Medrad ProVis Mark V, Руководство по обслуживанию

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Imaging System Interface
14 - 5
Injector Start Input This input, at J40 pins 7 and 9, is used to start the injector from the
Imaging System. This connection is the same as other hard-wired start
switches. To start the injector after it has been armed, provide a switch
or a pair of normally open, isolated relay contacts. The contacts must
remain closed during the entire injection. Opening these contacts dur-
ing the injection will result in the termination of the injection.
CAUTION : Do not apply voltage to J40 pins 7 or 9.
Equipment damage or malfunction may result.
Injecting Output
Circuit The purpose of this output signal is very similar to that of the Injection
Duration Output. The Injection Duration output is a voltage to an exter-
nal monitor, while the injecting output is a relay closure to an Imaging
System.
Inverter U3B and relay K2, comprise the Injecting Output Circuit. This
“injecting” output from the injector, indicates when an injection is occur-
ring, and is useful for timing, synchronization, and as a status indicator.
Relay contacts of J40 pins 1 and 2, are open during standby, including
when the injector is armed but not injecting. The contacts are closed
during an injection, and open when the volume limit is reached, or the
start switch is opened. Relay contact rating is 28 VDC, at 1 amp.
Armed Output
Signals J40 pins 3 and 4, provide an Armed output signal, or an Extended
Armed Output signal as detailed below. At installation, switch S3 or
jumper JU2A is used to select the appropriate signal: The purpose of
this signal is to alert the film changer or Imaging System that the injec-
tor is armed and ready to inject, before initiating the filming sequence.
Switch S3 or jumper JU2A is used to select either the “Armed” or
“Extended Armed” output from pins 3 and 4 of J40.
Armed Output Signals
Inverter U3C and relay K1 comprise the armed output circuit. The sig-
nal at J40 pins 3 and 4, indicates when the injector is armed. The relay
contacts are open when disarmed, or closed when single or multiple
armed, regardless of start switch status. The injector must be armed
before any injection can start. Relay contact maximum rating is 28
VDC, at 1 amp.
Extended Armed Output
This output uses the Armed Output Signal relay contacts. When the
injector is “armed”, the contacts close, giving an indication to the imag-
ing system that the injector is ready to inject. When the injection is com-
plete, and the start switch (or external start lines) remain closed, the
Extended Armed relay will remain closed, allowing the imaging system
to complete the filming sequence. Although the Extended Armed Out-
put remains active with the start lines closed, the Safe Relay will de-
energize when a single bolus injection is complete. Relay contact max-
imum rating is 28 VDC, at 1 amp.
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