7i80hd + 7i33 + 7i37 + 7i84

Because i can't find how to change the output voltage of 7i33
what settings must change for 0-2.5-5 V analog output ?

You would need to set the PWM channel offset mode true
and bound the PID output to 2.5 (with a PWM scale of 10)

This assumes you are running LinuxCNC 2.8.1 or greater

From these settings linuxcnc.org/docs/html/man/man9/pid.9.html
pid output bound is this?

pid.N.output float out

The output of the PID loop, which goes to some actuator such as a motor.
 

How to bound the PID output to 2.5 what are the settings?

Via the PID maxoutput pin

for example:

setp pid.5.maxoutput 2.5