Spectrum Controls 1734sc-OE2CIH - Manual (Page 70)

A-4 Appendix A: Configuration Information
User’s Manual Pub. 0300272-01 Rev. A.0
Table A-4 General Electrical Specifications
Parameter Specification
Module location 1734-TBxx
Isolation Voltage 50 V (continuous) Functional Insulation Type, channels to backplane and between
channels (tested at 707 VDC for 1 minute)
5 V PointBus current 55 mA
External DC power
Supply Voltage
24 VDC nominal
10 VDC-28.8 VDC (Voltage Range)
For Power Supply Voltages less than 12 V limit the output load to 400 ohms if
using 20 mA output current or limit the output current to 16 mA into the
maximum load of 750 ohms.
Field Supply Power Draw
with 20 mA into 750 ohm
loads. 2.1 VA max
1.85 VA @ 24 VDC typ.
Field Supply Current Draw
with 20 mA into 750 ohm
loads. 175 mA @ 12 VDC max
77 mA @ 24 VDC typ.
Power dissipation 1.5 W max (worst case power dissipation is with 12 VDC supply, 20 mA load
currents into 750 ohms)
1.25 W typ. @ +24 Vin 20 mA load currents into 750 ohms
Thermal dissipation 6.12 BTU/hr max.
(4.27 BTU/hr typ. at 24 Vin)
Enclosure Dimensions
(H×W×D), approx. 56 Ч 12 Ч 77.50 mm (2.21 Ч 0.47 Ч 3.05 in.)
Key switch position Unit will be shipped with the key switch in the 4th position
(that is, an Analog Output Module)
Enclosure type rating None (open-style)
Wire size Determined by installed Terminal Block
Data Format Signed integer
Maximum Input’s Overload Fault protected to ±24 VDC
Calibration Factory-only calibration supported, no user calibration
Reliability
The Mean Time between Failure (MTBF) target for the 1734sc-OE2CIH module is
500,000 hours.