
4101-2 Modular Controller
3-9
Controller case at one end only. Signal Earth not required. If the
Comms module is plugged into this Controller then connect CONN2
to both the Comms module and to CONN2 of next Controller - see
Comms module installation note.
Pin
Function
Connection
No connection
connect cable screens to Controller case
RX
R
to RX on Controller, TX on Comms module
RX
Receive -
to RX on Controller, TX on Comms module
TX
Tr
to TX on Controller, RX on Comms module
TX
Transmit -
to TX on Controller, RX on Comms module
0V
Signal Earth
no connection to Signal Earth required
Note
: to pass emission regulations, the RS485 cable must pass
through the ferrite sleeve provided, see the chapter on “Earthing and
screening”.
Master/slave connection (no Comms module)
:
Connect CONN2 RX, RX , TX and TX pins on the master Controller
to their opposite pins on the slave Controller. Connect cable screens
to Controller case at one end only. Signal Earth not required.
Pin
Function
Connection
No connection
connect cable screens to Controller case
RX
R
connect RX on master to TX on slave
RX
Receive -
connect RX on master to TX on slave
TX
Tr
connect TX on master to RX on slave
TX
Transmit -
connect TX on master to RX on slave
0V
Signal Earth
no connection to Signal Earth required
Note
: to pass emission regulations, the RS485 cable must pass
through the ferrite sleeve provided, see the chapter on “Earthing and
screening”.
CONN3
Function
: general connections. The POWER and STATUS LEDs and
TAMPER switch for the cover are already connected when you receive
the Controller. Each function uses two terminals on the connector.
Pin
Function
POWER LED
Indicates power on motherboard via LED visible through cover.
STATUS LED
Indicates processor running via flashing LED visible through cover.
TAMPER
Input indicating cover is opened. Connected to switch on cover. Can
also be connected in parallel to switch on power supply unit cover.
Input is normally open circuit. Short circuit indicates cover removed -
alarm sent to computer.
PSU MON
Input indicating mains failure. Input is normally closed circuit. Open
circuit indicates mains failure - alarm sent to computer.
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