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1MRS755014
Profibus-DPV1/SPA Gateway
Installation and Commissioning
SPA-ZC 302
3.2. Mechanical installation
1. Fix the module with two screws on the bottom or wall of the cubicle, near the
protection relay that the module will be connected to. Notice the length of the
SPA connection cable.
2. Ensure that the DIP switch configuration of the module is correct, see Section
3.3.3.3. DIP switch configuration.
3. Connect the SPA communication cable between the SPA relay and D-connector
of the SPA-ZC 302, for details, see Fig. 3.1.-1. If you connect several relays, use
a SPA-ZC 21 on the SPA-ZC 302’s SPA port and build an optical loop
connecting all the relays.
4. Connect the twisted pair cable to the Profibus D-connector of the SPA-ZC
302.The other end of the cables is connected to a Profibus DP master.
3.3. Electrical installation
3.3.1. Auxiliary power connection
Voltage range for the external power connection (Uaux) is 110-240 V AC/DC.
In addition, there is an earthing screw for the protective earth conductor beside the
screw terminals in the casing. Refer to Fig. 2.2.-1 for the location of the auxiliary
power connectors.
3.3.2. Profibus DP version 1 bus interface
The Profibus DP version 1 bus interface of the gateway consists of the following
parts:
• A 9-pin D-type sub miniature connector
• Two rotary switches for address selection
• Four LEDs for status and diagnostic purposes
3.3.2.1. RS-485/Profibus DP version 1
The Profibus DP version 1 interface is able to handle serial communication with RS-
485 levels.
It is recommended to use a Profibus connector that does not cover DIP switches or
status LEDs. Some of the commonly used connectors can easily be flipped to face
right or left.
Profibus requires that the last device in the daisy chain must be
terminated.
Table 3.3.1-1 Screw terminal of Uaux connection
Screw terminal AC DC
1N-
2L+
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