Active termination resistor for PROFIBUS and RS-485 bus systems. Compact design, electrical isolation between supply and data interface, bus termination can be activated, integrated programming interface.
PROFIBUS or other RS-485 networks can be actively terminated at the end of the bus using the PSI-TERMINATOR-PB. This ensures safe communication even if the bus device is connected/disconnected during operation. In addition, the connectable termination enables the device to be operated as a service interface at any point in the bus system. For the operation of active programming and diagnostic devices, the required power supply is provided at the alternative D-SUB connection.
Ambient temperature (operation)
-20 °C ... 65 °C
Ambient temperature (storage/transport)
-40 °C ... 85 °C
Permissible humidity (operation)
30 % ... 95 % (non-condensing)
5000 m (For restrictions see manufacturer's declaration)
Degree of protection
DIN EN 50178 (RS-485 // VCC)
Test voltage data interface/power supply
1.5 kVrms (50 Hz, 1 min.)
Conformance with EMC Directive 2004/108/EC (valid until 19.04.2016) / 2014/30/EU (valid from 20.04.2016)
2383 Years (Telcordia standard, 25°C temperature, 21% operating cycle (5 days a week, 8 hours a day))
559 Years (Telcordia standard, 40°C temperature, 34.25% operating cycle (5 days a week, 12 hours a day))
3550 Years (SN 29500 standard, temperature 25°C, operating cycle 21 % (5 days a week, 8 hours a day))
1818 Years (SN 29500 standard, temperature 40 °C, operating cycle 34.25 % (5 days a week, 12 hours a day))
849 Years (SN 29500 standard, temperature 40°C, operating cycle 100 % (7 days a week, 24 hours a day))
Ex II 3 G Ex nA IIC T4 Gc X (Please follow the special installation instructions in the documentation!)
Class I, Zone 2, AEx nA IIC T5
UL, USA / Canada
Class I, Div. 2, Groups A, B, C, D
Class I, zone 2, Ex nA IIC T5 Gc X
Nominal supply voltage
24 V DC (via pluggable COMBICON screw terminal block)
Supply voltage range
19.2 V DC ... 28.8 V DC (via pluggable COMBICON screw terminal block)
Typical current consumption
45 mA (24 V DC)
PROFIBUS acc. to IEC 61158, RS-485 2-conductor
D-SUB 9, COMBICON
≤ 1200 m (Depends on transmission speed and cable type)
390 Ω (Can be connected)
Conductor cross section solid min.
Conductor cross section solid max.
Conductor cross section flexible min.
Conductor cross section flexible max.
Conductor cross section AWG min.
Conductor cross section AWG max.
Serial transmission speed
≤ 12 Mbps
Output nominal voltage
5 V DC
Status and diagnostic indicators
LEDs: UL (communications power), data activity (not marked)