Ashcroft A Series User manual

Installation and Maintenance Instructions
for Ashcroft A-Series Miniature
Watertight Pressure Switches
INTRODUCTION
The APS and APA pressure switch have NEMA 6, IP 67 Rated
316 stainless steel housing and process connections. The
APS has a factory fixed setpoint which cannot be changed
in the field. The APA is field adjustable and can easily be ad-
justed by following the instructions in the diaphragm above.
ELECTRICAL CONNECTION
The APS and APA switch is available with many various elec-
trical connections. Refer to the figures on other side for wiring
color codes and identification of terminals. Depending on the
configuration, the Micro DIN mating connector may or may
not be supplied with the switch.
• Only trained and skilled personnel are allowed to attach the
wires to the electrical terminals of the switch.
• Cable couplers, glands and conduit connectors must have
the correct electrical approvals as required by local electrical
codes.
• The ground wire/connector is connected to the switch
housing.
• Fully insulated mating spade terminals must be used on all
spade terminal connections to prevent a shock hazard and
maintain compliance with approvals.
MICRO SWITCH RATINGS
CODE VAC RATING VDC RATING
H 5A @ 125/250VAC 5A @ 28Vdc resistive
3A @ 28Vdc inductive
P 3A @ 125VAC 2A @ 30Vdc resistive
G 0.1 A @ 125VAC 0.1A @ 30Vdc resistive
L 1A @125VAC 1A @ 28Vdc resistive
L 1A @125VAC 0.5A @ 28Vdcinductive
© 2022 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. I&M009-10045-10/11 (250-2966) Rev. 03/22
FACTORY SET
ADJUSTMENT
COVER
ROTATE LEFT <––––
TO INCREASE SET POINT
ROTATE RIGHT ––––>
TO DECREASE SET POINT
.095 OR SMALLER TOOL
REQUIRED TO ROTATE NUT
SLIDE COVER DOWN TO ACCESS
SETPOINT ADJUSTMENT. SLIDE COVER
UP TO CLOSE AND SEAL ADJUSTMENT
FIELD ADJUSTABLE
FIELD ADJUSTABLE
ADJUSTMENT
COVER
SLIDE COVER DOWN TO ACCESS
SETPOINT ADJUSTMENT SLIDE COVER
UP TO CLOSE AND SEAL ADJUSTMENT
FACTORY SET
ROTATE LEFT <
TO INCREASE SETPOINT
ROTATE RIGHT >
TO DECREASE SETPOINT
Ø .095 OR SMALLER TOOL
REQUIRED TO ROTATE NUT
SIL 3 CAPABLE
LOOK FOR THESE MARKS
ON OUR PRODUCTS

Installation and Maintenance Instructions
for Ashcroft A-Series Miniature
Watertight Pressure Switches
© 2022 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. I&M009-10045-10/11 (250-2966) Rev. 03/22
1 – COMMON
2 – NORMALLY CLOSED
3 – NORMALLY OPEN
4 – Ground
METRI-PACK
CODE: 00GN
0.90
[22.9]
0.50
[12.7]
[17.3]
Ø 0.63
[15.9]
0.39
[10]
Ø 1.13
[28.6]
0.68
METRI - PACK
CODE: 00GN
AB
C
DEUTSCH DTO-3P
CODE: 00DT
DEUTSCH DT04-3P
CODE: 00DT
A
0.90
[22.9]
0.50
[12.7]
1.01
[25.6]
0.68
[17.4]
0.45
[11.3]
0.60
[15.2]
Ø 1.13
[28.6]
B
C
AMP SUPERSEAL
CODE: 00AP
.90
[22.9]
.50
[12.7]
.96
[24.4]
Ø 1.13
[28.6]
3
2
1
AMP SUPERSEAL
CODE: 00AP
SPADE TERMINALS
GROUND
NC
NO
C
GROUND C
NO
NC
.25 .19
SPADE TERMINALS
(000T)
1.07
.60
.59
1.37
.34
.41
MICRO DIN
(000H) NO CONN.
(001H) WITH CONN.
MATING
CONNECTOR
MICRO DIN CONNECTOR
GROUND
NC
NO
C
GROUND C
NO NC
.25 .19
SPADE TERMINALS
(000T)
1.0
7
.60
.59
1.37
.34
.41
MICRO DIN
(000H) NO CONN.
(001H) WITH CONN.
MATING
CONNECTOR
SPADE PIN FUNCTIONS
PIN # FUNCTION
1 C
2 NO
3 NC
4 GROUND
MICRO-DIN FUNCTIONS
PIN # FUNCTION
1 C
2 NO
3 NC
4 GROUND
DEUTSCH DT04-3P PIN
FUNCTIONS
PIN # FUNCTION
A C
B NO
C NC
AMP SUPERSEAL PIN
FUNCTIONS
PIN # FUNCTION
1 C
2 NO
3 NC
METRI-PACK PIN
FUNCTIONS
PIN # FUNCTION
A C
B NO
C NC

Installation and Maintenance Instructions
for Ashcroft A-Series Miniature
Watertight Pressure Switches
© 2022 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. I&M009-10045-10/11 (250-2966) Rev. 03/22
EN 175301-803 Form C
CODE: 00DC
EN 175301-803 Form C
(DIN 43650, Form C)
CODE: 00DC
1
23
4
0.90
[22.9]
0.54
[13.7]
1.13
[28.6]
0.41
[10.5]
0.08
[2]
0.13
[3.4]
0.34
[8.6]
0.03
[0.8]
EN 175301-803 Form A
CODE: 00DN
2
4
1
3
0.90
[22.9]
Ø 1.13
[28.6]
1.12
[28.5]
0.41
[10.5]
0.25
[6.4]
0.05
[1.3]
0.45
[11.5]
0.33
[8.5]
M27
NUT
EN 17301-803 Form A
(DIN 43650, Form A)
CODE: 00DN
M12
CODE: 00EW
0.90
[22.9]
Ø 1.13
[28.6]
Ø 0.41
[10.5]
0.66
[16.7]
M12
2
1
3
4
M12
CODE: 00EW
0.90
[22.9]
Ø 1.13
[28.6]
Ø 0.41
[10.5]
0.66
[16.7]
M12
2
1
3
4
M12
CODE: 00EW
CONNECTOR JACKETED CABLE WITH
18 AWG WIRES WITHOUT CONDUIT
12˝
0.50
[12.7]
0.90
[22.9]
Ø 1.13
[28.6]
CONDUCTOR JACKETED
CABLE WITH 18 AWG WIRES
WITHOUT CONDUIT
GROUND
NC
NO
C
GROUND C
NO NC
WIRE LEAD (XXXL) CONNECTION
WITH DUAL SWITCH SHOWN
XXX = WIRE LENTH (in.)
Ø
1.13
DIM -A-
DIM -C-
DIM -D-
DIM -B-
7/8 HEX
ADJUSTMENT
COVER
(APA ONLY)
1.16
1/2NPT
CONDUIT
CONDUIT (XXXC)
XXX = WIRE LENGTH (in.)
1˝ HEX
GROUND
NC
NO
C
GROUND C
NO NC
CONDUIT (XXXC)
XXX = WIRE LENGTH (IN.)
WIRE LEAD (XXXL) CONNECTION WITH DUAL SWITCH SHOWN
XXX = WIRE LENGTH (IN.)
WIRE COLOR/FUNCTION
WIRE COLOR SWITCH FUNCTION
RED SW1 NC
WHITE SW1 C
BLUE SW1 NO
WHITE/BLACK SW2 C
RED/BLACK SW2 NC
BLUE/BLACK SW2 NO
GREEN — GROUND
M12 PIN FUNCTIONS
PIN # FUNCTION
1 C
2 NO
3 NC
4 GROUND
EN 175301-803 FORM A
PIN FUNCTIONS
PIN # FUNCTION
1 C
2 NO
3 NC
4 GROUND
EN 175301-803 FORM C
PIN FUNCTIONS
PIN # FUNCTION
1 C
2 NO
3 NC
4 GROUND

For the name and location of the nearest sales
representative, contact the Stratford Office.
Ashcroft Inc.
250 East Main Street
Stratford, CT 06614
Tel: [phone]
Fax: [phone]
www.ashcroft.com
© 2022 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. I&M002-10038-10_00(250-3129) Rev. 03/22
INSTALLATION
• To minimize the risk of injury, the switch enclosure must be
selected according to the area classification and installed
according to the required safety and electrical codes.
• Torque should always be applied to the Hex portion of the
body, never to any other part of the body for it may alter
the setpoint. It is recommended that Teflon tape or other
sealant be used on the threads prior to installing to prevent
leaks in the system.
• The ambient temperature limits for the switches are –40° to
100°C (varies with seal ordered).
• Switch should be protected from excessive shock and
vibration.
• The cover of the APA switch should be closed at all times
when the switch is in operation.
CAUTIONS
• Always close the cover of the APA switch after making any
setpoint adjustments.
• Do not exceed current or voltage limits.
• The protection degree of the switch is only valid when
the switch is installed in accordance with all safety and
electrical codes and regulations.
CLEANING
• Never use aggressive solvents.
• Do not use high pressure water to clean the switch.
MAINTENANCE/TROUBLESHOOTING
• All Ashcroft switches require little or no maintenance.
• Be sure the cover on the APA switch is closed at all times.
• When the switch is exposed to process media that may
harden and/or build up in the pressure port, the switch
should be removed and cleaned as required.
• If the switch does not function, only trained and skilled
personnel should check on the wiring, power supply and/or
mounting.
• If the problem cannot be solved, please contact one of the
Ashcroft affiliates or distributors.
FACTORY SETPOINTS
The APS switches and APA switches with a setpoint called
out in the product code are set at the factory as follows:
• Increasing Setpoint (R) Rising Pressure or Decreasing
Vacuum –Normally Open contact will close when the
pressure is raised from 0 psig to the setpoint. The
resetpoint is then measured from the setpoint, reducing the
pressure until the Normally Open contact opens.
• Decreasing Setpoint (D) Decreasing Pressure or Increasing
Vacuum – Normally closed contact will close when the
pressure is lowered from full range pressure to the setpoint.
The reset is then measured from the setpoint, increasing the
pressure until the Normally Closed contact opens.
Note: When ordered as a –15/15 psi range switch, depending
on setpoint, the Normally Open contact may be closed
as received.
Safety Manual and SIL Certificate, CRN available on
www.ashcroft.com