CSI MR-AHU, Installation Sheet

Page: 2 / 4

MR-AHU
2 Installation Sheet (TCON154 11/97)
I/STAT, S/STAT and W/STAT Connections
1. Connect the I/STAT, S/STAT, or W/STAT white, red, and
black conductors to TB3 – 1 through TB3 – 3 (Signal, Power,
and Ground) as shown in
Figure4, “I/STAT and S/STAT
Connection” .
2. When connecting an S/STAT connect the blue and yellow
conductors to TB4 – 4 (Input 4). Refer to
Table 2 , “DIP
Switch Configuration Settings”.
Connecting the Sub-LAN
1. Connect the + lead of the twisted pair sub-LAN cable to
terminal TB2 – 1 (LAN+, see
Figure5, “Sub-LAN
Connections” ).
2. Connect the – lead of the twisted pair sub-LAN cable to
terminal TB2 – 2 (LAN –).
3. Shield drain wire continuity must be maintained as the sub-
LAN cable passes through each MR-AHU. Shield drain
wires from each controller sub-LAN cable must be twisted
together, insulated, and tied back such that wires do not
come in contact with ground or any conductive surface.
4. Connect the shield drain wire directly to Electrical Service
Earth Ground at only one end of the cable (e.g., at the MCI,
MRI, or at one MR-AHU).
Note: Refer to “Cable Requirements” in “Specifications” on
page 4 .
Figure 4. I/STAT and S/STAT Connection
1
2
3
4
5
6
TB4
INPUTS
SENSOR
TB3
GROUND
+12V
INPUT 4
INPUT 3
INPUT 2
INPUT 1
INPUT PORT
1
2
3
SIGNAL
POWER
GROUND
I/STAT
PORT
White
Red
Black
Blue
Yellow
S/STAT Only
I/STAT, W/STAT and S/STAT
Figure 5. Sub-LAN Connections
LAN
P1
TB1
TB2
AC PWR
12
12
LAN +
LAN
PORT
LAN –
24V ~
GROUND
PWR