Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 546)

I/O Interface
Section 10A
10A-23
Figure 10A.17 shows a triac output connection diagram.
Figure 10A.17
Triac Output Connection (E151, E152)
Relay type output Relay type output
Solenoid
Noise
suppressor
dc 115 V ac 230 V ac
Noise
suppressor
Noise
suppressor
M M
dc + dc - L1 (H) L2 (L) L1 (H) L2 (L)
Customer supplied Customer supplied Customer supplied
Triac output - Group 1
V ac Common
Triac output - Group 2
V ac Common
A11 V ac A12 A13 A14 A15 A16 V ac B12 B13 B14 B15 B16 NOT
USED
B11
NOT
USED
11322-I
Important: Triac outputs are isolated by means of a photocoupler. They
are also protected from transient current by a varistor.
To reduce leakage current, it may be necessary to connect a load resistor or
additional noise suppressor. When a triac output is connected with a hard
contact to control an inductive load, it is recommended that a varistor be
used. Do not use suppressors having RC networks, since damage to triacs
could occur.
Important: A noise suppressor is not incorporated in the relay type output
circuit (terminals A11, B11).
Connection of an external surge suppressor is recommended to protect the
relay contact from a transient voltage spike, which occurs when an
inductive device is turned off.