OPTIONAL ACCESSORIES
3
Pilot Lights, Optional Accessory 9
These pilot lights, if furnished, are connected and
installed in the enclosure door, or are supplied loose for
open type switches. Each neon light requires a 1/2”
diameter round hole and can be installed in panels up to
0. 1” thick. See the Wiring Diagram. Acc. 9s can be
added later in Kit form. Kit voltage must be the same as
RC Switch control voltage (coil).
Acc. 9A
light comes on when main contacts are closed.
Acc. 9B
light comes on when main contacts are open.
A resistor is used for 208–277 V RC control. It is supplied
on a terminal block with connections labeled 1, 2.
Acc.
Description
Kit
9A
110–120 V
333270–006
9A
208–277 V
333270–007
9B
110–120 V
333271–006
9B
208–277 V
333271–007
Auxiliary Contacts, Optional Accessory 14
Acc. 14 auxiliary contacts are installed on the right side of
the ASCO 920. Terminals accept wire size #14 AWG Cu.
Acc.
Description
Kit
14A
14B
two auxiliary contacts (14A & 14B)
with bracket, cam, and screws
607039
Auxiliary Relays, Optional Acc. 47, 48, 49
Optional auxiliary relays (Acc. 47, 48, 49) are useful:
– When the control station is located at a distance great-
er than allowable ASCO 920 line run (Table A, page 1).
– When controlling device doesn’t have adequate cur-
rent–carrying capability to control RC (Table B, page 1).
– When the controlling device is a single–pole single–
throw contact, which requires a 2–wire control line.
– When Form 3 (start–stop) control is required.
The relays have a low VA burden: Acc. 47 has 3.0 VA for
ac, 2.5 watts for dc; Acc. 48 & 49 have 2.0 VA for ac, 1.2
watts for dc. Acc. 47 & 48 terminals accept wire sizes
#22–12 AWG Cu; Acc. 49 accepts #18–12 AWG Cu.
The relays are mounted and wired to the RC on enclosed
switches, or supplied loose with open type switches.
Two–Wire Control, Optional Accessory 47
Acc. 47 is an auxiliary relay panel for 2–wire control of
the ASCO 920, The relay panel must be energized to
close the ASCO 920 contacts, and de–energized to open
the ASCO 920 contacts. Therefore, use a single–pole,
maintained–type control station (Acc. 53B or 53C).
Order
Catalog 32lA40
and specify relay coil voltage.
Three–Wire Control, Optional Accessory 48
Acc. 48 is an auxiliary relay panel for 3–wire control of
the ASCO 920. It has two relays. One relay must be
energized to open the ASCO 920 contracts; the other
relay must be energized to close the ASCO 920 contacts.
Therefore, use a single–pole, double–throw, momentary–
type control station (Acc. 53A). Order
Catalog 321A36
and specify relay coil voltage. See the Wiring Diagram.
Form 3 Control, Optional Accessory 49
Acc. 49 is an auxiliary relay for Form 3 control of the
ASCO 920. This relay must be energized to close the
ASCO 920 contacts; the relay must be de–energized to
open the ASCO 920 contacts. Therefore, use one
normally open and one normally closed separate control
stations (Acc. 53D). Order a mounting socket kit and
plug---in relay listed below (specify relay control voltage).
Acc.
Description
Kit
49
mounting socket kit
295855
Acc.
AC
Control
Relay
Acc.
DC
Control
Relay
49A
24 V
115206 49F
12 V
115274
49B
120 V
115201 49G
24 V
115277
49C
208 V
115210 49H
32 V
115279
49D
240 V
115202 49I
48 V
115283
49E
277 V
115213 49J
110 V
115271
Control Line Fuses, Optional Accessory 52
These control line fuses are mounted for enclosed
switches, or are supplied loose for open type switches.
Fuse block has #10–32 terminal screws. The cartridge
fuses are suitable for ac only as listed on
Wiring Diagram
.
Acc.
Description
Kit
52A
one 15 amp, 300 Vac type SC fuse
for 300 Vac max. grounded
333272
52B two 15 amp 300 Vac type SC fuses
for 300 Vac max. ungrounded
333273
52C two 15 amp 600 Vac type KTK fuses
for 301---600 Vac max. ungrounded 333274
Door–Mounted Controls, Optional Acc. 53
These manual controls are connected and mounted on
the enclosure door, or are supplied loose for open type
switches. See the
Composite Wiring Diagram
.
Acc.
Description
Kit
53A
momentary toggle switch
with center–off position
for 3–wire control
333275
53B
3–position selector switch (HOA)
used with Acc. 47
for 2–wire control
333276
53C
maintained toggle switch
used with Acc. 47
for 2–wire control
333277
53D
2 momentary toggle switches
(1 normally closed, 1 norm. open)
used with Acc. 49 for form 3 control
333278
