Teledyne Vacuum Gauge 2002 Manuel d'utilisateur télécharger pdf (Page 35)

Model 2002 page 35

Relay Interface Option Board

SECTION 7

The relay interface board is available as an option for the Model 2002. Additionally, relays may

be added to either the Digital option Board (RS-232 or RS-485) or to the Analog option Board

(0-10 Volts or 4-20mA). In either case the relays operate independently of the other options. The

relay board allows the TTL logic setpoints (High, Low) to directly control two SPDT relays.

Whenever the setpoint indicator light in the front panel is lit, the corresponding relay is energized.

The relay contacts are rated for a maximum switching current of 250VA (resistive load). Connec-

tion to the relay contacts is made via connector mounted through the rear panel of the Model

2002. Screw terminals, on the mating connector, are designed for wire from 28 AWG through 14

AW G.

7.1 Relay Board Specifications

Each relay board consists of 2 Form C (SPDT) relays with the contacts wired in parallel.

Max. switching power --------------------------------------------------------------------- 120W, 250VA

(2A @ 125VAC, 1A @ 250VAC)

Max. switching voltage -------------------------------------------------------------- 220VDC, 250VAC

Max. switching current ---------------------------------------------------------------------- 4A DC, AC

Max . carrying current----------------------------------------------------------------------- 6A DC, AC

UL/CSA rating --------------------------------------------------------------------------1.2A @ 125VAC

1.2A @ 110VDC

4.0A @ 30VDC

Figure 7.1

3 2 1

COMMON

Connector for Digital or Analog option,

or dummy connector if no option

is installed

HIGH SETPOINT

RELAY CONNECTOR

3 2 1

LOW SETPOINT

RELAY CONNECTOR

COMMON

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Teledyne Vacuum Gauge 2002 Manuel d'utilisateur Page 35