Section 2: Hardware Description; General; Case; Figure 2-1 Relay Shown Withdrawn - Siemens 7SR157 Argus Manual

Energy management

Section 2: Hardware Description

The structure of the relay is based upon the Reyrolle Compact hardware platform. The relay is supplied in a size

E4 or E6 case (where 1 x E = width of approx. 26mm). The hardware design provides commonality between

products and components across the Reyrolle Compact range of relays.

Table 2-1

Summary of 7SR157 Relay Configurations

Relay

Voltage

Inputs

7SR1577

7SR1578

The relays are housed in cases designed to fit directly into standard panel racks. The two case options have a

width of 104mm (E4) and 156 mm (E6), both have a height of 177 mm (4U). The required panel depth is

216.5mm, with wiring clearance a total of 242 mm. 290mm depth clearance should be allowed to accommodate

the bending radius of fibre optic data communications cables if fitted.

The complete relay assembly is withdrawable from the front of the case. Contacts in the case ensure that the

normally closed contacts remain short-circuited when the relay is removed. To withdraw the relay, remove the

plastic fascia cover by rotating the two securing pins and withdraw using the plastic handles. The relay should not

be carried using these handles. The relay should only be held by the top and bottom plates and the user should

not touch the exposed PCB's.

Binary

Inputs

Outputs

Chapter 1 - 7SR157 Description of Operation

LEDs

Chapter 1 - Page 9 of 38

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