Discrete Signal Protection
(Ground Referenced Circuits)
PT 4x1 and PT 2x1 Series
Brochure 1364B
February 2003
Description
Ground referenced signals such as discrete I/O
(binary) should be protected with the PT 4x1 series.
Each PT 4x1 can protect up to 4 discrete I/O signal
circuits (using a common return). The circuit design
features a hybrid circuit providing line-to-ground
protection with fast acting SAD components and highpowered GDT technology. As with the other
PLUGTRAB PT series, the protection is achieved in a
“hot-swap” plug unit allowing, quick maintenance and
diagnostics.
For applications where only two discrete signals are to
be protected, the PT 2x1 series plugs are available.
The footprint and packaging is identical to the other PT
series. The protection circuit is connected using pins
7, 11/8,12.
Figure 12. Circuit Diagram with PT 4x1-BE
Ordering Information
PT 4x1-5DC-ST –
Plug for four 5 V dc discrete circuits
PT 4x1-12DC-ST –
Plug for four 12 V dc discrete circuits
PT 4x1-24DC-ST –
Plug for four 24 V dc discrete circuits
28 38 30 6
PT 4x1-12AC-ST –
Plug for four 12 V ac discrete circuits
PT 4x1-24AC-ST –
Plug for four 24 V ac discrete circuits
28 38 34 8
PT 4x1-BE –
Base element for PT 4x1 plugs
PT 4x1+F-BE –
Base element with integrated gas
discharge tube for PT 4x1 plugs
28 39 36 3
28 38 31 9
28 38 32 2
Figure 13. Circuit Diagram with PT 4x1+F-BE
28 38 35 1
Note:
indicates potential earth
also called earth ground. This
is the same potential as the
DIN-rail mounting foot.
1364A029
28 39 37 6
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • Fax: (717) 944-1625
13
Brochure1364B
Discrete Signal Protection (Ground Referenced Circuits)
PT 4x1 and PT 2x1 Series
Ordering Information
Figure 14. Circuit Diagram with PT 2x1-BE
PT 2x1-5DC-ST –
Plug for two 5 V dc circuits
PT 2x1-12DC-ST –
Plug for two 12 V dc circuits
PT 2x1-24DC-ST –
Plug for two 24 V dc circuits
28 56 06 1
PT 2x1-12AC-ST –
Plug for two 12 V ac circuits
PT 2x1-24AC-ST –
Plug for two 24 V ac circuits
28 56 09 0
PT 2x1-BE –
Base element for PT 1x2 plugs
PT 2x1+F-BE –
Base element with integrated gas
discharge tube for PT 1x2 plugs
28 56 13 9
Figure 15. Circuit Diagram with PT 2x1+F-BE
Note:
indicates potential earth
also called earth ground. This
is the same potential as the
DIN-rail mounting foot.
1364A029
Table 4. PT 4x1 and PT 2x1 Technical Specifications
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • Fax: (717) 944-1625
Brochure 1364B
14
28 56 07 4
28 56 08 7
28 56 10 0
28 56 14 2
Discrete Signal Protection (Ground Referenced Circuits)
PT 4x1 and PT 2x1 Series
Figure 16. Wiring Diagram
When to use PT 4x1-BE and PT
2x1-BE base elements without gas
tube isolation:
The PT 4x1-BE and PT 2x1-BE base elements are
best suited for discrete circuit installations where the
common reference (to or from the I/O) is to be
grounded at the termination point.
These versions of the base element do NOT include
the isolation from return to ground. This means
positions 9, 10 and 3, 4 are electrically the same.
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • Fax: (717) 944-1625
15
Brochure1364B
Discrete Signal Protection (Ground Referenced Circuits)
PT 4x1 and PT 2x1 Series
Figure 17. Wiring Diagram
When to use PT 4x1+F-BE and PT
2x1+F-BE base elements with gas
tube isolation:
The PT 4x1+F-BE and PT 2x1+F-BE base elements
are best suited for discrete circuit installations where
the common reference (to or from the I/O) is to be
ungrounded (floating) at the termination point.
The integrated gas tube then supplies isolation
between the ungrounded common at position 9 (IN) and
10 (OUT) and the earth ground at position 3 (IN) and 4
(OUT).
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • Fax: (717) 944-1625
Brochure 1364B
16