4
Terminal Connections
Wiring Routing Rules
The following table shows cable types that can be routed together:
Cable Screens
Earth each screen, but at only one end of the cable network, preferably
at the GND terminal (14) of an MN50-MI-NCP/ARC. If earthing a
screen at an MN650 controller, connect to terminal 40 (GND). Keep
wires emerging from screened cable as short as possible (and not
more than 150mm).
Note: Satisfactory NCP or ARCNET communications relies on the LAN
REF potential varying no more than 12V between any two devices in
the network (e.g. between an MN50-MI-NCP/ARC and any controller,
or between any two controllers). If this is not the case, introduce NCP
repeaters or ARCNET routers and connect the network as given in the
MicroNet System Engineering Guide
.
Network Wiring
Introduction
Network wiring includes a connection between the controller and a
MicroNet controller network. Depending on the specific controller
model, one of two network types can be used:
•
NCP network
•
ARCNET network
Note that termination of cable screens can be critical to performance,
particularly in an ARCNET network. Network wire pairs must be
dedicated to MicroNet network communications. They cannot be part
of an active, bundled telephone trunk. If network cable is installed in
areas of high RFI/EMI, the cable must be in conduit.
Refer to the
MicroNet System Engineering Guide
for further guidance,
including network topologies, wiring, network lengths, termination,
screening and cable types.
NCP Network Wiring
MN650-NCP VARIANT
Controllers may be networked to either a 'main LAN' under an
MN50-MI-NCP or to a 'sub-LAN' under a MicroNet Touch Screen.
Recommended cable for NCP networks is Belden 9502 dual
twisted-pair screened cable for full opto-isolation in areas of high
electrical noise. However, Belden 8762 (single twisted pair cable) can
be used providing that the wiring precautions shown in the
MicroNet
System Engineering Guide
are followed.
The terminals to use for network connections depend on whether or not
a Touch Screen is mounted on the controller.
1.
Review the Precautions section.
2.
If applicable, fit or remove two links as shown in the following
diagram:
PT No. 3/08455100_0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
24V
24V
24V
24V
24V
24V
24V
24V
24V
24V
24V
24V
24V
24V
24V
24V
24V
GND
DO1
DO2
DO3
DO4
DO5
DO6
DO7
DO8
DI1
DI2
DI3
DI4
DI5
DI6
DI7
DI8
57 58 59 60 61 62 63 64 65 66 67 68
UI1
UI2
UI3
UI4
UI5
UI6
UI7
UI8
UI9
UI10
UI11
UI12
UI1 COM
UI2 COM
UI3 COM
UI4 COM
UI5 COM
UI6 COM
UI7 COM
UI8 COM
UI9 COM
UI10 COM
UI11 COM
UI12 COM
18 19 20 21 22 23 24 25 26 27 28 29
69 70 71 72
LAN A
LAN A +
LAN B
LAN B +
LAN A REF
LAN A REF
LAN B REF
LAN B REF
30 31 32 33
73 74 75 76 77 78
AO1
AO2
AO3
AO4
15V
dc
S-LINK
AO1 COM
AO2 COM
AO3 COM
AO4 COM
0V
dc
S-LINK
34 35 36 37 38 39
1 2 3 4 5 6 7
8 9 10 11 12 13 14 15 1
6 17
18 19 20 21 22 23
24 25 26 27 28 29
30 31 32 33
34 35 36 37 38 39
40 41 42 43 44 45 46 4
7 48 49 50 51 52 53 54 5
5 56
57 58 59 60 61 62 63 6
4 65 66 67 68
69 70 71 72 73 74 75 76 77 78
Terminals accept one 1.5mm
2
wire
Terminals 1 to 17 are internally linked.
Comms
a
S-Link
DI (24V)
UI
AO
DO 24Vac
DO 240Vac
Comms
a
a
Comms must always be screened.
9
9
9
9
9
8
8
S-Link
9
9
8
9
9
8
8
DI (24V)
9
8
9
9
b
b
Screen UI
9
c
9
8
UI
9
9
9
b
9
9
9
b
8
AO
9
9
9
c
c
Screen AO
9
9
9
c
8
DO 24Vac
8
8
9
9
b
9
c
9
8
DO 240Vac
8
8
8
8
8
8
9
Screens.
Use a terminal block if you
have more than one screen
to earth at the controller.
40 (GND)
