Safety distance formula, Models – Pinnacle Systems UltraTouch UL-101-2P 110VAC User Manual
Page 2
SAFETY DISTANCE FORMULA
Each operator hand control shall be located at a distance from the point of
operation so that the operator cannot release either hand control and reach into the point of
operation prior to die closure or prior to cessation of slide motion during the closing of the
stroke.
Below is the formula for calculating the safety distance of the palm buttons:
The machine should be measured with the machine running at its fastest speed with its heavi-
est die or tooling and the stop time being measured at the 90°
position in the down stroke. The following formula should be used when
calculating the safety distance.
Ds = K x (Ts + Tc + Tr + Tbm)
Ds
=
Minimum safety distance between the device and the nearest point of
operation hazard (in inches).
K
=
Hand speed constant. This value has been determined by various
studies and although these studies indicate speeds of 63 in./sec. to
over 100 in./sec., they are not conclusive determinations. The
employer should determine this value by considering all factors,
including physical ability of the operator.
Ts
=
Stop time of the machine tool measured at the final control element.
Tc
=
Response time of the control system.
Ts & Tc are usually measured by a stop time measurement device.
Tr
=
Response time of the presence sensing device and its interface, if
any, as stated by the manufacturer or measured by the employer.
Tbm =
Additional time allowed for the brake monitor to compensate for
variations in normal stopping time.
Palm buttons used as operator hand controls must be installed in accordance with the instal-
lation instructions and applicable local regulations, such as OSHA, ANSI or European stan-
dards. The complete machine control system as well as the guarding systems must be con-
sidered, including interface, safety distance, ancillary guarding, and all control elements that
affect safety. Consult with your local regulatory agency before installing the palm buttons.
WARNING: DO NOT use on full revolution power presses. This type of press cannot be
stopped in mid-stroke.
Models:
UL-101-2P (2 pole, 110VAC)
UL-101-4P (4 pole, 110VAC)
Installa
Installa
Installa
Installa
Installation
tion
tion
tion
tion
UltraTouch must be installed in pairs with an anti-tie down
circuit between them to force the user to activate both units
concurrently to initiate hazardous motion. Install units in such
a manner that the wrist or forearm cannot activate both units
while reaching into the point of operation. They shall be
located a minimum of 25” apart, center to center. Install
both units the proper distance away from the point of operation
in accordance wit OSHA regulations.
WARNING: Do not over-tighten the four hold down
screws (diagram item #12). Tighten unit on top of gasket
to obtain a snug fit and no more.
WARNING: This unit does not contain anti-tie-down
circuitry. This function is performed either by a UL-601
unit or your own control system. This is an initiation
device only and not a safety device.
Oper
Oper
Oper
Oper
Opera
a
a
a
ation
tion
tion
tion
tion
Each UltraTouch contains an optical sensor, capacitive sensor
and circuitry that requires the user to activate both sensors
within a 1/4 sec of each other. When you insert your hand
into the slot, (1) you break the infrared beam, and (2) your
mass is detected by the capacitive sensor (this dual sensor
system prevents accidental activation of the unit due to shirt
sleeves, etc.) The Green LED will light and the relay(s) will
energize.
Item
Part No.
Description
1
11-057
IR plastic housing
2
21-024
Brass plate (cap. sensor)
3
32-001
Captive contact relay(s)
4
41-008
Transformer
7
20-022
1A fuse
8
11-022
Lock down tabs
9
22-008
#4 Phillips flat head screw
10
26-019
Identification label
11
21-008
Gasket
12
22-010
#6-32 x 5/8” Phillips screw
13
52-064
Entire sub-assembly
Terminal Description
L
110VAC line
N
Neutral
G
Earth Ground (required)
1 & 2
Open when green --|/|--
3 & 4
Closed when green --| | --
Contacts rated at 2 amps @120VAC
Second Relay & Terminal Strip:
Repeat of Terminals 1-4 (UL-101-4P)
3715 Swenson Avenue
St. Charles, IL 60174
Customer Service: 630-443-8542 (CST)
(Please have Model, Serial, and Software Revision numbers vailable)
Sales and Marketing: 800-569-7697 (EST)
www.pinnaclesystems.com
PN#: 28-011R2