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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
EN2B-0285GE51 R0909
22
Terminal Block Assignment and Wiring Example for the W7754 Controller
Table 13 lists the terminals and their functions of the Excel 10 W7754 FCU Controller. Table 14 lists wiring information for all
possible actuator types.
Table 13. W7754 Controller: Overview of terminals and functions (by model)
model
terminal
#
function
K L M N P
1+2 receiving/sending data on the LONWORKS network; removable plug 3 3 3 3 3
3
a digital input, configurable (using the LNS plug-in) to read input e.g. from a
window contact, an occupancy sensor, etc.
3 3 3 3 3
4
an analog input, permanently configured to read input from a wall module's
temperature setpoint adjustment knob
3 3 3 3 3
5
an analog input, permanently configured to read input from a room temperature
sensor
3 3 3 3 3
6 GND serving terminals 4, 5, 9, 10, and 11 3 3 3 3 3
7 not used -- -- -- -- --
8 GND serving terminal 3 3 3 3 3 3
9
a digital output, permanently configured to write output switching the wall module's
LED ON/OFF
3 3 3 3 3
10
an analog input, permanently configured to read input on whether the wall
module's 3-speed fan control knob has been set to AUTO, OFF, LOW, MEDIUM,
or HIGH and whether the wall module's "occupancy override" button has been
pressed
3 3 3 3 3
11
(1)
a digital input, permanently configured to read input on whether a window contact
is "open" or "closed"
3 3 3 3 3
12 not used -- -- -- -- --
13+14
relay 4, permanently configured to write output to a hardwired electrical reheat
coil, switching it ON/OFF
-- -- -- -- 3
15 a common terminal for terminals 16, 17, and 18 3 3 3 3 3
16
(2)
relay 3, permanently configured to write output to a three-speed fan, setting it to
HIGH
3 3 3 3 3
17
(2)
relay 2, permanently configured to write output to a three-speed fan, setting it to
MEDIUM
3 3 3 3 3
18
(2)
relay 1, permanently configured to write output to a three-speed fan, setting it to
LOW
3 3 3 3 3
19 a triac output, permanently configured to write output to OUT1, closing it -- -- -- -- 3
20 a triac output, permanently configured to write output to OUT1, opening it -- 3 -- 3 3
21 a triac output, permanently configured to write output to OUT2, closing it -- -- -- -- 3
22 a triac output, permanently configured to write output to OUT2, opening it 3 3 -- 3 3
23 a common terminal for terminals 19 and 20 3 3 -- 3 3
24 a common terminal for terminals 21 and 22 3 3 -- 3 3
25 "N" terminal of power supply (24 Vac or 230 Vac, respectively); removable plug 230 24 230 230 230
26 "L" terminal of power supply (24 Vac or 230 Vac, respectively); removable plug 230 24 230 230 230
(1)
This digital input can be enabled / disabled using the right DIP switch located on the top of the controller.
(2)
If all three relays (terminals 16, 17, and 18) are switched OFF, the three-speed fan will likewise be switched OFF.
Additionally, the W7754K1001 features an extra socket (located to the left of the terminal blocks) containing a digital output
suitable for attachment to a solid-state relay employed for low-voltage PWM control in high-current electrical reheat applications.
Using Honeywell's LNS plug-in, you can configure the controller's triac outputs and relay outputs for a variety of different
functions. E.g. the triac outputs can be configured for connection to either a floating drive or to a thermal actuator. Once the
outputs have been configured, the corresponding devices can be directly connected to them.