Keithley 500 939 01C free download

File name 500_939_01C.pdf

PCM3 Power Control Board/Cable The PCM3 is a general purpose remote relay card for the control of power AC and DC devices. Ideal for demanding control applications in scientific and industrial automation systems, the KM3 permits the direct interface of relays, heaters, motors, actuators, and a wide variety of AC and DC devices-over the full range of voltages from 10 to 280V. The KM3 is the external relay board which is normally included with the KM2 module set. It is an option for the System 570, and can be used as a spare relay board for the PCM2. The card is fully optoisolated and protected. All connections are made to high-current screw terminals, and the relays are industry standard, plug-in, solid-state elements, so the system is readily reconfigured as the application requires. The KM3 is a remote unit which keeps potentially hazardous and noisy currents out- side the system environment. The remote assembly can be mounted in a variety of positions. The PCM3 provides up to 16 channels of power interface. Each channel can be con- figured with plug in relays for DC or AC output. Each channel is short-circuit protected with plug-in fuses, and isolated to 1OOOV AC. Control channels can switch up to 3A. LED indicators are provided to indicate channel status. A ribbon cable is used to con- nect the remote card to the interface board. WARNING: The relay card should not be handled unless all power to externalcircuits has been disconnected. For maximum safety, mount the relay card in an enclosure. User-Configured Components The PCM3 has provisions for 16 channels of plug-in relays. Two relay types can be ac- comodated: the AC output relay and the DC output relay. Either relay type can be in- stalled in any channel position. Each channel is interfaced with two screw terminals on the remote card. Table 1. User-Configured Components on the PCM3 Name Designation Function Screw Terminals J161 Screw Terminals for connection of AC/DC output chan- nels (32 terminals) Screw Terminals f External +5V power source connection (2 terminals) Cable 1 CESl Linking cable between the System 570 and the relay card assembly (50 pin) Fuses See Figure 1 Per channel current limit plug-in wire fuses, 5A Relays See Figure 1 Plug-in modular relays Jumper See Figure 1 +5V power jumper Document Number: 500-939-01 Rev. C PcM3-1 PCM3 I I I I I I I I