Module Details - Juniper ERX - RELEASE 11.1.X HARDWARE GUIDE 03-23-2010 Hardware Manual

Chapter 1: ERX Overview
Figure 10: SRP Module for ERX310 Router

Module Details

ERX7xx and ERX14xx models use up to two redundant SRP modules operating in
an active/standby configuration. ERX310 router use only one SRP module. An SRP
module must be present for any system to boot.
SRP modules ranging from 5 Gbps to 40 Gbps can be used in ERX7xx and ERX14xx
models. Only a 10-Gbps SRP module (SRP-SE10G) can be used in ERX310 router.
See the ERX Module Guide for complete information.
NOTE: Because of different physical dimensions and switch fabric capabilities, SRP
modules are not interchangeable between systems. For example, the 10-Gbps SRP
module used in ERX7xx and ERX14xx models cannot be used in the ERX310 router,
and vice versa.
CAUTION: Do not remove the SRP module while the system is running.
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ERX Modules