Allen-Bradley 440N-Z21S17H, 440N-Z21S16B, 440N-Z21S16A, 440N-Z21S16J, 440N-Z21S17A Installation Instructions Manual
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SensaGuard
TM
18 mm Plastic Barrel
Installation Instructions
Certifications
IMPORTANT:
SAVE THESE INSTRUCTIONS FOR FUTURE USE
Note: Refer to Technical Specifications for Certification information and ratings.
Table of Contents
Installation Instructions 3
Warnings 3
Technical Specification 3
Operating Characteristics 3
Outputs (internally fused) 3
Environmental 3
Protection 4
Dimensions 4
Mode of Operation 4
Status Indicators 4
Mounting Information 4
Nut Torque Specification 4
Minimum Distance Between Sensors 5
Misalignment Curve 5
Wiring Diagram 5
Recommended Mating Cable 5
Diagnostics 5
Troubleshooting 6
Application Wiring Examples 8
List of Recommended Relays 12
Maintenance 12
Repair 12
Declaration of Conformity 12
PA-75056-180-01(A), September 2006
2 SensaGuardTM18 mm Plastic Barrel Installation Instructions
Installation Instructions
Installation must be in accordance with the following steps and stated specifications and should be
carried out by suitable competent personnel. The unit is not to be used as a mechanical stop. Guard
stops and guides must be fitted. Adherence to the recommended maintenance instructions forms part
of the warranty.
This device is intended to be part of the safety related control system of a machine. Before installation,
a risk assessment should be performed to determine whether the specifications of this device are suitable for all foreseeable operational and environmental characteristics of the machine to which it is to
be fitted. Refer to Technical Specifications for Certification information and ratings.
ATTENTION: The presence of spare actuators compromise the integrity of the safety sys-
tems. Personal injury or death, property damage or economic loss can result.
Appropriate management controls, working procedures and alternative protective measures should be introduced to control their use and availability.
WARNING: Do not defeat, tamper, remove or bypass this unit. Severe injury to personnel
could result. The sensor MUST be connected to a Class 2 SELV 24V DC,
+10% / -15% power supply.
Technical Specification
Safety Ratings CAT4/SIL3
Safety Certifications TÜV, CE
Safety Standards IEC60947-5-3, IEC61508, EN954
Certifications cULus
Standards UL 508
PFHd 1.119 - 10
-9
Operating Characteristics
Sensing Distance (Actuator) 18 mm 30 mm
Assured Make (mm) 15 25
Assured Break (mm) 25 35
Typical misalignment (±7 mm in both axes)
Maximum output current (all
outputs, mA) 200
Input Current 50 mA (no load supply current)
Operational Current, Min. ≤ 1 mA DC
Off-state Current < 0.5 mA DC
Maximum # of switches, connected in series Unlimited. See unit response time section
Operating Voltage 24V DC +10% / -15%
Class 2 SELV power supply
Frequency of operating cycle 1 Hz
Response Time (Off) 54 ms
Case Material Valox
®
DR 48
Actuator Material Valox
®
DR 48
Outputs (internally fused)
OSSD 2
Auxiliary 1
Environmental
Operating Temperature -10…+55°C (+14…+131°F)
Operating Humidity 5% -95% relative
Washdown rating NEMA 3, 4X, 12,13, IP 69K
Shock & Vibration IEC68-2-27 30 g, 11 ms/IEC 68-2-6
10…55Hz
Radio Frequency IEC 61000-4-3
IEC 61000-4-6
PA-75056-180-01(A), September 2006
SensaGuardTM18 mm Plastic Barrel Installation Instructions 3
Protection
Short-Circuit Protection Incorporated
Current limitation Incorporated
Overload Protection Incorporated
False Pulse Protection Incorporated
Transient Noise Protection Incorporated
Reverse Polarity Protection Incorporated
Overvoltage protection Incorporated
Thermal shutdown/restart Incorporated
Electrical Life 10 x 10
6
Dimensions - mm (inches)
Mode of Operation
Status indicators:
• “Power/Fault” LED illuminates Green - The unit is ready for operation.
• “Power/Fault” LED illuminates Red: - Door/Guard open. The unit is not ready for operation.
• “Power/Fault” LED illuminates flashes Red or Green: - Unit failure. See Diagnostic section below.
Mounting Information
Use non-removable screws, bolts, or nuts to mount the switch and
actuator. Do not over torque the mounting hardware.
Position the switch and actuator so they are aligned with each other.
Mount the switch and actuator to removable guard, door or gate.
Keep the switch and actuator within the sensing range below.
Nut Torque Specification
Plastic Barrel Switch: 2.26 N•M (20 in•lbs)
Plastic Actuators: 2.26 N•M (20 in•lbs)
PA-75056-180-01(A), September 2006
4 SensaGuardTM18 mm Plastic Barrel Installation Instructions
30 mm Actuator
48.92
[1.926]
19.81
[0.78]
22.22
[0.875]
48.92
[1.926]
19.81
[0.78]
22.22
[0.875]
30.40
[1.197]
16.84
[0.663]
3.17
[0.125]
4.57
[0.18]
DIA
2 PLACES
Sensor
18 mm Actuator
67.06
[2.640]
2.03
[.080]
M18X1
36.47
[1.436]
13.72
[0.54]
15.87
[0.625]
36.47
[1.436]
13.72
[0.54]
15.87
[0.625]
4.57
[0.180]
DIA
19.81
[0.78]
3.17
[0.125]
15.42
[0.607]
2 PLACES
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