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Protection and safety
Data & signal protection
OVR RS485, RS485Q & SL RS485 Series

OVR RS485, RS485Q & SL RS485 Series - Technical specification
Electrical specification OVR RS485 OVR SL RS485 OVR RS485Q
ABB order code 7TCA085400R0311 7TCA085400R0310 7TCA085400R0312 5
Nominal voltage (1) 15 V
Maximum working voltage Uc (RMS/DC) (2) 11 V/16.7 V
Current rating (signal) 300 mA
In-line resistance (per line ±10%) 1 Ω
Bandwidth (-3 dB 50 Ω system) 45 MHz
Transient specification OVR RS485 OVR SL RS485 OVR RS485Q
Let-through voltage (all conductors) Up
(3)
C2 test 4 kV 1.2/50 μs, 2 kA 8/20 μs to BS EN/EN/IEC 61643-21 55.0 V
C1 test 1 kV, 1.2/50 μs, 0.5 kA 8/20 μs to BS EN/EN/IEC 61643-21 42.0 V
B2 test 4 kV 10/700 μs to BS EN/EN/IEC 61643-21 27.2 V
5 kV, 10/700 μs (4) 28.2 V
Maximum surge current
D1 test 10/350 μs to – Per signal wire 2.5 kA 1.25 kA 2.5 kA
BS EN/EN/IEC 61643-21 – Per pair 5 kA 2.5 kA 5 kA
8/20 μs to ITU-T K.45:2003, – Per signal wire 10 kA
IEEE C62.41.2:2002 – Per pair 20 kA
Mechanical specification OVR RS485 OVR SL RS485 OVR RS485Q
Temperature range -40 to +80 °C
Connection type Screw terminal - Screw terminal - Pluggable 12 way screw
max. torque 0.5 Nm max. torque 0.8 N terminal
Conductor size (stranded) 2.5 mm 4 mm 2 2.5 mm 2
2
Earth connection M6 stud Via DIN rail or 4 mm 2 Via DIN rail or M5
earth terminal - threaded hole in base of
max. torque 0.8 Nm unit
Case Material FR Polymer UL-94 V-0
Weight – Unit 0.08 kg 0.1 kg
– Packaged (per 10) 0.85 kg 1.3 kg
Dimensions See diagram below

OVR RS485 OVR RS485Q 95 mm

54 mm M3 clearance
38 mm
Depth: 18 mm
105 mm 87 mm 69 mm
M4 clearance
42 mm
120 mm
19 mm
109 mm
M4 clearance
OVR SL RS485

(1) Nominal voltage (RMS/DC or
AC peak) measured at < 10 μA
(2) Maximum working voltage (RMS/DC 104.6 mm
or AC peak) measured at < 5 mA
(3) The maximum transient voltage let-through of the 106.5 mm
protector throughout the test (±10%), line to line &
line to earth, both polarities. Response time < 10 ns
(4) Test to IEC 61000-4-5:2006, ITU-T (formerly 7 mm 2 S 1 1 S 2 E
CCITT) K.20, K.21 and K.45,Telcordia
GR-1089-CORE, Issue 2:2002, ANSI TIA/EIA/
IS-968-A:2002 (formerly FCC Part 68)