Connecting Ac Power To The 980 Flow Meter - Sigma 980 Operating And Maintenance Manual

Section 2
Figure 10 Enclosure Wiring Access
1
8
1. Base, CPU, and 4–20 mA Circuit Boards
2. Ribbon Cable Assembly
3. Batteries (3 AA-size)
2.5.1

Connecting ac Power to the 980 Flow Meter

DANGER
When high-voltage power is
applied to the flow meter,
provisions must be made for
disconnecting external power to
the flow meter during servicing.
Page 32
Wiring the Controller
2
ON
4. Voltage Isolation Barrier
5. Pre-wired RS-232 connector
6. Low voltage wiring
DANGER
Si du courant à haute tension doit être appliqué aux débitmètre, il est nécessaire
de prévoir un moyen de débrancher l'alimentation électrique externe du
débitmètre au cours de la maintenance.
PELIGRO
En caso de aplicarse una alimentación de alta tensión al medidor de flujo, deben
tomarse las precauciones necesarias para desconectar la potencia externa al
medidor al realizar el servicio.
GEFAHR
Soll den Strömungsmessern Hochspannungsstrom zugeführt werden, ist dafür
zu sorgen, daß während der Wartung die externe Stromversorgung
unterbrochen ist.
PERICOLO
Se l'alimentazione al misuratore di portata viene effettuata con alta tensione
deve essere installato un dispositivo di interruzione dell'alimentazione esterno
per scollegarlo quando è in servizio.
3
J3 J4 J1
J1
TB3 TB3 pH TB4
RAIN TB 9 ANALOG
1
SHIELD
RAIN+
NO
REF RAIN–
COM RELAY 4
pH SHIELD
NC
RTD CH 1
NO
–5V COMMON
1 TB6
F1 F2
COM RELAY 3
COMMON RTD SHIELD
NC
RTD RTD –
+5V CH 2
NO
SHIELD
T, 1.0A 250V COMMON
485A
COM RELAY 2
485B SHIELD
NC
1
NO 485+ CH 3
TOTAL +
COM RELAY 1 485GND COMMON
HOT/ 1 TOTAL –
J12 NC SHIELD SHIELD
SHIELD
RS485 TB7 RS232C
TOTALIZER
NEU/ 2
7 6
SIZE AA
J2
39 1
40 2
1
TB1
J11
TB11 AV
SHEILD
RCV–
TB10 4-20 mA
CH 4 CH A+
RCV+
COMMON CH A–
XMIT–
SHIELD SHIELD XMIT+
CH 5 CH B+ COMMON
COMMON CH B– +12V
SHIELD SHIELD DEPTH–
CH 6 START DEPTH+
COMMON EVENT SHIELD
SHIELD BOTTLE COMMON
CH 7 PULSE DSR
COMMON COMMON RXD
SHIELD SHIELD DTR
RS232C RS232C
TXD
+12V
RS232C
7. High voltage wiring
8. Power Supply
4
5