Rockwell Automation 1771-PD PID MODULE (+DU) - Manual (Page 21)

Assembly and Installation
Chapter 2
2Ć8
5. Choose the tieback input 1 as voltage or current.
If tieback input 1 is wired to track the manual control station associated
with analog output 1, then both tieback input 1 and analog output 1 must
be selected to the same mode of either current or voltage.
6. Choose analog input 2 as voltage or current.
7. Choose analog output 2 as voltage or current.
8. Choose tieback input 2 as voltage or current.
If tieback input 2 is wired to track the manual control station associated
with analog output 2, then both tieback input 2 and analog output 2 must
be selected to the same mode of current or voltage.
9. Choose compliance as standard or additional.
Compliance is defined as the maximum allowable load impedance in the
current mode. The standard compliance for the PID module is 500 ohms.
Additional compliance can be established for one or two loops, only if
analog outputs 1 and 2 and tieback inputs 1 and 2 are all selected for the
current mode.
(The condition on tieback inputs is required only when they are tracking
outputs.) Additional compliance allows a maximum load impedance of
1250 ohms. Additional compliance is obtained by internally referencing
the MODULE COMMON terminal to the -15V dc terminal. Choose
standard or additional compliance and record in Table 2.C. The choice
may affect the power supply requirement for input devices as described in
section titled External Connections.
10. Choose the source of +5V dc as either the backplane or external
supply.
11. Review all the choices made in table 2.C before continuing.