Cooper Lighting S280-79-10 DISCRETE INTERFACE (DIF), ACCESSORY, Information, Customer Connection

!

SAFETY FOR LIFE

S280-79-10

DISCRETE INTERFACE (DIF)

ACCESSORY

The Discrete Interface (DIF) module accessory (Figure

25)permits connection of contact-type input devices (switches, relays) and discrete indicating devices (relays, LEDs, lamps) to the Form 5 control to effect local discrete input/output (I/O). The DIF module accessory is used for supplementing normal local controls and status indicators for discrete SCADA functions. All DIF inputs and outputs have been factory-set and are shown in Figure 27.

IMPORTANT: Do not use DIF module for overcurrent protection. Digital SCADA can be used for this applica- tion. The control gives priority to TCC timing and issuing a trip signal rather than changing the status of a DIF output or responding to a DIF input.

The DIF module contains 12 factory-set inputs and outputs for discrete SCADA functions. Each Form 5 control can accommodate two DIF modules.

Whetting voltage for the DIF inputs can be supplied by the DIF module or by the customer as shown in Figure 26.

Note: 28 Vdc (nominal) is provided from the DIF module via connector P5 for use as whetting voltage for inputs to P4. As an alternative, the user can supply whetting voltage from an auxiliary source, such as a RTU.

The input voltage range is 12 to 120 Vac or Vdc. The 12 outputs are Form C relay contacts. Six of the module outputs are latching and the other six are non-latching.

Note: Latching is defined as an output that retains its status when control power is removed.

Non-latchingis defined as an output that changes its status when control power is removed.

Note: A remote function is not controlled by the SUPERVISORY BLOCKED switch.

Customer Connection

Information

!	CAUTION: Equipment damage. Do not drill con-
	nection holes into the top of the cabinet. Connec-

tion holes in the top of the cabinet will allow moisture to seep into the control and damage the components or cause control misoperation. Failure to comply will void

!	CAUTION: Equipment damage; misoperation.
	External leads must be shielded and the shield

must be grounded at both ends. Terminate each lead with a 320 Vac, 160 Joules metal oxide varistor (MOV), or equivalent, at the remote end. Attach MOVs between the leads and ground. Failure to properly shield and protect leads can result in equipment damage and/or

unintentional operation.						G117.3
		INPUT COMMON
					4
			28V (–)		3	P5
			28V (+)
					2
		OUTPUT COMMON				WHETTING
					1
						VOLTAGE
			6		12
					11
			5		10
					9
			4		8
					7	P3
			3		6
					5	UNLATCHED
	DISCRETE		2		4	OUTPUTS
					3
	INTERFACE
			1		2
	MODULE				1
	ACCESSORY
				12	12
					11
					10
				11
					9
					8
				10		P2
					7
					6	LATCHED
				9	5	OUTPUTS
					4
				8	3
					2
				7	1
		12
		11			12
					11
		10
					10
		9
					9
		8
					8
		7
					7	P4
		6
					6
		5				INPUTS
					5
		4				(12 TO 120
					4
		3				VAC OR VDC)
					3
		2				WHETTING
					2
		1				VOLTAGE
					1

Figure 25.

Discrete Interface (DIF) Module.

P5

INPUT COMMON

4

the control’s factory warranty. T249.0

28V (-)

28V (+)

3

Figure 25 shows the customer-supplied wiring of whetting voltage for DIF module inputs. Connection is made from terminal P5 on the DIF module to the respective connections on P4 inputs 1 through 12.

Figure 27 shows customer connections to the DIF outputs at P2 and P3.

2

OUTPUT COMMONCustomer-Supplied

1

Wiring for Whetting Voltage

Note: Wiring to P5-2 and P5-3 can be	REMOTE
	CONTACTS
reversed if necessary.

To P4

Inputs 1 thru 12

Figure 26.

Customer connections for supplying whetting voltage to DIF inputs.

23