Johnson Controls C-7355 User manual

Master Catalog 125
Clocks Section C
Product/Technical Bulletin C-7355
Issue Date 0795
© 1995 Johnson Controls, Inc. 1
Part No. 24-7664-427 Rev. —
Code No. LIT-216135
The C-7355 Electromechanical Series of 7-Day Time Clocks
provides an economical control solution for automatic
On/Off switching of equipment. Electromechanical time
clocks are available in the following types: C-7355-7 (1
channel with a synchronous drive motor) and C-7355-8 (1
channel with quartz stabilized movement and battery
reserve).
The C-7355 Electromechanical Series uses heavy duty
single-pole/double-throw (SPDT) contacts (rated 21 amps
at 240 VAC resistive) to switch line voltage loads. Up to 12
two-hour On/Off events per day can be programmed.
Figure 1: C-7355 Electromechanical Series Time Clock
Features and Benefits
❑Economical Cost Makes time-of-day control affordable
❑Front-mount Terminal Block Reduces wiring and installation time
❑Heavy Duty Switch Rating Allows larger loads to be switched
❑Manual 3-way Override Allows for permanent On or Off status
❑Battery Backup Retains settings upon loss of power (C-7355-8 only)
C-7355 Electromechanical
Series 7-Day Time Clocks

2 C-7355 Electromechanical Series 7-Day Time Clocks Product/Technical Bulletin
Introduction
The C-7355 Electromechanical Series 7-Day Time Clocks
turn equipment On and Off according to a user-defined,
time-of-day schedule, which is set by adjustable On/Off
captive trippers.
The C-7355-7 is an electromechanical style time clock with
a synchronous drive motor. The C-7355-8 is an
electromechanical style time clock with quartz stabilized
movement. The C-7355-8 also has a built-in Ni-Cad battery
that will maintain clock operation and switching schedules
for up to 150 hours in the event of a power failure.
Theory of Operation
The C-7355 Electromechanical Series switches a load On
and Off during programmed events. The NO and COM
output terminals are open during programmed Off events
and are switched closed during programmed On events.
Terminal
Base
Guide
Pins Electromechanical Time
Clock
Housing
Terminal
Cover Break-away Tabs
for DIN
Rail Mounting
(One on each side.)
Clear
Cover
Captive
Screw
Captive
Screw
Mounting Holes
(One not shown
on lower
right corner.)
I
0
Figure 2: C-7355 Electromechanical Series 7-Day Time Clock

C-7355 Electromechanical Series 7-Day Time Clocks Product/Technical Bulletin 3
Supplies Needed
•drill
•3/16 in. (5 mm) drill bit
•screwdriver
•blunt-nose pliers
•marking pencil
•wire stripper
Product Dimensions
2-13/16
72
4-1/16
103
I
0
Figure 3: C-7355 Front View (in./mm)
2-1/16
52
4-1/16
103
Figure 4: C-7355 Side View (in./mm)

4 C-7355 Electromechanical Series 7-Day Time Clocks Product/Technical Bulletin
Installation and Wiring
DIN Rail Mounting
Use the following instructions to mount the time clock on a
standard 35 mm DIN rail.
1. Remove the clear cover from the front of the time clock.
2. Using a screwdriver, loosen the two captive screws
located in the upper right and lower left corners of the
housing. See Figure 2.
3. Remove the housing by pulling forward.
4. Using blunt-nose pliers, remove the break-away tabs
from the housing. See Figure 5.
5. Remove the terminal cover by pulling forward.
6. Snap the time clock onto the DIN rail.
7. Make wiring connections (refer to Wiring section).
Remove the appropriate knockouts on the terminal
cover for wire entry. See Figure 6.
8. Replace the terminal cover and housing, tighten the
captive screws, and replace the clear cover.
Figure 5: Removing DIN Rail Knockouts
Figure 6: Removing Wire Entry Knockouts
Surface Mounting
Use the following instructions to mount the time clock on a
flat surface. The time clock is not position sensitive and can
be mounted in any orientation. However, vertical mounting
is recommended to aid in programming.
1. Remove the clear cover from the front of the time clock.
2. Using a screwdriver, loosen the two captive screws
located in the upper right and lower left corners of the
housing.
3. Remove the housing by pulling forward.
4. Remove the terminal cover by pulling forward.
5. Use the mounting template (Figure 10) or place the
terminal base against the desired mounting surface and
mark the location of the two mounting holes along the
bottom of the terminal base. (See Figure 2.)
6. Drill two 3/16 in. (5 mm) holes at the marked locations,
tap the provided anchors flush with the wall surface,
and fasten the terminal base to the wall with the two #6
screws provided.
7. Make wiring connections (refer to Wiring section).
Remove the appropriate knockouts on the terminal
cover for wire entry. See Figure 6.
8. Replace the terminal cover, and housing; tighten the
captive screws; and replace the clear cover.
Enclosure Mounting
If an enclosure is required, see Table 3: Ordering
Information. Follow the instructions included with the
enclosure.
Wiring
!
WARNING: Shock Hazard. Disconnect all
power supplies before wiring
connections are made to avoid
electrical shock or possible
damage to the equipment.
1. Wire the time clock according to national and/or local
electrical codes. Terminals will accept 10 to 24 AWG
copper wire. See Figures 7 and 8.

C-7355 Electromechanical Series 7-Day Time Clocks Product/Technical Bulletin 5
2. Insert the wires in the screw-down terminal in
accordance with the terminal designations in Table 1.
3. Tighten the screw-down terminals to secure the wires.
M
12345
Load
L1
Neutral
COM NO NC
C-7355
120
VAC
Figure 7: Typical C-7355 Line Voltage Wiring Diagram
M
12345
Load
L1
Neutral
COM NO NC
C-7355
120
VAC
24 to
240
VAC
Figure 8: Typical C-7355 Wiring DiagramSwitching
Voltage Other than 120 VAC
Table 1: C-7355 Terminal Designations
Terminal Number Description
1 L1 (120 VAC)
2 Neutral
3 COM (output common)
4 NO (switched output)
5 NC (switched output)
Programming
Overview
The C-7355 Electromechanical Series Time Clocks have a
clock face with minute and hour hands. The dial face shows
the seven days of the week and a.m./p.m. markings for each
day.
Setting the Current Time and Day
IMPORTANT: Turn the dial face and minute hand in the
clockwise direction only. Turning the
wrong way may damage the time clock.
To set the current day and time, turn the outer dial clockwise
until the current day of the week is aligned with the triangle
marker on the inner dial. Then turn the minute hand
clockwise until the current time of day is aligned with the
triangle marker on the inner dial. The hour and minute
hands will then show the current time of day. See Figure 9.
I
0
Ring of
Captive
Trippers
Triangle
Marker
Manual
Override
Switch
Figure 9: C-7355 Electromechanical Series Dial Face

6 C-7355 Electromechanical Series 7-Day Time Clocks Product/Technical Bulletin
Setting On/Off Events
The dial face shows the seven days of the week and the
a.m./p.m. markings for each day. Each day contains 12
captive trippers. Each tripper represents a 2-hour block of
time. Up to 84 On/Off events can be programmed per week.
Push the captive trippers to the outer ring position for the
entire period of time that the load is to be turned On. Push
the captive trippers to the inner ring position for the entire
period of time that the load is to be turned Off.
Manual Override
The manual override switch can be positioned to allow
automatic, permanent On, or permanent Off control. See
Figure 9.
When the manual override switch is in the automatic
position “ ”, the time clock switches the load On and Off
according to the programmed events.
When the manual override switch is in the permanent On
position “I”, the time clock turns the load On and overrides
all programmed events. The clock remains
in the On position until the manual override switch is placed
in the automatic or permanent Off position.
When the manual override switch is in the permanent Off
position “0”, the time clock turns the load Off and overrides
all programmed events. The clock remains in the Off
position until the manual override switch is placed in the
automatic or permanent On position.
Power Failures
In the event of a power failure, the C-7355-7 does not
operate. The time and day of the unit must be reset once
power is restored.
The C-7355-8 uses a built-in Ni-Cad battery for backup. In
the event of a power failure, the outputs are disabled but the
time clock maintains clock operation and programmed
events for up to 150 hours.
Repair Information
Field repairs must not be made. For a replacement time
clock, contact the nearest Johnson Controls representative.
Troubleshooting
Table 2: Troubleshooting
Symptom Possible Cause Corrective Action
Clock does not
function…Supplyvoltage is incorrect Use a voltmeter to check the voltage between terminals 1 and 2. Voltage
should be between 102 and 132 VAC.
Load does not switch
correctly…Time clock wiring is incorrect Refer to the Wiring section for correct wiring of the time clock.
Manual override switch is in the Off
(0) position Place the manual override switch in the automatic position.
Damaged contacts Use an ohmmeter to check the resistance difference of the switch terminals.
Position the manual override switch to “I”. The resistance between the COM
and NO contacts should be less than 1 ohm. The resistance between the
COM and NC contacts should be infinity. Place the manual override switch
to the “0” position. The resitance between the COM and NO contacts should
be infinity. The resistance between the COM and NC contacts should be less
than 1 ohm. If the resistance is incorrect, replace the unit.
Clock time is off by
more than what is
specified…
120 VAC line frequency is not 60 Hz
(C-7355-7 only) Contact the power company to correct the line frequency (C-7355-7 only).
Quartz unit failure (C-7355-8 only) Replace the unit (C-7355-8 only).

C-7355 Electromechanical Series 7-Day Time Clocks Product/Technical Bulletin 7
Ordering Information
Table 3: Ordering Information
Item Product Code Number
Electromechanical Time Clock, 1 Channel, Synchronous Drive Motor C-7355-7
Electromechanical Time Clock, 1 Channel, Quartz Stabilized Movement with BatteryBackup C-7355-8
Metal Indoor Enclosure BOX-7355-1
Mounting Template
The mounting template shown in Figure 10 can be used
when surface mounting a C-7355 time clock.
2-3/8
60
2-1/8
54
Figure 10: Surface Mounting Template (in./mm)

8 C-7355 Electromechanical Series 7-Day Time Clocks Product/Technical Bulletin
Specifications
Product C-7355-7 Electromechanical Time Clock, 1 Channel, Synchronous Drive Motor
C-7355-8 Electromechanical Time Clock, 1 Channel, Quartz Stabilized Movement
Power Requirements C-7355-7: 120 VAC +10%, -15%, 60 Hz
C-7355-8: 120 VAC +10%, -15%, 50/60 Hz
Switching Capacity Maximum: 21 amps resistive @ 240 VAC
Maximum: 2 hp (12 amps inductive) @ 240 VAC; 1 hp (16 amps inductive) @ 120 VAC
Minimum: 100 mA@ 20 VAC
Output Type SPDT
Power Consumption 1 VA
Clock Accuracy C-7355-7: ±24 minutes/year (based on 60 Hz line frequency)
C-7355-8: ±10 minutes/year
Battery Backup C-7355-8: 150 hours
Shortest Switching Time 2 hours
Set Points 84 events per week
Wire Gauge 10 to 24 AWG
Mounting Surface, 35 mm DIN rail, or Enclosure
Ambient Operating
Temperature C-7355-7: -4°F to 150°F (-20°C to 66°C)
C-7355-8: -4°F to 131°F (-20°C to 55°C)
Ambient Storage Temperature C-7355-7: -20°F to 185°F (-29°C to 85°C)
C-7355-8: -20°F to 150°F (-29°C to 66°C)
Ambient Humidity 0 to 95% RH, non-condensing; 85°F (20°C) maximum dew point
UL Recognized Grasslin File E83486
Canadian UL
Recognized Grasslin File E83486
Dimensions (H x W x D) 4-1/16 x 2-13/16 x 2-1/16 in. (103 x 72 x 52 mm)
Shipping Weight C-7355-7: 0.37 lb (0.168 kg)
C-7355-8: 0.39 lb (0.178 kg)
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, consult the
local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting frommisapplication or misuse of its products.
Controls Group
507 E. Michigan Street
P.O. Box 43
Milwaukee, WI 53201 Printed in U.S.A.