Precautions for i/o modules – Toshiba Programmable Controller PROSEC T3 User Manual

Page 64

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3. Precautions for I/O Modules

3.5

Precautions for relay

output modules

(1) The relay output module (R0364, R0363S) needs external 24

Vdc power for driving relays. (For details, see 2.3, I/O module
specifications.)

If external 24 Vdc power is not supplied, the LED (F) in the front

of the module will light.

(2) Because the relay output module does not have an built-in fuse

to protect from overcurrent, install a fuse appropriate to the load

current on the external wire. If the protective fuse is not
inserted, module patterns could be burn out when a load is
shorted.

R0364

(3) The relay output module does not have a built-in surge

absorption element. To connect an inductive load, always install

a surge absorption element in parallel with the load. For details
on selecting a surge absorption element, see 3.3 (5) and 3.4 (3).

PROSEC T3