Endress+Hauser TOCII CA72TOC - Signal Connection

TOCII CA72TOC Wiring
Endress+Hauser 23
4.1.3 Signal connection
a0011911
Fig. 6: Signal connection
!
Note!
TOCII CA72TOC is suitable for connection to industrial mains support according to EN 61326-1,
class A.
binary outbinary out
1
2
3
4
5
6
7
8
binary inbinary in
0/4-20
mA
0/4-20
mA
RS 232RS 232
I
III
IV
II
+
-
+
-
40
41
1
2
1
2
1
2
1
2
+24VDC
GND
+24VDC
GND
+24VDC
GND
+24VDC
GND
+24VDC
GND
+24VDC
GND
+24VDC
GND
+24VDC
GND
+24VDC
GND
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
I Alert 1 Calibration, external activation
II Alarm for limits 2 Adjustment, external activation
III Standby 3 Screen flush, external activation
IV Operating control 4 Power flush, external activation
40 Signal output channel 1 5 Not assigned
41 Signal output channel 2 (optional) 6 Not assigned
7 Standby, external activation
8 Channel switchover, external activation (optional)
Messages I to IV Potential-free relay contact (max. 0.2 A and 50 V), normally closed
(NC)
Relay contact I closed = no fault messages
Relay contact II closed = no collective alarm
Relay contact III closed = no standby
Relay contact IV closed = operating check
At the end of a measuring cycle, relay IV opens for 2 seconds to
signal the end of the measuring cycle.
Signal outputs 40 to 41 0 to 20 mA or 4 to 20 mA can be switched, galvanically isolated,
max. load 500 Ω
Signal inputs 1 to 8 24 V DC active, max. load 500 Ω