Installation Instructions
Document No. 546-14401
Installation Instructions
February, 2004
Wiring Diagrams
CAUTION:
The LRC DOs control 24 Vac loads only. The maximum rating is 12 VA for each DO. Use an interposing
220V 4-relay module (540-147) for any of the following: VA requirements higher than the maximum; 110
or 220 Vac requirements; DC power requirements; separate transformers used to power the load.
NOTE: Consult with the local representative if terminations are missing or are different.
14 15 16 14 15 166 7 8 9 10 11 12 136 7 8 9 10 11 12 13 1 2 3 4 51 2 3 4 5
24 V-AC
BSTTXRX
+
-
DO1
NO C
DO2
NO C
DO3
NO C
DO4
NO C
DO5
NO C
DO8
NO C
DO7
NO C
DO6
NO C
AI5
+
-
DI2
DI6
RTS
AVS 1AVS 2AO3
+
-
AO2
+
-
AO1
+
-
AI3
+
-
AI4
+
-
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 161 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
EGND
LEGEND
FACTORY
WIRED
+
-
FIELD
WIRED
CUR -
RENT
CUR -
RENT
ALARM SWITCH (OPTIONAL)
OCCUPANCY SWITCH (OPTIONAL)
ALARM HORN
(OPTIONAL)
NOT USED
SPARE DOs
SUPPLY VENTURI
AIR VALVE SIGNAL
GEN EXHAUST VENTURI
AIR VALVE SIGNAL
HOT
WATER VALVE
SUPPLY AIR TEMP SENSOR -- OPTIONAL, MONITORING ONLY
(100K THERMISTOR ONLY)
AUTOZERO
MODULE 1
AUTOZERO
MODULE 2
(4-20mA SENSORS REQUIRE A
SEPARATE
ISOLATED POWER
SUPPLY AND ENTIRE CIRCUIT MUST BE
UNGROUNDED)
HUMIDITY SENSOR, OPTIONAL, OR SPARE AI (0-10V or 4-20mA)
OUTPUT
SIGNAL
-
PWR
NOT USED
NOT USED
FUME HOOD 4
FUME HOOD 3
FUME HOOD 2
FUME HOOD 1
(SHIELD
TAPED BACK)
(SHIELD
TAPED BACK)
FUME HOOD
CONTROLLER
1 FUME HOOD
EXTERNAL FIELD CONNECTIONS
OR
2 TO 4
FUME HOODS
FUME HOOD FLOW MODULE
546-00351
TO
24 VAC
CLASS 2
OUTPUT
SIGNAL +
FUME HOOD 4
FUME HOOD 3
FUME HOOD 2
FUME HOOD 1
Y8
Y7
Y6
Y5
G
G0
+
-
X2X4
Y4
Y3
Y2
Y1
Y90
Y91
Y92
X1X3
+
-
AO2 FLOW
OUTPUT
SIGNAL
E
H
C
REMOTE AIR
MODULE
(EXHAUST)
REMOTE AIR
MODULE
(SUPPLY)
SIGNAL
SIGNAL
GND
GND
PWR
AI4 ("SW1")
AI3 ("S1")
BOTH SWITCHES SHOWN
VOLTAGE POSITION
VOLT-
AGE
VOLT-
AGE
*
SUPPLYEXHAUST
NOT IN POINT
DATABASE
S1
SW1
(4-20mA SENSORS REQUIRE SEPARATE POWER SUPPLY AND ENTIRE CIRCUIT MUST BE UNGROUNDED)
*CONFIRM AI3 AND AI4 DIP-SWITCH SETTINGS ON CIRCUIT BOARD UNDER CONTROLLER COVER
2
1
ROOM TEMP
SENSOR
24 V COMMON
24 V HOT
EARTH GROUND
(GREEN OR
GREEN/YELLOW)
EARTH
GROUND
NUT
EARTH
GROUND
NUT
POWER SUPPLY
TERMINAL BLOCK
TO 24 VAC
CERTIFIED CLASS II
TRANSFORMER
SHIELD
FLN
TRUNK
FLN TRUNK
TEC-RAM2438WDR1
+
-
+
-
S
+
-
S
+
-
S
+
-
SS
C
H
GND
APPLICATION
2438
See Figure 9 for how to wire a 4-20 mA sensor at AI 4 (optional).
Figure 7. Application 2438 Wiring Diagram for LRC (550-767A) requiring Remote Air Modules.
CAUTION:
If the LRC is not connected as shown, it is not resistant to electrical surges. It is also
susceptible to interference from other equipment.
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