Hach-Lange SC 1000 - Manual (Page 147)

145
A.4 Attach the external relay module
The external relay card provides 4 relays, each with one change-over contact. The relays
can switch maximum 250 VAC, 5 A (UL, SPDT-CO, change-over). They can be
programmed for limits, status, timers, and special functions.
1. Remove power and disconnect all cable connections to the module.
2. Place the external relay module on the DIN rail to the right of the base module and
slide firmly against the base module (or other connected modules).
3. Make the appropriate connections as shown in Figure 78 and Table 51 .
4. Connect cables to the module and reconnect power from the instrument.
Figure 77 External base module
Table 50 Base Module Terminal Assignments
Terminal Terminal assignment Description
1 + 24 VDC Power Supply (+)
2 Not used —
3 0 V Power Supply (–)
4 PE (Protective Earth) Ground 24 V
5 + For sc1000 network expansion, coming
6 – For sc1000 network expansion, coming
7 Not used —
8 PE (Protective Earth) Ground network connection
9–12 Not used —
13 + For sc1000 network expansion, going
14 – For sc1000 network expansion, going
15 Not used —
16 PE (Protective Earth) Ground network connection