Logic Inputs; Analog Inputs And Outputs; Accessing Setpoints Via The Front Panel - GE Multilin 750 Quick Reference Manual

Accessing setpoints via the front panel

Logic inputs

Logic inputs are connected as indicated below. Ensure correct polarity and do not connect
any logic input circuits to ground or else relay hardware may be damaged. External
contacts can be connected to the relay's fourteen (14) logic inputs. As shown, these
contacts can be either dry or wet. It is also possible to use a combination of both contact
types.
Dry Contact Connection
750/760 RELAY
+32 V DC
Logic Input 1
32 V DC
DC Negative

Analog inputs and outputs

Analog Inputs and Outputs are connected as indicated in the Typical Wiring Diagram. Also
refer to the figure below. Note that the shield of the cable shall be grounded at one point
only, usually at the PLC/computer end only.
ACCESSING SETPOINTS VIA THE FRONT PANEL
Refer to Chapter 1 750/760 instruction manual for details on changing setpoints. To have
access to the relay setpoints, you must install a hardware jumper across terminals C10 and
C11 at the back of the relay case. Attempts to enter a new setpoint without this electrical
connection will result in an error message. Additional information is provided in the same
section regarding passcodes and accessing information via the serial ports of the relay.
8
Wet Contact Connection
C12
C1
D12
Figure 9: Dry and wet contact connections
Figure 10: Analog output connections
750/760 RELAY
+32 V DC C12
Logic Input 1 C1
32 V DC
DC Negative
D12
750/760 Quick Reference Guide
30 to 300 V DC
LOGICIN.CDR