pg500PG500 Indicator with a built-in converter and a large LED display; Abundant optional function like communication and analog output; Resin pressure; Download. Catalogs; Manuals; CAD files;Response send time after PG500 receives ENQ 3 ms max. Response send time after PG500 receives ACK 3 ms max. Response send time after PG500 receives NAK 3 ms max.