Siemens ST950 Plus+ User Manual page 61

ST950 Plus+ User Manual
Figure 31 shows the function of the terminals. The arrows are coloured to indicate the conductor
colours of connected cables (in the above example two cables).
The +48V and 0V carry power to the nodes, whereas the D+ and D- carry the RS485 data
communications.
3.16.5 CIC/CTB Interfaces: 48V Power In
With reference to Figure 29 the incoming 48V from the Redundancy Modules is terminated to the
Faston terminals on the CTB. The black 0V wires terminate to the GND terminals, and the Orange
wires terminate at the Power Bank terminals.
In addition, the Redundancy module also provides power supply monitoring signals to the CTB,
terminated at PL3 "48V PSU MON", with the following pin connectivity:
Pin Legend
1 PSU MON 1
2 PSU MON 2
3 PSU MON 3
4 GND
3.16.6 CIC/CTB Interfaces: Inrush Relay
The Inrush Relays control how the system PSUs power up on mains application and act to minimise
inrush currents, protecting the input fuses to the system. One inrush relay is fitted as standard to
the ST950 Plus cabinet, which can support up to 3 PSUs. Where more than 3 PSUs are required
+
an additional Inrush relay kit is required.
PL4 provides drive connectivity for up to two inrush relays which are controlled by the CIC.
The connection detail is as follows:
Pin Legend
1 +24V OUT
2 RLY1_DRV
3 +24V OUT
4 RLY2_DRV
5 NC
6 NC
ST950 Plus+ User Manual
Function
Analogue monitor for PSU 1 of the
Redundancy Module.
Analogue monitor for PSU 2 of the
Redundancy Module.
Analogue monitor for PSU 3 of the
Redundancy Module.
Return (not used)
Function
+24V to Positive Control for Inrush Relay 1
Open Drain Output for Negative Control
Inrush Relay 1
+24V to Positive Control for Inrush Relay 2
Open Drain Output for Negative Control
Inrush Relay 2
No Connection
No Connection
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