Specifications
Original instructions
Overview
This section contains specifications for the 170 AAO 921 00 I/O base.
General Specifications
Module type
4 analog outputs
Output range
+/- 10 V
4 ... 20 mA
Supply voltage
24 VDC
Supply voltage range
20 ... 30 VDC
Supply current consumption
(base)
max. 530 mA at 24 VDC
Supply current consumption
(actuators)
max. 150 mA at 24 VDC (+/- 5 %)
Power dissipation
5.6 W typical
8.5 W maximum
I/O map
5 output words
Isolation
Between channels
none
Between base power supply and ground
500 Vcc, 1 min
Between channels and ground
500 VAC, 1 min
Output protections
short circuits (in voltage)
circuits open in current
polarity inversion
Base power supply protection
+/- 30 V (voltage or current output)
Common mode rejection
250 VAC @ 47 ... 63 Hz or 250 VDC Channel-to-ground
Fuses
Internal (not user-replaceable)
2 A slow-blow
External (actuator power supply)
1 A slow-blow (Bussmann GDC-1A or equivalent)
EMC
Immunity
IEC 1131-2 Surge on auxiliary power supply 500V
Emissions
EN 50081-2
Agency approvals
UL, CSA, CE, FM Class 1 Div. 2 pending
Physical Dimensions
Width
125 mm (4.9 in)
Depth (with no adapter)
40 mm (1.54 in)
Length
141.5 mm (5.5 in) with no or one busbar
Weight
215 g (0.45 lb)
NOTE: The 24 VDC actuator power supply is protected in the same way as the analog outputs (different from the base power supply).
Analog Outputs
Number of channels
4
Format of transmitted data
full 16 bits signed (2's complement)
Protection (base and actuators)
polarity inversion
Range
+/-10 V
4 ... 20 mA (current source or sink)
Load impedance
1 KOhm minimum
600 Ohms maximum
Capacitative load
< 1 micro F
< 1 micro F
Error at 25 deg. C
0.2% PE*
0.4% PE*
Error at 60 deg. C
0.25% PE*
0.5% PE*
Temperature drift (60 deg. C)
10ppmPE*/ deg. C
30ppmPE*/ deg. C
Resolution
12 bits + sign
12 bits + sign
Update time for the 4 outputs
2 ms
NOTE: *Not to be confused with Protective Earth. PE is used here as a European notation for full scale, with the following values:
  • 10 V in range of +/- 10 V
  • 20mA in range of 4 ... 20 mA