User's Manual

DEC. 2011—EFT REVIEW DRAFT—CISCO CONFIDENTIAL
2-24
Cisco 1240 Connected Grid Router Hardware Installation Guide
OL-12345-01
Chapter 2 Router Hardware Description
Hardware Features Detailed Description
Specifications
Small Form-Factor Pluggable (SFP) Ports
Figure 2-18 Router SFP Ports
Specification RS232 RS422 RS485
Connector type
RJ-45
Cable
Cisco serial transition cable that matches the signaling protocol
Pinouts
See Connector and Cable Specifications
Signaling
Single-ended Differential Differential
Max. drivers
1 1 32
Max. receivers
1 10 32
Operating mode
Full duplex Half duplex
Full duplex
Half duplex
Full duplex
Network topology
Point-to-point Multidrop Multipoint
Max. distance (standard)
15 m 1200 m 1200 m
Max speed
(at 12 m/1200 m)
20 Kbps/1 Kbps 10 Mbps/100 Kbps 35 Mbms/100 Kbps
Max. slew rate
30 V/ìs NA NA
Receiver input resistance
3..7 kÙ 4 kΩ 12 kΩ
Driver load impedance
3..7 kÙ 100 Ù 54 Ù
Receiver input sensitivity
±3 V ±200 mV ±200 mV
Receiver input range
±15 V ±10 V –7..12 V
Max. driver output voltage
±25 V ±6 V –7..12 V
Min. driver output voltage (load)
±5 V ±2.0 V ±1.5 V
Pinouts
See Connector and Cable Specifications