Description
The model PM28S provides six types of input functions in one easy-to-use, two-channel isolated product.
DESCRIPTION:
As an amplifier, it accepts differential line driver, single-ended, and magnetic signals, converting them to single-ended signals for use with counters and indicators. This unit is isolated from input to output and allows input signals to travel long distances without degradation. The isolation provides higher noise immunity for the total system. The input termination is programmable to match most encoders, pickups, and other input devices, including many low-level flow meters. The PM28S also provides a power source for encoders, pickups, and other input devices. Its special MOSFET output will typically drive up to six loads. The two channels operate independently, so any combination of inputs can be used. All field connections are made through a terminal strip that accepts numbers 22 through 12 AWG
SPECIFICATIONS:
Input Power: 115/230 VAC, 10% 50/60 Hz 6 VA
Input Transducer Power:Â 12 VDC 5% @ 150 mA
Isolated Output Power:Â 12 VDC 5% @ 150 mA
Transducer Inputs:
12V Inputs: Voltage Range: 12-30 VDC; High Trip Point: 9 VDC min.; Low Trip Point 3 VDC max.
5V Inputs: Voltage Range: 5-12 VDC; High Trip Point: 3.5 VDC min.; Low Trip Point: 1.0 VDC max., Input Frequency 100 kHz max.
TTL Inputs: Voltage Range: 2.5-5 VDC; High Trip Point: 1.8 VDC min.; Low Trip Point: .8 VDC max.
Magnetic Inputs: Voltage Range: 2-30 VPP; High Trip Point: .8 VDC min.; Low Trip Point: .2 VDC max.
Flow Meter Inputs: Voltage Range: 50-500 mVP; High Trip Point: 50 mVDC min.; Low Trip Point: 15 mVDC max; Input Frequency: 100 kHz max
Outputs:
VοL: 0.5 V typ. @ 70 mA sink
VοH: 11.1 V typ. @ 70 mA source
Output Resistance: 15 ohm @ 10 mA typ.
Rise Time: 40 nS max.
Fall Time: 40 nS max.
Peak Output Current: 1.5 A max.
Output Current: 120 mA max.
Output Frequency: 100 kHz max.
Number of MAX or MAXjr loads: 6 per channel
Environmental:
Operating Temperature: 32° to 122°F (0° to 50°C)
Storage Temperature: 0° to 186°F (-18° to 85°C)
Relative Humidity: 0% to 90% noncondensing
The PM28S also provides a power source for encoders, pickups, and other input devices. Its special MOSFET output will typically drive up to six loads. The two channels operate independently, so any combination of inputs can be used. All field connections are made through a terminal strip that accepts numbers 22 through 12 AWG.
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Note: For other application considerations see the Dynapar brand PM21S Differential Line Receiver and Supply in the Digital Accessories section.
