Siemens SCALANCE X-300EEC, Compact Operating Instructions

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6.2 Notes on commissioning
Note
Commissioning devices with redundancy mechanisms
If you use redundancy mechanisms ("HRP" media redundancy or "MRP" and/or redundant
coupling of rings over standby coupling), open the redundant path before you insert a new or
replacement device in an operational network. A bad configuration or attachment of the
Ethernet cables to incorrectly configured ports causes overload in the network and a
breakdown in communication.
A device may only be inserted in a network and connected in the following situations:
● HRP/MRP:
The ring ports of the device being inserted in the ring were configured as ring ports. The
required redundancy mode must also be enabled (see "Configuration Manual SCALANCE
X‑300 / X‑400", section "X‑300 Ring Configuration"). If the device is intended to operate as
the redundancy manager, "Redundancy manager enabled" must also be set.
● Standby coupling:
"Standby connection" must be "enabled" and the "Standby connection name" must match
the name of the partner device. You will also need to configure the port with "Enable Standby
Port Monitoring" (see "Configuration Manual SCALANCE X‑300 / X‑400", section "X‑300/
X‑400 Standby Mask").
6.3 Wiring rules
When wiring use cables with the following AWG categories or cross sections.
Wiring rules for ... Screw/spring-loaded termi‐
nals
connectable cable cross sec‐
tions for flexible cables ...
without wire end ferrule 0.25 - 2.5 mm
2
AWG: 24 - 13
with wire end ferrule with plastic fer‐
rule**
0.25 - 2.5 mm
2
AWG: 24 - 13
with wire end ferrule without plastic fer‐
rule**
0.25 - 2.5 mm
2
AWG: 24 - 13
with TWIN wire end ferrule** 0.5 - 1 mm
2
AWG: 20 - 17
Stripped length of the cable 8 - 10 mm
Wire end ferrule according to DIN 46228 with plastic ferrule** 8 - 10 mm
* AWG: American Wire Gauge
** See note "Wire end ferrules"
Connecting
6.3 Wiring rules
SCALANCE X-300EEC
42
Compact Operating Instructions, 11/2019, A5E02630809-14