MAR7000
6
1/2013, P/N 01757 Rev. B
Output Connections
Switched (Relay) Common and Relays
CAUTION
Relays are for Class-2 voltages (24 VAC) only.
Do not connect line voltage to the relays!
Connect the device under control between the
desired output terminal and the related
SC
(Switched Common for relays)
. For the bank of
three relays, there is one Switched (relay) Common
.)
Connect the SC terminal to the
PHASE side of 24 VAC.
Power Connection
The MAR7000 requires an external, 24 volt, AC
power source. Use a Class-2 transformer to supply
power. Connect the transformer’s
neutral
lead to
the 24 VAC
Common/–/C
terminal and the AC
phase
lead to the 24 VAC
Phase/
~
/R
terminal. (See
Terminals and Connections on page 6
.) Power is
applied to the MAR7000 when the transformer is
powered.
Powering only one controller/thermostat from
each transformer is recommended. If installing
a MAR7000 in a system with other controllers/
thermostats powered from a single transformer,
however, phasing must be correct and the total
power drawn from the transformer must not
exceed its rating.
Relay 3
(
or 6
)
SC 1–3
(
or 4–6/7
)
Relay 2
(
or 5
)
Relay 1
(
or 4/7
)
One Switched
Common
Connection
Per Bank of
Three
Normally
Open Relays
Do not attach a device that draws current
exceeding the MAR7000’s output capacity.
Maximum output current is 1 A for individual
relays @ 24 VAC/VDC or a total of 1.5 A per bank
of 3 relays
(relays 1–3 and 4–6). Relays are
NO,
SPST (Form “A”)
.
+B
–A
IN4
IN3
GND
IN2
Common/–/C
Phase/ /R
(
Not connected
)
SC 7
(~24 VAC)
(
Not connected
)
Relay 7
(VENT)
Relay 6
(HUM)
SC 4–6
(~24 VAC)
Relay 5
(W2)
Relay 4
(Y2)
Relay 3
(O/B | W1)
SC 1–3
(~24 VAC)
Relay 2
(Y1)
Relay 1
(G)
Relay Outputs
(Wir
ing Cutout in Bac
kplate)
MS/TP
Network
Inputs
24 VAC
(Wiring is
dependent on
application)
(
HP | AC
)
*(Not Connected
in Initial Release)
**
*
*
*
IN9
IN8
GND
IN7
+B
–A
IN4
IN3
GND
IN2
Common/–/C
Phase/ /R
(
Not connected
)
SC 7
(~24 VAC)
(
Not connected
)
Relay 7
(VENT)
Relay 6
(HUM)
SC 4–6
(~24 VAC)
Relay 5
(W2)
Relay 4
(Y2)
Relay 3
(O/B | W1)
SC 1–3
(~24 VAC)
Relay 2
(Y1)
Relay 1
(G)
Relay Outputs
(
HP | AC
)
(Wir
ing Cutout in Bac
kplate)
MS/TP
Network
Inputs
24 VAC
(Wiring is
dependent on
application)
Inputs
NOTE: IN1 is the room
temp. sensor AI1
NOTE: SC = Switched
(Relay) Common
IP/Ethernet Network
(Optional)
(3 Input)
(6 Input—CO
2
Model Terminals Are Rotated)
Terminals and Connections
Label
Function (6 Input Models with CO
2
)
Object
(Internal)
Space CO
2
Sensor
AI10
(IN9)
(Unused)
AI9
(IN8)
Remote Motion Sensor
AI8
(IN7)
Discharge Air Temp. (DAT)
AI7
(Internal)
Occupancy Status (Motion Sensor)
BI6
(Internal)
Space Humidity Sensor
AI5
IN4
Outside Air Temp. (OAT)
AI4
IN3
(Unused)
AI3
IN2
Fan Status (FST)
AI2
(Internal)
Space Temperature Sensor
AI1
VENT
Ventilation
BO7
HUM
Dehumidification
BO6
W2
Heat 2
BO5
Y2
Cool 2
BO4
W1 or O/B
Heat 1 (AC) or Reversing Valve (HPU)
BO3
Y1
Cool 1
BO2
G
Fan
BO1
NOTE: AI8 0-3 VDC contact closure
0 = Closed
3 = Open
