Controller Board Overview; Table 1 Controller Board Components - Emerson Autochangeover Controllers AC8 User Manual

1.7

Controller Board Overview

The AC8's controller board has connectors for eight digital inputs, four analog inputs, eight digital
outputs, two control relay outputs and an EPOP contact input, as shown below. The board comes com-
plete with light emitting diodes (LEDs) to display the status of connected devices, a battery pack for
short-term backup, communications ports, power connections and other features necessary to control
your operation.
A - Power
On/Off switch
HH - Transformer
Module
GG - 24VAC power
connector
FF - Battery pack
connector
EE - LCD contrast
adjustment
DD - LCD
connector
CC - DIP switch 1
BB - Modem
status LEDs
AA - Modem
Z - 24VAC
connector
Y - Power On/Off
switch
X - Power
receptacle
W - Phone
V - Serial
line
interface
connector
connector
(RS232/EIA574)
Table 1 Controller board components
Item
A - Power On/Off Power switch for the controller board. When switched off, the battery
switch pack is disabled.
Provides battery backup during a power loss to maintain normal
B - Battery pack operation of the panel for a minimum of 10 minutes. The analog inputs
will not be functional during a power loss (P/N 133455P1).
C - EIA422 LEDs Indicates the connection status between the AC8 and SiteScan Web.
D - Audible horn Provides audible notification when an alarm occurs.
E - Audible horn
Jumper to disable the audible horn (factory default is enabled).
jumper
The two common alarm connections are used to connect to a secondary
warning device such as a horn, light or Building Management System
F - Common Alarm
(BMS). When an alarm is present, the contacts close and the external
connectors
warning device is activated/notified. The common alarm contacts may
be configured to be reset with the Silence button/command.
G - Digital output Each output has an LED to indicate its status: ON/OFF (energized/de-
status LEDs energized).
Each of the two output connections is a two-state point: ON/OFF
H - Control relay (energized/de-energized). Digital and analog inputs may be mapped to
outputs either or both relays to trigger change in state.
An example of a control relay output point is a humidity lock-out.
Placing the switch in the ON position will turn ON, or energize, all eight
I - Manual Override outputs simultaneously. This switch removes all automatic output control
Switch (outputs) from the AC8.
The factory default is OFF (outputs controlled by programming).
B - Battery
pack
TB7:
START
24V INPUT
P23:
BATTERY
BATTERY
LCD
CONTRAST
VBATT
ON
MODEM
J11: PHONE
PIN 3-TIP
PIN 4-RING
U - EIA485
T - SiteScan
connector
Web
connector
(EIA422)
Description
C - EIA422
D - Audible
LEDs
horn
TB5: COMMON ALARM
RELAY OUTPUTS
NO C NC NO C NC
BOTTOM
LS1
+
ENABLE
P11 TOP
AUDIBLE
Q11
TP1
GND
ON ON DIP
OUTPUT1
DS56
S2 OUTPUT2
DS54
DS63 OUTPUT3
1 2 3 4 5 6 7 8
OUTPUT4
OFF DS61
OUTPUT5
DS60
OUTPUT6
DS62
DS55 OUTPUT7
DS57 OUTPUT8
DS59 CTRLLOCK
DS83
CAN TX DS58 SENLOCK
DS84 CMN ALR
CAN RX DS53
MOP
F PROG
574 TX
574 RX
485 RX
485 TX
INPUT1
INPUT2
INPUT3
DS70 INPUT4
DS67 INPUT5
DS66 INPUT6
DS65 INPUT7
DS64 INPUT8
R334
C71
MODEM
EPOP INPUT
1-2 TOP
3-4 BOTTOM
P19
DIS EN
485
+
(TOP) — + +
— —
422 AG TB9: ANALOG TB1, TB2 INPUTS:
+ + GROUND
(BOTTOM) + — — DRY CONTACTS ONLY.
—
S - 12VDC/
R - Analog
24VDC analog
input
input jumper
connectors
4
F - Common
E - Audible horn
Alarm
jumper
connectors
G - Digital output
status LEDs
H - Control relay
(TOP) TB3, TB4, TB5 outputs
OUTPUT RELAY
RATINGS: 24V, 3A
CLASS 2 ONLY.
I - Manual
TB4:
Override Switch
(BOTTOM)
(outputs)
NC
NC
C
C
NO
NO
2
J - Digital out-
RELAY
put connectors
OUTPUTS
(BOTTOM)
(TOP)
8
4
K - Status LEDs
7
3
6
2
5
1
L - Digital output
(BOTTOM)
loss-of-power
(TOP)
8
4
7 jumper
3
6
2
5
1
M - Digital input
TB2:
CONTACT
connectors
INPUTS
TB1
EPOP
N - Digital input
EPOP
TB1: EPOP
CONTACT
status LEDs
INPUT
O - EPOP
contact input
Q - Analog P - EPOP
ground jumper
connector
For more information, see:
2.4: Connect Power to the AC8
2.4.2: Connecting the Battery Pack
7.9.4: Connect Battery
1.8: LED Indicators
N/A
N/A
3.0: Wiring and Connections
3.4: Connecting Common Alarm
Outputs
7.4: Setup System - Setup Common
Alarm
1.8: LED Indicators
3.0: Wiring and Connections
3.2.4: Connecting Control Relay
Outputs
5.9: View Control Status
7.11: Setup System - Setup I/O Matrix
7.12: Override Output
Introduction