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Technical Reference Manual, General
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When ordering REX 521 protection relays, specify the following:
• Order number
• Quantity
• Additional language
Each protection relay has a specific order number that identifies the protection relay
type as well as the hardware and the software as described in Fig. 6.-1 below.
The order number is labelled on the marking strip on the front panel of the relay
delivered, for example, Order No: REX521CMHPSM01D.
REX521CMHPSM01D
XX
Configuration revision
Configuration name: B01, B02, M01, M02, H01, H02, H03, H04, H05, H06, H07
Rear communication: S=SPA/IEC, MODBUS L=SPA/IEC/MODBUS/LON
Optical connectors for rear communication: P = plastic-fibre, G = glass-fibre
Power supply: H = PS_87H, L = PS_87L
Type of hardware: B = Basic, M = Medium, H = High, S = High sensor
Revision
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English is always available in REX 521. When ordering, the other additional
language must be defined according to the table below.
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FI English-Finnish
SE English-Swedish
DE English-German
ES English-Spanish
FR English-French
PT English-Portuguese
PL English-Polish
When ordering REX 521, the latest hardware and configuration revisions are
delivered unless otherwise specified.
Display language (see the table about display language codes)
1MRS 751108-MUM
OrderNo_a