1.5.3.2.2 Electrical connection
Fig. 58: Electrical connection
1) Electrical isolation
2) Switchgear cabinet earthing
Please observe the following information:
● The Shield connections of the CS31 bus and FE of the supply voltage have no connection
within the device.
● The process voltage must be included in the earthing concept of the control system (e.g.
earthing of the minus pole).
● The connections of all sensors must be electrically isolated from the mounting environment
of the sensors. The cable shields of the temperature sensors are earthed to the switchgear
cabinet at the entry into the cabinet. The setting of the module address as well as the con-
figuration of the analog channels are performed by means of DIP switches (see next pages).
● Unused inputs must be configured as "not evaluated" (DIP switch).
● The current sources in AI523 are configurable and therefore not always active. The current
sources are connected alternately with the multiplex method. Consequently, the device does
not have 8 current sources.
● The module address and the analog channels are set with DIP switches.
Table 48: Pin assignment CS31 bus (X1)
Connector / Terminal Pin Assignment / Signal
X1 / Shield 1 No internal connection
X1 / B2 2 BUS 2
X1 / B1 3 BUS 1
Table 49: Pin assignment AI (X2)
Connector / Terminal Pin Assignment / Signal
X2 / 1.0 4 AI523 / I0- (AGND1)
X2 / 2.1 5 AI523 / I1+
X2 / 2.0 6 AI523 / I0+
X2 / 1.2 7 AI523 / I2- (AGND1)
Replacement devices: I/O modules > Replacement device 07AI91-AD
2018/09/24 3ADR010122, 8, en_US 91
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