Eurotherm 2208e Manuel d'utilisateur télécharger pdf (Page 3)

PDSIO setpoint input

PDSIO can be used to digitally

transmit the setpoint profile from

a 2404/08 to a number of slave

Series 2200e or 2400 controllers.

If any slave zone departs from the

required setpoint by more than a

pre-settable amount, a signal from

any slave can be transmitted back

to the master causing the program

to freeze until the error is

corrected. Digital accuracy is

preserved using PDSIO.

PDSIO Setpoint transmission

PDSIO Load diagnostic

PDSIO Load diagnostics

PDSIO (Pulse Density Signalling I/O)

is a major innovation in the

2204e/2208e. When used in

combination with a Eurotherm

TE10 solid state relay (SSR), it

allows the logic output of a

2204e/2208e to transmit the power

demand signal and simultaneously

read back load fault alarms.

These alarms will be flashed as

messages on the controller front

panel.

Two alarm conditions will be

detected, either SSR failure

indicating an open or short circuit

condition in the SSR and heater

circuit failure indicating either fuse

failure, heater open circuit or line

supply absent.

PDSIO mode 2 will monitor load

current and display value, giving an

alarm if current is out of limits.

(PDS Heater Break Detect)

Supply

PDSIO 2-wire

Connection

Heater

TE10 Solid

State Relay

Slave Controllers

(PDS Input) (PDS Input)

(PDS Output)

PDSIO Master

Setpoint Transmission

Master Setpoint

Generator

1 2 3 4 5 6 7 8

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