Varec 2920 - Setting Optional Outputs as NC or no; Wiring Limit Switches

4 Wiring
Varec, Inc. 49
Setting Optional Outputs as NC or NO
Each of the four discrete outputs on the AC Power Supply circuit board can be set to operate
as Normally Closed (NC) or Normally Open (NO). A jumper connector determines the setting
for each output, as shown in the following figure and in the table below the figure.
To set each output, push the jumper onto the NC and center pins for NC operation, or onto the
NO and center pins for NO operation.
Note Outputs are set to NC at the factory.
Wiring Limit Switches
Each of the optional SPDT limit switches can be wired for Normally Open (NO) or Normally
Closed (NC) operation by using the appropriate terminals:
• Under normal operating conditions, the Normally Closed (NC2) and Common (COM1)
terminals of the limit switch are connected. The Normally Open (NO3) and Common
(COM1) terminals of the limit switch become connected as the switch arm rides up
the cam, as shown in the following figure.
Output Jumper
1J2
2J4
3J5
4J6
D5
U1
NO
J2
NC
D6
K1
D4
K2
K3
D7 D8
K4
C4
S3
GT2
D2
D3
J8
S2
J3
S1
NO
J6
NC
NO
J5
NC
NO
J4
NC
D1
8
1
1
4
AC Power Fuse
(80 mA)
J6
NO/NC Jumper
for Output 4
J5
NO/NC Jumper
for Output 3
J4
NO/NC Jumper
for Output 2
J3
Discrete Outputs
1 - 4
J2
NO/NC Jumper
for Output 1