IMET M880 Series, User Manual, Page: 16 / 56

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7.6. Basic functions board PCB201 (DC) / PCB231 (AC) (Service card)
The table below shows the basic functions available on the service board.
The SAFETY-ENABLE on the 9-relay board can be activated only by the ones present on the board
itself.
7.7. Connection diagrams of H receivers
The receiving unit version H is provided with 7 slots, where control relay cards, analog output cards
and a data feedback card can be inserted. The basic functions/controls in the table above are located
in the SERVICE board.
The basic receiver configuration includes the power supply board with the relay card on SLOT B, the
logic card on SLOT RX and the SERVICE card on the SERVICE slot.
According to the project specifications, you may have:

RELAY cards (8 + SAFETY, 10 and 13)

MOSFET cards (8 + SAFETY, 10 or 12)

Analog output card

Data feedback card (PCB262) to be inserted in slot A
The configuration HAC does not allow for the use of 13-relay cards, due to the presence of the AC
transformer.
Relay Function Typical Uses Remarks
TIMED-
RELAY
The relay is activated for 5 seconds from the moment
the radio remote control is switched off or has entered
in passive emergency mode.
The T-RELAY can be activated at switch-off or with a
2-second delay.

Delayed STOP of
combustion engine

Engine deceleration
SAFETY-
ENABLE
The relay is activated only by an unstable command
from a toggle switch, button or joystick
When
Connected in series ,
the function introduces a
redundancy that can be used to increase function
safety

Enables the drain valve

Common enabling of control
commands
Relays constantly
monitored by uP.
E-STOP The two relays are activated when the radio remote
control is switched onwith the START button (STOP
RELAY with PLe cat. 4 ISO13849-1) and stay active
until a STOP command intervenes (pressing the
STOP button or passive emergency)

Powers the main contactor
in the machine’s control box

Common power supply for
control commands

Machine power supply
Relays constantly
monitored by uP
HORN Horn control relay Warns of potentially hazardous
situations it can be associated
to the first START
START START control relay Powers the machine’s control box
and enables the machine Start
function