac de-energiz-
es the signal within the cable, which is detected by the
ExacTrac system.
Interface on Exac-
Trac
system cabi-
net
Connector type 9pol SUBD standard components
Galvanic separa-
tion
The Varian ILK interface on Brainlab’s side is separat-
ed according to IEC 60601-1 for S.F
.C: 250V AC (elec-
trical safety of medical devices)
Example Circuit for ExacTrac Connection to TrueBeam Linac
Exactrac cabinet
Truebeam LINAC
ET Electronics Rack
ET ILK Insert
Interface
Connector
"J15"
(SUBD9)
Cable
8a
VARIAN ILK Connector
EMO
+ MEL_HW
ET
Adapter
Figure 37
SYSTEM INTERLOCKS AND STATUS SIGNALS
Site Planning Manual Rev. 1.0 ExacTrac Ver. 6.x 83
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