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rights reserved. Changes, which serve technical improvements are reserved.
4
PRSU/4, PRSU/5 Operating Instructions Manual (Revision 3.0)
Device Startup Verification
Before creating any electrical connection to the device´s relay channels,
RESET circuit, or switch monitoring terminals, select a power supply with ap-
propriate voltage settings and ensure its output is set OFF.
Connect the power supply output (with appropriate input power source; see
requirements listed on Page 10 of this manual) to the PRSU/4 or PRSU/5
power input terminals (A1, A2), then apply the correct voltage for the device
and verify that the “Power” LED illuminates green.
Turn OFF power from the supply and make the appropriate connections to
the switch monitoring channels, relays and RESET circuit according to the
configuration guidelines laid out on Pages 5 through 7 of this manual.
When the correct configuration is implemented and power is again applied,
monitoring of the switches/sensors will only occur once a RESET signal is
received by bridging S33 and S34 with an appropriately rated wire. See
Pages 5 through 7 of this manual for more information.
After the RESET signal is received and the monitored switch is in the
unactuated state, the relay contacts (13
→
14), (23
→
24) and (33
→
34) will
close. Contacts (41
→
42) will open.
Recommended Limits
Performance of the PRSU/4 and PRSU/5 is limited according to the values
listed on Page 10 of this manual.
In particular, a 200Ω limit on short-circuit
(actuated state) series resistance is required for four-wire, fail-safe
applications. The overall series resistance of different products, cables and
layouts can vary greatly. To ensure that a particular application will require
only a single PRSU/4 or PRSU/5, the following rule-of-thumb guidelines can
be used:
Recommended Application Limits
Product Type
Maximum Area
Maximum Length
ControlMat, ArmorMat, DPM
100ft²
N/A
Sensing Edge Products (all)
N/A
200ft
Ribbon Switches
N/A
200ft
SE-45, SE-75, SE-C Bumpers
N/A
200ft
All values listed assuming 20AWG/4, Ø3/16, lead cable @ 500ft max.
Table 1: Safety Product Recommended Limits
