421QIM Series Quad Input Module Introduction The E-Plex 421QIM is an active low digital input module. It provides 4 channels of digital I/O in an encapsulated unit to detect inputs from equipment that switches to ground. The module has LEDs which will provide local verification of the status of the inputs. Key Features Design Specifications • active low digital inputs 4 • Shock: Mil Std 202 Method 213 test condition 1 • ocal LED status indication L • ibration: Tested to Lloyds Register Approval V Vibration Test 2 • LEN value 4 • oisture resistance: IP66 M Electrical Specifications • CB characteristics: UL94V-0 P • gnition protection: UL 1500 compliant I • perating Voltage : 10VDC to 32VDC O • alt spray: Tested to Lloyds Register Approval Salt S Spray Test • perating Current : 20mA to 45mA (with all LEDs O active at max voltage) • perating Temperature: -40°C to 60°C O • Input Low Threshold : - 0.5VDC to 1.0VDC • nput High Threshold : 4.6VDC to 32VDC I • torage Temperature: -55°C to 85°C S • perating Humidity: 0% to 100% (condensing O • eight: 2.8 ounces (80g) W Powering systems - Empowering designers

421QIM Series Typical Wiring Diagram Databus wires (E-Plex+ and E-Plex-) should be tied into the clock module or any additional units on the twisted pair bus. The input wires should be connected to the equipment or switches they are sensing. All returns are common inside the module. A single return may be used for all 4 inputs in the case of a rotary switch. All wire is 16AWG (1.3mm2) pre-tinned and stripped 6” (152.4mm) length. All unused wires should be cut and capped. Return Return Return Return Active LED 1 LED 3 LED 2 LED 4 Input 4 A2 Input 3 E2 Input 2 E-Plex + Input 1 E-Plex – Wiring Specifications...

421QIM Series Dimensional Diagram 0.55 [13.97] Ø0.14 [Ø3.56] 1.58 [40.13] Ø0.70 [Ø17.78] 3.51 [89.15] 3.98 [101.09] 0.35 [8.89] Mounting Specifications Screw assembly to a flat mounting surface in 2 places, as shown in the illustration. Mounting Specifications Imperial (English) fasteners: Use #6 size screw, #6 split lock washer, #6 washer. Torque to 8~10 in-lb. Do not exceed this torque as it could cause damage to the electronics. Metric fasteners: Use M3 size screw, M3 split lock washer and M3 washer. Torque to 90~113 N-cm. Do not exceed this torque as it could cause damage to the electronics....

Powering Systems - Empowering Designers George Summers Close, Medway City Estate, Rochester, Kent ME2 4EL tel: +44 (0)1634 778704 Fax: +44 (0)1634 290773 email: [email protected] web: www.e-plex.co Important Notice: E-Plex Ltd. (E-Plex) reserves the right to make changes to or discontinue any product or service identified in this publication without notice. E-Plex advises its customers to obtain the latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current. E-Plex assumes no responsibility for infringement of patents or rights...