Wiring To Control Terminals - Nederman High Vacuum Starter Manual De Instrucciones

9

Wiring to control terminals

NOTE!
For most installations wiring is necessary to terminals 1–2, terminals 30–35 and
terminals 40–41. Depending on options installed connection may be necessary also to
other terminals. Therefore, the installer must know what options have been ordered and
should be wired to the starter. Mark in the circles in Chapter '6 External connection' what
connections have been made.
The starter is ready for connection of all available options. For ASC (anti surge control),
a current transformer, which is provided with the ASC, must be installed in the starter
cabinet. See Chapter '7 Connection of certain options'. All functions supporting the ASC
are standard fitted.
The following text explains the function of all control terminals:
1–2 Maintenance switch (MS). On most markets a maintenance switch must be fitted
in the immediate vicinity of the vacuum unit. The starter control circuit must
then pass through an auxiliary switch in the maintenance switch. This prevents
non-permitted start and stop of the vacuum unit using the maintenance switch.
This could otherwise affect the safety properties of the maintenance switch.
Polarity without importance. Only if a safety switch is not installed,due to local
regulations, should terminals 1–2 be bridged.
3–4 Pilot signal (PS). Installations using automatic start/stop controlled by micro
switches on work sites (AS-set) have a pilot signal cable running from work site
valves to the starter. (All AS-sets wired in parallell.)
5–10 Remote start and stop. It is often convenient to control the starter from a remote
place, for example a control room or from the dust collector if located at a
distance from the starter. Start (or putting into Stand-by) and Stop are controlled
by short pulses. Use closing contacts in parallel for start and breaking contacts in
series for stop. Therefore, an unlimited number of start and stop devices can be
wired in parallel to the starter. Terminals 910 offer a 24 VDC voltage to LED-
indicators indicating the starter is On or Stand-by. The output can feed up to 10
paralell 20 mA indicators. Lamps are not permitted, the current is too large.
11–12 Large installations sometimes have two units working in parallel. The second unit
will start after the first unit has switched over from star to delta if terminals 11–12
of the first unit are linked to terminals 3–4 of the second unit. (Alternatively, a
LCC-unit is installed, starting and stopping the second unit controlled by the
actual capacity requirement. See Chapter '7 Connection of certain options'.)
20–25 Certain options require 24 VDC or 24 VAC supply, or both. Anti surge control
ASC is an example. The manual for the relevant option shows what supply to use.
30–35 These terminals must always be wired to the vacuum unit. For easy wiring,
vacuum unit terminals have the same terminal numbers, i.e 30–35. However,
inside the vacuum unit the function may be used or not used depending on what
functions are available in the unit or what options have been ordered with the
unit. Standard functions and options inside the vacuum unit are factory wired.
The start-up valve is installed in all Nederman High Vacuum units. The Thermal
Switch (TS) is installed in VAC 20 and RBU units (but not in VAC 12 units). The
compressed air switch (CAS) is an option for all vacuum units.
40–58 Wiring to the dust collector(s). Here, a large number of options are available,
all prepared for in the starter. In a "standard installation" only a limited number
of available functions are utilised. A short description follows. For further
information see the manual for the actual product/option.
High Vacuum Starter, Advanced EN
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