PSSU/1 TAPESWITCH, PSSU/1 Datasheet - Page 3

• Manufacturer Part Number: PSSU/1
• Description: Switch, FAIL SAFE INTERFACE CONTRollerS, 110/240 VAC, DIN RAIL MOUNT
• Manufacturer: TAPESWITCH
• Type: Safetyr

Specifications of PSSU/1

• Application: Medium to high risk safety
• Brand/series: PSSU Series
• Dimensions: 2.95 in. L x 2.2 in. W x 4.3 in. H
• Enclosure Type: DIN Rail Mounted
• Frequency, Operating: 50⁄60 Hz
• Monitor Output: 5 A @ 240 VAC Resistive, Non-Inductive
• Mounting Type: DIN Rail
• Output Contact: 2 x Normal Open, 2A @ 240 VAC Resistive, Non-Inductive
• Output Relays: 2 x Safety Relays Cross Monitored
• Power Consumption: 6 VA
• Primary Type: Controller
• Protection Rating: IP20
• Reset Mode: Manual (Remote)
• Standards: UL, cUL
• Temperature, Operating: 0 to 50 °C
• Time, Response: 20 ms (Max.)
• Voltage, Supply: 110/240 VAC
• Weight: 13 Oz.
• Lead Free Status / Rohs Status: RoHS Exempt Product
• For Use With: Machine Control

Release 08/2007 Ver. 2.0
MECHANICAL
PSSU/1 and PSSU/2 Control Units - should be mounted in
the machine control unit on standard 'top hat' terminal rail type
DIN EN 50 022-35. The machine control unit must provide
sealing to IP54 according to IEC 529. The dimensions of these
two units are shown in Figure 2.
PSSU/3 and PSSU/4 Control Units - should be mounted on a
permanent part of the machine in a position which keeps
cabling to a minimum and provides sufficient protection from
damage by passing traffic but allows adequate access for
servicing. The dimensions of these units and the position of
mounting holes are shown in Figure 3.
It will be necessary to punch or drill cable entry holes in the
enclosure. These holes should be made in the top and bottom
surfaces of the enclosure. It is recommended that the printed
circuit board (PCB) assembly be removed while these holes
are made. Ensure that the PCB assembly is refitted in its
original orientation. For sensors with two 2-wire cables, six
holes will be required. For a sensor with a single cable, five
holes will be required. See Figure 4 for hole positions.
One hole should be used for (each of) the sensor cable(s), one
for the mains supply cable, one for each of the safety output
cables, one for the reset input cable and one for the monitor
output cable. The holes should be 20 mm diameter to accept
PG13.5 cable glands. Six cable glands are supplied with the
unit which will accept cable of 5-9 millimeter diameter. If other
cable glands are used, they must provide sealing to at least
IP54 according to IEC529.
The exact cabling requirements are at the discretion of the
installer and depend to a large extent on the siting of the
various control system elements and whether the monitor
output is used. Generally it is recommended that high voltage
cables are routed away from low voltage cables.
TAPESWITCH CORPORATION
Figure 3
2
RESET INPUT DEVICE
A momentary action, normally-open switch, preferably a 22mm
industrial pushbutton, should be used to provide the reset
input. The switch should be housed in a suitable enclosure and
should be mounted in such a position that it is safe from
damage by passing traffic and such that the person operating
the switch can see all of the dangerous area.
ELECTRICAL
GENERAL - The connections for each of the control units are
shown in Figures 5, 6, 7 and 8. Crimped ferrules should be
fitted on all stranded wires. It is recommended that electrical
installation be performed in the order described below.
SENSOR(S) CONNECTION - Connect the sensor cables to
the control unit taking particular care that there are no stray
strands which could cause a short between adjacent terminals.
A number of sensors can be connected in series, see figures
13-16 for details and limitations. When connecting a number of
sensors in series, the PSSU Controller treats these "combined"
sensors as a single sensor. When any one of the sensors is
actuated the output relays de-energize.
POWER CONNECTION - Connect mains power to the control
unit. For AC operation on the PSSU/1 and the PSSU/3 units,
jumpers will need to be fitted to select the appropriate voltage.
The power consumption is 6 VA maximum.
RESET INPUT CONNECTION - Connect the reset input to the
control unit. If the machine has two MPCEs, a pair of normally
closed auxiliary contacts from each MPCE can be connected in
series with the reset input as shown in Figure 9. This provides
cross-monitoring of the MPCEs such that if they are in disparity
due to a fault, reset will be prevented until the fault is rectified.
The reset input can also be used to provide a test input. This is
often used in higher risk applications where the actuation of the
safety device is simulated every machine cycle to reveal faults
in the machine interface. This test input can be provided by
connecting a normally open contact in parallel with the reset
switch as shown in Figure 10.
Installation Instructions: PSSU Control Unit