*The ISI scanner interface is a 37-pin D shell connector (J1), located on the ISI module. The
Start signal until it is safe to do so.
or 33. Only connect these pins to isolated switch or relay contacts in the scanner.
Signal Operation Description *J1 Pin
Numb
er
Voltage Logic
Scanner
Ready
This is an input signal from the
scanner to the injector. It tells the
injector that the scanner is ready. This
signal ensures that the injector cannot
be armed unless the scanner is ready.
This signal is used to prevent a
condition where you could receive
contrast media but no scan.
When the signal is high, it
allows the injector to arm. If the
user wants to arm the injector,
and this signal is low, the
injector cannot be armed.
25 If +5v is switched from pin 16
to 25 by the scanner, the
injector can be armed. If pin
25 is zero volts, the injector
cannot be armed.
Injector
Disarm
This is an input signal from the
scanner to the injector. It allows the
scanner to stop the injection at any
time by disarming it. This signal would
immediately stop the injection of
contrast.
If the injector is armed (this
signal would be high), making
this signal go to zero disarms
the injector.
25 Note that pin 25 performs a
dual function. If it is high
(+5v) the injector is allowed
to arm. If it goes low (0v), it
will disarm the injector.
Start Injector
Request
This is an input signal from the
scanner to the injector. It allows the
scanner to request that the injector
start injecting. If the injector is armed,
and the scanner initiates a "Start
Request", fluid will be delivered,
otherwise the signal is ignored.
The signal from the scanner is
normally low. When it goes
high, the "Start Request" is sent
to the scanner.
27 Pin 27 is normally at 0v.
When the scanner switches
the isolated 5v from pin 16 to
pin 27, the "Start Request" is
made.
Injector
Ready
This is an output signal from the
injector to the scanner indicating the
injector is armed or holding. When the
scanner is initiating the entire
scanning sequence, this signal is used
to notify the scanner that the injector is
ready to accept a start or has entered
a "hold" phase. The injector will start
when receiving a "Start injector
request."
An injector Ready signal is sent
to the scanner once the injector
is armed.
1 & 2 The scanner provides a
signal on pin 2 of J1. When
the injector is armed, this
signal is switched back to
the scanner through pin 1.
The signal is low while
injecting.