FSR IT-R4 - Manual (Page 7)

7
Setup
The four relays can be configured as indicated in the relay configuration portion of this table along with their
corresponding relay operation. The label is located on the bottom of the unit. The operation of the relays is
accomplished by combining one of the five inputs of either A, B, C, D or E with a selected setting on a four-
position configuration dipswitch located on the main PCB. Switches S1 through S3 are used for accomplishing
this, while the fourth position is used to control the logic state at which the relays will operate. S4 closed allows
active low inputs to turn on the relay while S4 open allows active high inputs to turn on the relay.
Switch Input Actuation Table
Switch Inputs A-E
Switch Possibilities:
1 = Gnd
0 = +V to operate (2-24V)
24V Max
2V Min
Or
1V Max
-1V Min
24V Max
2VMIn
Control Inputs (A-E) Acceptable Input Level from an
external device that is edge
triggered.
+V
Falling Edge Rising Edge
Configuration /
Mode Dipswitches