Справочник Пользователя для Honeywell W7750A
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
43
74-2958—1
Fig. 36. Pneumatic transducer to W7750B,C
(B shown, see triangle note 4).
To use the analog outputs on the W7750C with 2-to-10V
actuators or transducers, a 500 ohm (1 percent or better
tolerance) resistor must be placed across the 2-to-10V
devices input and ground terminal. See Fig. 37. for an
example. The resistor converts a 4 to 20 mA signal into a 2-to-
10V signal.
actuators or transducers, a 500 ohm (1 percent or better
tolerance) resistor must be placed across the 2-to-10V
devices input and ground terminal. See Fig. 37. for an
example. The resistor converts a 4 to 20 mA signal into a 2-to-
10V signal.
NOTE:
Wire the 500 ohm resistor physically as close as
possible to the driven device. If the resistor is located
far away from the driven device, it is possible that
noise will be added onto the 2-to-10V signal to
ground line. This noise could cause an actuator to re-
position (jitter) and reduce the actuators life.
possible to the driven device. If the resistor is located
far away from the driven device, it is possible that
noise will be added onto the 2-to-10V signal to
ground line. This noise could cause an actuator to re-
position (jitter) and reduce the actuators life.
Fig. 37. RP7517,B pneumatic transducer to W7750C.
L
ON
W
ORKS
®
Bus Termination Module
One 209541B Excel 10 FTT Termination Module is required
for a singly terminated L
for a singly terminated L
ON
W
ORKS
Bus segment. Two
209541B Excel 10 FTT Termination Modules are required for
a doubly terminated daisy-chain L
a doubly terminated daisy-chain L
ON
W
ORKS
Bus segment
(see Fig. 38). Refer to L
ON
W
ORKS
Bus Wiring Guidelines
form, 74-2865 for termination module placement rules.
For 209541B Excel 10 FTT Termination module placement
and wiring options, see Fig. 39.
and wiring options, see Fig. 39.
24 VAC
24 (H)
24 (N)
24 (H)
24 (N)
INCREASE
DECREASE
24 VAC
W7750B,C CONSTANT
VOLUME AHU
CONTROLLER
VOLUME AHU
CONTROLLER
MMC325 PNEUMATIC
TRANSDUCER
TRANSDUCER
1
2
3
4
4
MAKE SURE ALL TRANSFORMER/POWER WIRING IS AS SHOWN;
REVERSING TERMINATIONS RESULTS IN EQUIPMENT
MALFUNCTION.
REVERSING TERMINATIONS RESULTS IN EQUIPMENT
MALFUNCTION.
OPTIONAL 24 VAC WIRING TO NEXT CONTROLLER.
USE 1/4 IN (6 MM) PNEUMATIC TUBING. MINIMUM BRANCH LINE
MUST BE 6 FT. (1.8M) OR LONGER.
MUST BE 6 FT. (1.8M) OR LONGER.
TERMINALS 16,17, 18 ARE ANALOG OUTPUTS (W7750C ONLY).
31
30
29
28
27
26
25
24
23
22
21
20
24 VAC COM
19
18
17
16
+
-
3
2
1
OUT 7
OUT 6
OUT 5
OUT 4
OUT 8
OUT 1
OUT 3
OUT 2
DI-2
DI-4
DI-1
DI-3
DI
GROUND
DI
GROUND
PNEUMATIC
VALVE
VALVE
M10078C
M
B
M
24 VAC
24 VAC
W7750C CONSTANT
VOLUME AHU
CONTROLLER
VOLUME AHU
CONTROLLER
RP7517B PNEUMATIC TRANSDUCER
1
2
3
3
ANALOG OUTPUTS FROM W7750C ARE 4 TO 20 mA SIGNALS. A 500 OHM
1% TOLERANCE (OR BETTER) PRECISION RESISTOR IS REQUIRED TO
DRIVE THIS (RP7517B) AND OTHER 2 TO 10V DEVICES. PLACE THIS
RESISTOR AS CLOSE AS POSSIBLE TO THE DRIVEN DEVICE.
1% TOLERANCE (OR BETTER) PRECISION RESISTOR IS REQUIRED TO
DRIVE THIS (RP7517B) AND OTHER 2 TO 10V DEVICES. PLACE THIS
RESISTOR AS CLOSE AS POSSIBLE TO THE DRIVEN DEVICE.
USE 1/4 IN (6 MM) PNEUMATIC TUBING. MINIMUM BRANCH LINE
MUST BE 6 FT. (1.8M) OR LONGER.
MUST BE 6 FT. (1.8M) OR LONGER.
TERMINALS 16 TO 18 ARE ANALOG OUTPUTS (W7750C ONLY).
31
30
29
28
27
26
25
24
23
22
21
20
24 VAC COM
19
18
17
16
+
-
2
1
AO 2
AO 1
BLACK
BLUE
BROWN
OUT 5
OUT 4
AO 3
OUT 1
OUT 3
OUT 2
DI-2
DI-4
DI-1
DI-3
PNEUMATIC
VALVE
ACTUATOR
VALVE
ACTUATOR
500
M17368
RP7517B
1
M
2
B
M
DI
GROUND
DI
GROUND