https://www.phoenixcontact.com/us/products/2920722
Surge protection device - TT-2/2-M-24DC - 2920722
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Modular terminal block with two-stage surge protection for two signal wires with common reference potential,
disconnect knife on both signal paths, separate ground connection, nominal voltage: 24 V DC
Product Features
Versions with and without disconnect knife
Protection of two signal wires with common reference potential
Multi-stage modular terminal blocks with screw connection technology
Disconnection of signal circuits by disconnect knife
Key commercial data
Packing unit
1 pc
Weight per Piece (excluding packing)
32.85 GRM
Custom tariff number
85363010
Country of origin
Germany
Technical data
Dimensions
Height
92 mm
Width
6.2 mm
Depth
66.45 mm
Ambient conditions
Ambient temperature (operation)
-40 °C ... 80 °C
Degree of protection
IP20
General
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Surge protection device - TT-2/2-M-24DC - 2920722
Technical data
General
Housing material
PA 6.6
Inflammability class according to UL 94
V2
Color
black
Mounting type
DIN rail: 35 mm
Type
Double-level terminal block with PE foot – separate PE connection
Number of positions
2
Direction of action
Line-Earth Ground
Protective circuit
IEC test classification
C1
C2
C3
D1
Nominal voltage UN
24 V DC
17 V AC
Maximum continuous operating voltage UC
30 V DC
21 V AC
Maximum continuous voltage UC (wire-ground)
30 V DC
21 V AC
Nominal current IN
300 mA (40°C)
Operating effective current IC at UC
≤ 5 µA (per path)
Residual current IPE
≤ 10 µA (per path)
Nominal discharge current In (8/20) µs (Core-Core)
5 kA
Nominal discharge current In (8/20) µs (Core-Earth)
5 kA
Total surge current (8/20) µs
10 kA
Total surge current (10/350) µs
1 kA
Max. discharge current Imax (8/20) µs maximum (Core-Earth)
5 kA
Nominal pulse current Ian (10/1000) µs (Core-Earth)
30 A
Impulse discharge current (10/350)˽µs, peak value limp
500 A (per path)
Output voltage limitation at 1 kV/µs (Core-Earth) spike
≤ 45 V
Output voltage limitation at 1 kV/µs (Core-Earth) static
≤ 45 V
Residual voltage at In, (conductor-ground)
≤ 45 V
Residual voltage with Ian (10/1000)µs (conductor-ground)
≤ 50 V
Voltage protection level UP (Core-Earth)
≤ 85 V (C2 (10 kV/5 kA))
≤ 55 V (C1 (500 V/250 A))
Response time tA (Core-Earth)
≤ 1 ns
Input attenuation aE, asym.
0.5 dB (≤ 1.5 MHz / 50 Ω)
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Surge protection device - TT-2/2-M-24DC - 2920722
Technical data
Protective circuit
0.2 dB (≤ 400 kHz / 150 Ω)
Cut-off frequency fg (3 dB), asym. (PE) in 50 Ohm system
typ. 6 MHz
Cut-off frequency fg (3 dB), asym. (PE) in 150 Ohm system
typ. 2.5 MHz
Capacity (Core-Earth)
typ. 2.5 nF
Resistance in series
4.7 Ω ±20 %
4.7 Ω
Max. required back-up fuse
315 mA (e.g. T in acc. with IEC 127-2/III)
Surge current resistance (conductor-ground)
C2 - 10 kV/5 kA
D1 (500 A)
Alternating current carrying capacity (conductor-ground)
5A-1s
Connection data
Connection method
Screw connection
Connection type IN
Screw terminal blocks
Connection type OUT
Screw terminal blocks
Screw thread
M3
Tightening torque
0.8 Nm
Stripping length
8 mm
Conductor cross section stranded min.
0.2 mm²
Conductor cross section stranded max.
2.5 mm²
Conductor cross section solid min.
0.2 mm²
Conductor cross section solid max.
2.5 mm²
Conductor cross section AWG/kcmil min.
24
Conductor cross section AWG/kcmil max
14
Standards and Regulations
Standards/regulations
IEC 61643-21
Classifications
eCl@ss
eCl@ss 4.0
27140201
eCl@ss 4.1
27130801
eCl@ss 5.0
27130801
eCl@ss 5.1
27130801
eCl@ss 6.0
27130807
eCl@ss 7.0
27130807
eCl@ss 8.0
27130807
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Surge protection device - TT-2/2-M-24DC - 2920722
Classifications
ETIM
ETIM 2.0
EC000943
ETIM 3.0
EC000943
ETIM 4.0
EC000943
ETIM 5.0
EC000943
UNSPSC
UNSPSC 6.01
30212010
UNSPSC 7.0901
39121610
UNSPSC 11
39121610
UNSPSC 12.01
39121610
UNSPSC 13.2
39121620
Approvals
Approvals
Approvals
GOST / GOST
Ex Approvals
Approvals submitted
Approval details
GOST
GOST
Accessories
Accessories
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Surge protection device - TT-2/2-M-24DC - 2920722
Accessories
End cover
End cover - TT-D-2-PE-M-BK - 2920654
End cover for TERMITRAB TT-2-PE-M-... and TT-2/2-M-...
Labeled terminal marker
Zack Marker strip, flat - ZBF 6,LGS:FORTL.ZAHLEN - 0808749
Zack Marker strip, flat, Strip, white, labeled, Printed horizontally: Consecutive numbers 1 - 10, 11 - 20, etc. up to 91 - 100,
Mounting type: Snap into flat marker groove, for terminal block width: 6.2 mm, Lettering field: 5.15 x 6.15 mm
Marker for terminal blocks - ZB 6,LGS:U-N - 1051430
Marker for terminal blocks, Strip, white, labeled, can be labeled with: Plotter, Printed horizontally: U, V, W, N, GND, U, V,
W, N, GND, Mounting type: Snap into tall marker groove, for terminal block width: 6.2 mm, Lettering field: 6.15 x 10.5 mm
Zack marker strip - ZB 6,LGS:FORTL.ZAHLEN - 1051016
Zack marker strip, Strip, white, labeled, can be labeled with: Plotter, Printed horizontally: Consecutive numbers 1 - 10, 11
- 20, etc. up to 491 - 500, Mounting type: Snap into tall marker groove, for terminal block width: 6.2 mm, Lettering field:
6.15 x 10.5 mm
Marker pen
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Surge protection device - TT-2/2-M-24DC - 2920722
Accessories
Marker pen - B-STIFT - 1051993
Marker pen, for manual labeling of unprinted Zack strips, smear-proof and waterproof, line thickness 0.5 mm
Terminal marking
Zack Marker strip, flat - ZBF 6:UNBEDRUCKT - 0808710
Zack Marker strip, flat, Strip, white, unlabeled, can be labeled with: Plotter, Mounting type: Snap into flat marker groove,
for terminal block width: 6.2 mm, Lettering field: 5.15 x 6.15 mm
Zack Marker strip, flat - ZBF 6/WH-100:UNBEDRUCKT - 0808736
Zack Marker strip, flat, Strip, white, unlabeled, can be labeled with: Plotter, Mounting type: Snap into flat marker groove,
for terminal block width: 6.2 mm, Lettering field: 5.15 x 6.15 mm
Zack marker strip - ZB 6:UNBEDRUCKT - 1051003
Zack marker strip, Strip, white, unlabeled, can be labeled with: Plotter, Mounting type: Snap into tall marker groove, for
terminal block width: 6.2 mm, Lettering field: 6.15 x 10.5 mm
Drawings
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Surge protection device - TT-2/2-M-24DC - 2920722
Dimensioned drawing
6,2
Circuit diagram
94,8
1
3
OUT
69,1
IN
2
Schematic diagram
4
Catalog photo
a
b
a
4
2
OUT
IN
b
1
3
Figure may contain other products.
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Surge protection device - TT-2/2-M-24DC - 2920722
Application drawing
IN
OUT
PLC
L+
LPE
Application drawing
IN
OUT
PLC
L+
L-
PE
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