Red-lion LEGEND Manuel d'utilisateur télécharger pdf (Page 54)

Line Filters for input power cables:

Schaffner # FN610-1/07 (RLC #LFIL0000)

Schaffner # FN670-1.8/07

Corcom #1VB3

Corcom #1VR3

Note: Reference manufacturer’s instructions when installing a line filter.

5. Long cable runs are more susceptible to EMI pickup than short cable runs.

Therefore, keep cable runs as short as possible.

6. Switching of inductive loads produces high EMI. Use of snubbers across

inductive loads suppresses EMI.

Snubbers: RLC #SNUB0000

WIRING CONNECTIONS

The bottom board has a removable terminal block (TBA) on the left where the

power connections are made. The plug-in relay board also has a removable

terminal block and is located at the bottom right of the unit. The top board has a

removable terminal block (TBC) where the signal inputs, User Inputs, solid state

outputs, and serial communications connections are made. When wiring the unit,

remove the terminal block and use the numbers on the top label to identify the

position number with the proper function. All conductors should meet voltage

and current ratingsfor each terminal.Also cabling should conformto appropriate

standards of good installation, local codes and regulations. It is recommended

that power supplied to the unit (AC or DC) be protected by a f use or circuit

breaker. Strip the wire, leaving approximately ¼" bare wire exposed (stranded

wires should be tinned with solder). Insert the wire into the terminal and tighten

down the screw until the wire is clamped in tightly. Each terminal can accept up

to two 18-gage wires. After the terminal block is wired, install it in the proper

location at the rear of the unit. Wire each terminal block in this manner.

A.C. POWER WIRING

The AC poweris connected to the bottomleft terminalsTBA 1 & 2 marked AC

PWR. The voltage selector switch, located at the side of the unit, is used to select

the proper voltage. The switch is a slide movement type and can be set by using a

small screwdriver. If the switch is toward the front of the unit, it is set for 115

VAC input. If the switch is towards the rear of the unit, it is set for 230 VAC

input. The switch is in the 230 VAC position when shipped from the factory.

Note: Before applying power to the unit make sure the A.C. power switch is set

for the proper voltage setting.

To reduce the chance of noise spikes entering the AC line and affecting the unit,

the AC powershould be relatively “clean” and within thespecified ±10% variation

limit. Connecting power from heavily loaded circuits or circuits that also power

loads that cycle on and off, (contactors, relays, motors, etc.) should be avoided.

DC POWER WIRING

The DC power is connected to the bottom left terminals TBA 3 & 4 marked +12

VDC and common. The DC power source must be capable of supplying the unit’s

rated current (250 mA) and be within the specified ±20% variation limit. It is not

necessary to provide battery backup to retain programmable information.

The Legend Plus h as non-volatile memory and information is stored on power

down (Refer to b lock diagram).

SERIAL COMMUNICATIONS

Refer to the Serial Communications section of the manual, for wiring and

operational procedures.

USER INPUT WIRING

Programmable external user inputs are digital inputs that are active when

connected to TBC #3 Common. Theuse of shielded cable is recom mended. Follow

the Additional EMC Installation Guidelines for shield connection.

OUTPUT WIRING

RELAY CONNECTIONS

To prolong contact life and suppress electrical noise interference due to the

switching of inductive loads, it is good installation practice to install a snubber

across the contactor. Follow the manufacturer’s instructions for installation.

Note: Snubber leakage current can cause some electro-mechanical devices to be

held ON.

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Red-lion LEGEND Manuel d'utilisateur Page 54

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