ABB JSHD4 Manual

Excerpts from the original instructions
JSHD4
Three-position enabling device
General description
JSHD4 is a dual channel three-position enabling device, intended for use in hazardous areas where no other protection is
possible or practical. The device as a stand-alone unit is not sufficient for this task and must be connected to a suitable
control unit (safety relay or safety-PLC) with two channel inputs and short-circuit detection. Also, the machinery or
equipment causing the potential danger may need to be set in jog-mode or by other means limited in movement, speed,
temperature etc.
Warning! The anti-tampering device is not a safety function; the safety relies on the three-position button being operated
as intended.
Function description
Two three-position switches are used and operated simultaneously, to provide a dual channel safety system.
The symbol for three-position switches illustrates the three positions (OFF, ON and OFF)
with O and I, the pushing force from left to right, and the possible switching travels (IEC
60947-5-8:2006).
An important characteristic for a three-position switch is that when returning from position
3, the ON state is not reached – the contacts remain open.
The three positions are designated as follows:
Position 1: OFF state of the contact (actuator is not pressed)
Position 2: ON state of the contact (actuator is pressed to the normal enabling position)
Position 3: OFF state of the contact (actuator is fully depressed).
When released, the actuator always returns to position 1, regardless of whether it was in position 2 or 3. During this return
movement, the contact(s) remain open.
Anti-tampering device
Many versions of JSHD4 can be equipped with a sensor that prevents tampering (for instance by keeping the three-
position switches in ON-position using a rubber band or similar). The sensor detects a human hand and also the small
movements/vibrations that are normal when holding the handle. If both these requirements are fulfilled (detected), a
contact is closed. When properly connected, the contact can be used to open the safety circuit, and thus prohibit
tampering.
Anti-tamper PCB
The optional anti-tamper PCB may be connected separately or in series with one of the three-position push buttons (S1 or
S2).
Warning! When the anti-tamper PCB is connected in series with a three-position button, one out of the two alternatives
below must be implemented to ensure proper functionality of the three-position switch:
1. Simultaneous check of the two channels at actuation of the switches.
2. Supervised reset of the three-position button connected in series with the anti-tamper PCB.
A Handle/Top part
B Connector top part
C Gasket
D Anti-tamper unit
E Connector bottom part
F Bottom part
G Screws
Installation
If a complete and ready to install unit is at hand, connect the cable to the control unit and connect enabling device to the
cable. Otherwise, first assemble top and bottom part and, if needed, the anti-tampering unit (PCB) following the
instructions below.
1. If used, insert pins from anti-tamper unit (D) into connector (B) from handle (A).
13: Red 14: Black 15: Blue
2. Insert PCB as shown, components facing forward. Push it all the way in.
3. If no anti-tamper is used, a jumper may need to be inserted between positions 14 and 16 in connector (B), depending
on bottom part.
4. Remove protective liner from gasket (C) on handle.
5. Join connectors (B) and (E).
6. Press bottom part (F) against handle and tighten screws (G).
Warning! All the safety functions must be tested before starting up the system
Maintenance
Warning! The safety functions and the mechanics shall be tested regularly, at least once every year to confirm that all the
safety functions are working properly (EN 62061:2005).
Warning! In case of breakdown or damage to the product, contact the nearest ABB Jokab Safety Service Office or
reseller. Do not try to repair the product yourself since it may accidentally cause permanent damage to the product,
impairing the safety of the device which in turn could lead to serious injury to personnel.
[EN] The complete original instructions can be found at:
[SE] Den kompletta bruksanvisningen i original finns på:
[DE] Die komplette Originalbetriebsanleitung
[IT]
[FR] La notice originale intégrale est disponible sur :
A
16: Pink
ist zu finden unter:
Le istruzioni originali complete si trovano qui:
www.abb.com/jokabsafety
C
D
E
B
www.abb.com/jokabsafety
G
F