Thermo Ramsey - Hoferick Engineering GmbH

Operation
Frequency Range
Voltage/current type sensor: 0.25 to 2.0 kHz
Contact closure type sensor: 0.25 to 30 Hz
Low threshold: +1.0 VDC min
High threshold: +3.2 VDC max
Low or High Pulse Duration
Voltage/current type sensor: 200 us min
Contact closure type sensor: 15 ms min
Hysteresis
0.5 VDC minimum
Input impedance
10 k-ohm typical, 500 ohm minimum
Input source current
-2 mA nom. at 0 VDC
Max. non-destructive Input voltage
±50 peak, continuous
Current Output
1 current output
Output range: User selectable 0 – 20 mA or 4-20 mA, representing 0 to
100% variable.
Resistive load: 800 ohm max. Loop
Capacitive load: No limit
Standard Communication
Serial Interface
Type: Conforms to RS-232C, RS-485/422, and 20 mA
standards; supports 2 and 4 wire multi-drop in RS-
485. 20 mA loop is passive ONLY.
Interfacing: RS-485 supports 2-wire or 4-wire multi-drop
networking; RS 232 C provides support for modem.
Data rate: 300 to 19200, operator selectable from the
keyboard.
Data Format: Asynchronous, bit-serial, selectable parity, data
length, and stop bits.
Optical Isolation: 250 VRMS max.
Input Voltage: ±30 Vdc max. (RS-232C)
±15/-10 Vdc max. (RS-485)
Cable Length: 50 feet max. (RS-232C)
4000 feet max (Rs-485 and 20 mA)
1-10Installation
Thermo Fisher Scientific
REC 4175 Rev B