Installation Instructions

Document No. 546-14401
Installation Instructions
February, 2004
CAUTION:
The LRC DOs control 24 Vac loads only. The maximum rating is 12 VA for each DO. Use an interposing
220V relay module (P/N 550-054) for VA requirements higher than the maximum, 110 or 220 Vac
requirements, DC power requirements, or whenever a separate transformer is used to power the load.
Consult with the local representative if terminations are missing or are different.
NOTE:
Consult with the local representative if terminations are missing or are different.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
24 V-AC
RX
TX
FLN TRUNK
+
- S
BST
RTS
DO1
NO C
DO2
NO C
DO3
NO C
DO4
NO C
DO5
NO C
DO6
NO C
AI5
+
-
DI2
DI6
AO1
+
-
AO2
+
-
AO3
+
-
AI3
+ -
AI4
+
-
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
C H EGND
EGND
LEGEND
FACTORY
WIRED
+ -
FIELD
WIRED
CURRENT
POSITION
VOLTAGE
POSITION
VOLTAGE/CURRENT
SWITCHES
ALARM SWITCH (OPTIONAL)
OCCUPANCY SWITCH (OPTIONAL)
ALARM HORN
(OPTIONAL)
SPARE DOs
*
V I
SUPPLY VENTURI
AIR VALVE SIGNAL
GENERAL 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
-
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
CONFIRM AI3 AND AI4
DIP-SWITCH SETTINGS
ON CIRCUIT BOARD
UNDER CTLR COVER
*
ROOM TEMPERATURE
SENSOR
AVS 2
EXHAUST
AVS 1
SUPPLY
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
TEC2438WDR5
APPLICATION
2438
See Figure 9 for how to wire a 4-20 mA sensor at AI 4 (optional).
Figure 8. Application 2438 Wiring Diagram for LRC (550-264B) with Onboard AVS.
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.
Page 6 of 7 Siemens Building Technologies