Rockwell Automation 440F MatGuard, 440F-C4000 Mat Controllers - Manual (Page 33)

Connecting the mats to 440F-C28013 control unit
Fig. 27a Terminating unused mat connections and connecting mats
If less than 8 mats are to be connected to the control unit, the other connections must be terminated with
the shorting plugs supplied. The required mats should be connected in sequence (1 to 8) to the quick
connect adaptors located on the outside of the unit. Terminate unused connectors by un-plugging fitted
connectors and replacing with shorting plugs as shown in Fig. 27a.
5. AUXILIARY OUTPUTS: This terminal provides auxiliary N/C contacts (i.e. Closed when the MACHINE
ENABLED light is OFF) suitable for indication or alarm devices. THEY MUST NOT BE
CONNECTED TO THE SAFETY CIRCUIT. NOTE: MGCSM1 and MGCSM4 offer N/C and N/O contacts.
6. SAFETY OUTPUTS: These are volt free terminals for connection to the machine safety circuit i.e..
They are connected in series with the machine contactor control circuit (max rating 250V 4A). They
should be externally protected by a suitably rated fuse(s). For ONE CONTACTOR use terminals 13 & 24
with terminals 14 & 23 linked.
For TWO CONTACTORS with two independent control circuits (i.e. a dual channel system), use 13 & 14
for connection to one contactor control circuit and 23 & 24 to the other.
See figs. 14/15 and 16/17 in section 5 for examples of typical interfacing with the machine control circuit.
NOTE: The safety outputs should be connected directly via hard wiring to the machine primary control
elements (contactors). They must not be connected via any elements e.g. ordinary relays, PLCs, etc. not
suitably specified for safety related functions.
7. CONTACTOR MONITORING: The control unit is provided with these terminals linked. When the link is
removed they can be connected to positively guided N/C auxiliary contacts on the machine
contactors to provide monitoring of the contactors in dual channel control systems. If one contactor fails
to isolate the power at de-energisation of its control coil the mat control unit will not allow the other
contactor to be energised until the fault has been rectified.
8. REMOTE RESET: N/O - These terminals are provided for the connection of a remote reset button.
This MUST be a N/O momentary push button device positioned at a location which gives a full view of
the detection zone.
440F-C4000P, 440F-C4000S, 440F-C28013 only. If there is not also a full view of the hazard zone from
the control unit, disconnect the wires from the reset switch on the control unit lid at the terminal block to
disable the reset function at the control unit.
9. REMOTE RESET INDICATION: If this is used in conjunction with an illuminated push button remote
reset switch, it will show when the mat system needs to be reset. These terminals are for connection to
the bulb (28V).
32
MAT 1
MAT 2
MAT 3
MAT 4
MAT 5
MAT 6
MAT 7
Shorting Plug
MAT 8