Siemens 7SR105 Rho - Other Features

7SR105 Rho Description of Operation
©2018 Siemens Protection Devices Chapter 1 Page 7 of 57
1.4 Ordering Options
Product description
Variants
Order No.
7SR105 Rho
7
S
R
1
0
5
-
-
A
0
Motor Protection Relay
Case, I/O and Fascia
Size 4 Moulded case, 4CT, 6 Binary Inputs/
6 Binary Outputs, 10 LEDs
3
Measuring input
1/5 A, 50 Hz
2
Auxiliary voltage
AC/DC 60 to 240 V, Binary input
threshold 44 V AC/V DC
L
DC 24 to 60 V, Binary input threshold
19 V DC
J
1
Protective Cover
Standard version – No Cover
A
Communication
Front Port : USB and Rear Port: RS-485
supporting IEC 60870-5-103 or Modbus
RTU or DNP 3.0
2
Temperature Input
Without RTD
1
E
6 RTD Input
2
F
Front Fascia
Standard Version – with Breaker
Control Push Buttons
2
Protection Function Packages
E
Standard version - included in all
models
14 Stall Protection
37 Undercurrent
46 Phase Unbalance Protection
46PhRev Phase Reversal
48/66 Start Protection
49 Thermal Overload
50/51 Overcurrent
50/51, GN Earth fault
50BCL Break Capacity Limit
50BF Circuit Breaker Fail
74T/CCS Trip/Close Circuit Supervision
81B Anti Backspin
CB Counters
I
˄
2T CB Wears
Programmable Logic
Standard Version Plus
Additional Function in
Temperature Input version
model
F